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CDC tracking new COVID strain
On Aug. 17, the agency posted on X, formerly known as Twitter, that the lineage has been detected in the United States, Denmark, and Israel.
“As we learn more about BA.2.86, CDC’s advice on protecting yourself from COVID-19 remains the same,” the CDC said on X.
A case of BA.2.86 was detected at a laboratory at the University of Michigan, CBS News reported. It’s not clear how the university obtained the sample that was sequenced. A case was also detected in the United Kingdom, the news outlet said.
The World Health Organization is also tracking BA.2.86 and has classified it as a “variant under monitoring.”
“More data are needed to understand this COVID-19 variant and the extent of its spread, but the number of mutations warrants attention. WHO will update countries and the public as we learn more,” the WHO said on X.
The strain is so new that scientists don’t know if BA.2.86 is more easily spread, causes more severe symptoms than existing strains, or will be more resistant to vaccines and natural immunity developed over the last few years.
Early research indicates BA.2.86 “will have equal or greater escape than XBB.1.5 from antibodies elicited by pre-Omicron and first-generation Omicron variants,” Jesse Bloom, PhD, a virologist at the Fred Hutchinson Cancer Center, said in a slide deck published Aug. 17. (XBB.1.5 is the Omicron subvariant that is targeted in the updated COVID booster shot to be released soon.)
Still, Dr. Bloom noted that “even if a highly mutated new variant like BA.2.86 starts to spread, we will be in a far better place than we were in 2020 and 2021, since most people have some immunity to SARS-CoV-2 now.”
A version of this article first appeared on WebMD.com.
On Aug. 17, the agency posted on X, formerly known as Twitter, that the lineage has been detected in the United States, Denmark, and Israel.
“As we learn more about BA.2.86, CDC’s advice on protecting yourself from COVID-19 remains the same,” the CDC said on X.
A case of BA.2.86 was detected at a laboratory at the University of Michigan, CBS News reported. It’s not clear how the university obtained the sample that was sequenced. A case was also detected in the United Kingdom, the news outlet said.
The World Health Organization is also tracking BA.2.86 and has classified it as a “variant under monitoring.”
“More data are needed to understand this COVID-19 variant and the extent of its spread, but the number of mutations warrants attention. WHO will update countries and the public as we learn more,” the WHO said on X.
The strain is so new that scientists don’t know if BA.2.86 is more easily spread, causes more severe symptoms than existing strains, or will be more resistant to vaccines and natural immunity developed over the last few years.
Early research indicates BA.2.86 “will have equal or greater escape than XBB.1.5 from antibodies elicited by pre-Omicron and first-generation Omicron variants,” Jesse Bloom, PhD, a virologist at the Fred Hutchinson Cancer Center, said in a slide deck published Aug. 17. (XBB.1.5 is the Omicron subvariant that is targeted in the updated COVID booster shot to be released soon.)
Still, Dr. Bloom noted that “even if a highly mutated new variant like BA.2.86 starts to spread, we will be in a far better place than we were in 2020 and 2021, since most people have some immunity to SARS-CoV-2 now.”
A version of this article first appeared on WebMD.com.
On Aug. 17, the agency posted on X, formerly known as Twitter, that the lineage has been detected in the United States, Denmark, and Israel.
“As we learn more about BA.2.86, CDC’s advice on protecting yourself from COVID-19 remains the same,” the CDC said on X.
A case of BA.2.86 was detected at a laboratory at the University of Michigan, CBS News reported. It’s not clear how the university obtained the sample that was sequenced. A case was also detected in the United Kingdom, the news outlet said.
The World Health Organization is also tracking BA.2.86 and has classified it as a “variant under monitoring.”
“More data are needed to understand this COVID-19 variant and the extent of its spread, but the number of mutations warrants attention. WHO will update countries and the public as we learn more,” the WHO said on X.
The strain is so new that scientists don’t know if BA.2.86 is more easily spread, causes more severe symptoms than existing strains, or will be more resistant to vaccines and natural immunity developed over the last few years.
Early research indicates BA.2.86 “will have equal or greater escape than XBB.1.5 from antibodies elicited by pre-Omicron and first-generation Omicron variants,” Jesse Bloom, PhD, a virologist at the Fred Hutchinson Cancer Center, said in a slide deck published Aug. 17. (XBB.1.5 is the Omicron subvariant that is targeted in the updated COVID booster shot to be released soon.)
Still, Dr. Bloom noted that “even if a highly mutated new variant like BA.2.86 starts to spread, we will be in a far better place than we were in 2020 and 2021, since most people have some immunity to SARS-CoV-2 now.”
A version of this article first appeared on WebMD.com.
On the trail of a new vaccine for Lyme disease
The results of their study were published in the journal Microbiome.
Ticks are vectors of many harmful pathogens that can cause life-threatening illnesses. Ixodes ricinus (in Europe) and Ixodes scapularis (in Canada and the United States) carry Borrelia, the bacteria that cause Lyme disease. At the moment, there is no vaccine for this disease. But that could all change, thanks to the findings of scientists at the National Research Institute for Agriculture, Food, and Environment (INRAE), in collaboration with the Agency for Food, Environmental, and Occupational Health and Safety and the National Veterinary School of Alfort, France.
“Ticks can transmit a broad variety of pathogens of medical importance, including Borrelia afzelii, the causative agent of Lyme borreliosis in Europe. Tick microbiota is an important factor modulating not only vector physiology, but also the vector competence,” the team reported. They focused their efforts on developing a vaccine that would disturb the tick microbiota and thus reduce Borrelia colonization.
To explore this indirect approach, they injected a harmless strain of Escherichia coli bacteria into mice, which then produced antibodies. Their reasoning was that when a tick bites one of these mice, the antibodies would pass into the arachnid’s microbiota and disturb it, thereby making the tick less harmful. And indeed, the researchers’ work showed that in the ticks that fed on vaccinated mice, levels of Borrelia levels were much lower than in than ticks that fed on unvaccinated mice (see video for an explanation). So, when given to a mouse, this vaccine “protects” the tick against colonization by Borrelia but does not protect the mouse against the disease.
The study has advanced this area of research in two significant ways: It provides new information on the importance of the microbiota when it comes to ticks that are infected with Borrelia, and it suggests an innovative vaccination strategy. Indeed, the results confirm that tick microbiota is essential for the development of Borrelia in the arachnid. As noted in an INRAE press release, “This is a key piece of data that opens the door to one day having an innovative vaccination strategy aimed at perturbing the microbiota of the vector of the Lyme disease agent.”
Dengue, Zika virus, and malaria are also transmitted by a vector – the mosquito. Innovative antimicrobiota vaccines may be able to control these diseases as well.
This article was translated from the Medscape French Edition. A version of this article appeared on Medscape.com.
The results of their study were published in the journal Microbiome.
Ticks are vectors of many harmful pathogens that can cause life-threatening illnesses. Ixodes ricinus (in Europe) and Ixodes scapularis (in Canada and the United States) carry Borrelia, the bacteria that cause Lyme disease. At the moment, there is no vaccine for this disease. But that could all change, thanks to the findings of scientists at the National Research Institute for Agriculture, Food, and Environment (INRAE), in collaboration with the Agency for Food, Environmental, and Occupational Health and Safety and the National Veterinary School of Alfort, France.
“Ticks can transmit a broad variety of pathogens of medical importance, including Borrelia afzelii, the causative agent of Lyme borreliosis in Europe. Tick microbiota is an important factor modulating not only vector physiology, but also the vector competence,” the team reported. They focused their efforts on developing a vaccine that would disturb the tick microbiota and thus reduce Borrelia colonization.
To explore this indirect approach, they injected a harmless strain of Escherichia coli bacteria into mice, which then produced antibodies. Their reasoning was that when a tick bites one of these mice, the antibodies would pass into the arachnid’s microbiota and disturb it, thereby making the tick less harmful. And indeed, the researchers’ work showed that in the ticks that fed on vaccinated mice, levels of Borrelia levels were much lower than in than ticks that fed on unvaccinated mice (see video for an explanation). So, when given to a mouse, this vaccine “protects” the tick against colonization by Borrelia but does not protect the mouse against the disease.
The study has advanced this area of research in two significant ways: It provides new information on the importance of the microbiota when it comes to ticks that are infected with Borrelia, and it suggests an innovative vaccination strategy. Indeed, the results confirm that tick microbiota is essential for the development of Borrelia in the arachnid. As noted in an INRAE press release, “This is a key piece of data that opens the door to one day having an innovative vaccination strategy aimed at perturbing the microbiota of the vector of the Lyme disease agent.”
Dengue, Zika virus, and malaria are also transmitted by a vector – the mosquito. Innovative antimicrobiota vaccines may be able to control these diseases as well.
This article was translated from the Medscape French Edition. A version of this article appeared on Medscape.com.
The results of their study were published in the journal Microbiome.
Ticks are vectors of many harmful pathogens that can cause life-threatening illnesses. Ixodes ricinus (in Europe) and Ixodes scapularis (in Canada and the United States) carry Borrelia, the bacteria that cause Lyme disease. At the moment, there is no vaccine for this disease. But that could all change, thanks to the findings of scientists at the National Research Institute for Agriculture, Food, and Environment (INRAE), in collaboration with the Agency for Food, Environmental, and Occupational Health and Safety and the National Veterinary School of Alfort, France.
“Ticks can transmit a broad variety of pathogens of medical importance, including Borrelia afzelii, the causative agent of Lyme borreliosis in Europe. Tick microbiota is an important factor modulating not only vector physiology, but also the vector competence,” the team reported. They focused their efforts on developing a vaccine that would disturb the tick microbiota and thus reduce Borrelia colonization.
To explore this indirect approach, they injected a harmless strain of Escherichia coli bacteria into mice, which then produced antibodies. Their reasoning was that when a tick bites one of these mice, the antibodies would pass into the arachnid’s microbiota and disturb it, thereby making the tick less harmful. And indeed, the researchers’ work showed that in the ticks that fed on vaccinated mice, levels of Borrelia levels were much lower than in than ticks that fed on unvaccinated mice (see video for an explanation). So, when given to a mouse, this vaccine “protects” the tick against colonization by Borrelia but does not protect the mouse against the disease.
The study has advanced this area of research in two significant ways: It provides new information on the importance of the microbiota when it comes to ticks that are infected with Borrelia, and it suggests an innovative vaccination strategy. Indeed, the results confirm that tick microbiota is essential for the development of Borrelia in the arachnid. As noted in an INRAE press release, “This is a key piece of data that opens the door to one day having an innovative vaccination strategy aimed at perturbing the microbiota of the vector of the Lyme disease agent.”
Dengue, Zika virus, and malaria are also transmitted by a vector – the mosquito. Innovative antimicrobiota vaccines may be able to control these diseases as well.
This article was translated from the Medscape French Edition. A version of this article appeared on Medscape.com.
FROM MICROBIOME
Healthy babies can still get very sick from RSV
Any parent might naturally assume that their newborn is at little risk from respiratory syncytial virus (RSV), which in healthy infants has been thought to cause mild symptoms similar to having a cold. But a new study challenges the assumption that only infirm children are at risk for the worst outcomes from RSV, finding that
The researchers, who published their study in JAMA Network Open, said the results reinforce the importance of a new preventive injection that can lower the risk for severe RSV infection in babies.
“RSV is the number one cause of hospitalizations in young infants,” said Natasha Halasa, MD, MPH, an infectious disease specialist at Vanderbilt University Medical Center in Nashville, Tenn., and the lead author of the new study. But “the vast majority of kids didn’t have underlying medical conditions” when they got sick.
Every infant in the study was in an intensive care unit for at least 24 hours, Dr. Halasa said, and most babies gave no prior indication that RSV would affect them so profoundly.
“Two to three of every 100 babies in the United States will be hospitalized for RSV in their first year of life,” added study author Angela Campbell, MD, MPH, of the Coronavirus and Other Respiratory Viruses Division of the Centers for Disease Control and Prevention in Atlanta.
Until recently, only one treatment was available for children up to age 2 at high risk for RSV, the monoclonal antibody palivizumab (Synagis). Palivizumab is reserved for children who are born prematurely, are immunocompromised, or have chronic heart or lung disease. The injection is given monthly during the 5-month peak of RSV season, from fall to spring.
In July, the Food and Drug Administration approved, and the CDC has since recommended, a new monoclonal antibody called nirsevimab (Beyfortus) to prevent the worst effects of RSV. Nirsevimab is intended for all newborns under age 8 months who were born during the RSV season, or babies who will be entering that season before reaching 8 months. The injection is given only once and can act for 150 days. The FDA and CDC actions came following a clinical trial showing that nirsevimab lowers the risk for hospitalization from RSV among infants by more than 75%.
“We’re very excited that this product exists now,” Dr. Campbell said.
Chart reviews during the ‘tripledemic’
In fall 2022 the United States experienced a “tripledemic” of elevated hospitalizations for COVID-19, influenza, and RSV. For the new study, Dr. Halasa and her colleagues examined the medical records of 600 infants (under age 1; average age, 2.6 months) admitted to U.S. ICUs for lower respiratory tract infections caused by RSV from October to December 2022, during the height of the tripledemic.
More than 60% of admissions, 361, were boys; 44% were White, 23% were Hispanic, 16% were Black, 10% were unknown race, 5% were multiple race, and 2% were Asian.
Of the 600 infants, 572 (95.3%) required oxygen at the hospital and 487 (81.2%) had no underlying medical conditions linked to higher risk from RSV. The other infants had at least one ailment, such as a cardiac or lung condition, that could result in more severe RSV outcomes.
The 169 preemies in the study population were more likely to be intubated in the ICU than were those born at term. But 90 of the 143 total recorded intubations happened among full-term infants. Two children in the study group died.
Christopher Horvat, MD, MHA, who works in the pediatric ICU at the University of Pittsburgh Medical Center, called the new study “important,” adding that it shows “the RSV burden is substantial for children who are otherwise healthy.” Dr. Horvat, who was not involved in the work, said the new data highlight the value of preventive measures to prevent any repeat of the tripledemic.
On the same day the new study was published, the American Academy of Pediatrics (AAP) released a statement calling for widespread access to nirsevimab.
“The American Academy of Pediatrics recommends that all infants – and especially those at high risk – receive the new preventive antibody, nirsevimab, to protect against severe disease caused by respiratory syncytial virus (RSV), which is common, highly contagious, and sometimes deadly,” the organization said in a statement.
The AAP called for the CDC and the Centers for Medicaid & Medicare Services to work together to ensure that any parent in America can obtain nirsevimab for their children if needed. Anyone who cannot access nirsevimab this year, the AAP said, should rely on the older treatment palivizumab instead.
The sources in this story reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
Any parent might naturally assume that their newborn is at little risk from respiratory syncytial virus (RSV), which in healthy infants has been thought to cause mild symptoms similar to having a cold. But a new study challenges the assumption that only infirm children are at risk for the worst outcomes from RSV, finding that
The researchers, who published their study in JAMA Network Open, said the results reinforce the importance of a new preventive injection that can lower the risk for severe RSV infection in babies.
“RSV is the number one cause of hospitalizations in young infants,” said Natasha Halasa, MD, MPH, an infectious disease specialist at Vanderbilt University Medical Center in Nashville, Tenn., and the lead author of the new study. But “the vast majority of kids didn’t have underlying medical conditions” when they got sick.
Every infant in the study was in an intensive care unit for at least 24 hours, Dr. Halasa said, and most babies gave no prior indication that RSV would affect them so profoundly.
“Two to three of every 100 babies in the United States will be hospitalized for RSV in their first year of life,” added study author Angela Campbell, MD, MPH, of the Coronavirus and Other Respiratory Viruses Division of the Centers for Disease Control and Prevention in Atlanta.
Until recently, only one treatment was available for children up to age 2 at high risk for RSV, the monoclonal antibody palivizumab (Synagis). Palivizumab is reserved for children who are born prematurely, are immunocompromised, or have chronic heart or lung disease. The injection is given monthly during the 5-month peak of RSV season, from fall to spring.
In July, the Food and Drug Administration approved, and the CDC has since recommended, a new monoclonal antibody called nirsevimab (Beyfortus) to prevent the worst effects of RSV. Nirsevimab is intended for all newborns under age 8 months who were born during the RSV season, or babies who will be entering that season before reaching 8 months. The injection is given only once and can act for 150 days. The FDA and CDC actions came following a clinical trial showing that nirsevimab lowers the risk for hospitalization from RSV among infants by more than 75%.
“We’re very excited that this product exists now,” Dr. Campbell said.
Chart reviews during the ‘tripledemic’
In fall 2022 the United States experienced a “tripledemic” of elevated hospitalizations for COVID-19, influenza, and RSV. For the new study, Dr. Halasa and her colleagues examined the medical records of 600 infants (under age 1; average age, 2.6 months) admitted to U.S. ICUs for lower respiratory tract infections caused by RSV from October to December 2022, during the height of the tripledemic.
More than 60% of admissions, 361, were boys; 44% were White, 23% were Hispanic, 16% were Black, 10% were unknown race, 5% were multiple race, and 2% were Asian.
Of the 600 infants, 572 (95.3%) required oxygen at the hospital and 487 (81.2%) had no underlying medical conditions linked to higher risk from RSV. The other infants had at least one ailment, such as a cardiac or lung condition, that could result in more severe RSV outcomes.
The 169 preemies in the study population were more likely to be intubated in the ICU than were those born at term. But 90 of the 143 total recorded intubations happened among full-term infants. Two children in the study group died.
Christopher Horvat, MD, MHA, who works in the pediatric ICU at the University of Pittsburgh Medical Center, called the new study “important,” adding that it shows “the RSV burden is substantial for children who are otherwise healthy.” Dr. Horvat, who was not involved in the work, said the new data highlight the value of preventive measures to prevent any repeat of the tripledemic.
On the same day the new study was published, the American Academy of Pediatrics (AAP) released a statement calling for widespread access to nirsevimab.
“The American Academy of Pediatrics recommends that all infants – and especially those at high risk – receive the new preventive antibody, nirsevimab, to protect against severe disease caused by respiratory syncytial virus (RSV), which is common, highly contagious, and sometimes deadly,” the organization said in a statement.
The AAP called for the CDC and the Centers for Medicaid & Medicare Services to work together to ensure that any parent in America can obtain nirsevimab for their children if needed. Anyone who cannot access nirsevimab this year, the AAP said, should rely on the older treatment palivizumab instead.
The sources in this story reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
Any parent might naturally assume that their newborn is at little risk from respiratory syncytial virus (RSV), which in healthy infants has been thought to cause mild symptoms similar to having a cold. But a new study challenges the assumption that only infirm children are at risk for the worst outcomes from RSV, finding that
The researchers, who published their study in JAMA Network Open, said the results reinforce the importance of a new preventive injection that can lower the risk for severe RSV infection in babies.
“RSV is the number one cause of hospitalizations in young infants,” said Natasha Halasa, MD, MPH, an infectious disease specialist at Vanderbilt University Medical Center in Nashville, Tenn., and the lead author of the new study. But “the vast majority of kids didn’t have underlying medical conditions” when they got sick.
Every infant in the study was in an intensive care unit for at least 24 hours, Dr. Halasa said, and most babies gave no prior indication that RSV would affect them so profoundly.
“Two to three of every 100 babies in the United States will be hospitalized for RSV in their first year of life,” added study author Angela Campbell, MD, MPH, of the Coronavirus and Other Respiratory Viruses Division of the Centers for Disease Control and Prevention in Atlanta.
Until recently, only one treatment was available for children up to age 2 at high risk for RSV, the monoclonal antibody palivizumab (Synagis). Palivizumab is reserved for children who are born prematurely, are immunocompromised, or have chronic heart or lung disease. The injection is given monthly during the 5-month peak of RSV season, from fall to spring.
In July, the Food and Drug Administration approved, and the CDC has since recommended, a new monoclonal antibody called nirsevimab (Beyfortus) to prevent the worst effects of RSV. Nirsevimab is intended for all newborns under age 8 months who were born during the RSV season, or babies who will be entering that season before reaching 8 months. The injection is given only once and can act for 150 days. The FDA and CDC actions came following a clinical trial showing that nirsevimab lowers the risk for hospitalization from RSV among infants by more than 75%.
“We’re very excited that this product exists now,” Dr. Campbell said.
Chart reviews during the ‘tripledemic’
In fall 2022 the United States experienced a “tripledemic” of elevated hospitalizations for COVID-19, influenza, and RSV. For the new study, Dr. Halasa and her colleagues examined the medical records of 600 infants (under age 1; average age, 2.6 months) admitted to U.S. ICUs for lower respiratory tract infections caused by RSV from October to December 2022, during the height of the tripledemic.
More than 60% of admissions, 361, were boys; 44% were White, 23% were Hispanic, 16% were Black, 10% were unknown race, 5% were multiple race, and 2% were Asian.
Of the 600 infants, 572 (95.3%) required oxygen at the hospital and 487 (81.2%) had no underlying medical conditions linked to higher risk from RSV. The other infants had at least one ailment, such as a cardiac or lung condition, that could result in more severe RSV outcomes.
The 169 preemies in the study population were more likely to be intubated in the ICU than were those born at term. But 90 of the 143 total recorded intubations happened among full-term infants. Two children in the study group died.
Christopher Horvat, MD, MHA, who works in the pediatric ICU at the University of Pittsburgh Medical Center, called the new study “important,” adding that it shows “the RSV burden is substantial for children who are otherwise healthy.” Dr. Horvat, who was not involved in the work, said the new data highlight the value of preventive measures to prevent any repeat of the tripledemic.
On the same day the new study was published, the American Academy of Pediatrics (AAP) released a statement calling for widespread access to nirsevimab.
“The American Academy of Pediatrics recommends that all infants – and especially those at high risk – receive the new preventive antibody, nirsevimab, to protect against severe disease caused by respiratory syncytial virus (RSV), which is common, highly contagious, and sometimes deadly,” the organization said in a statement.
The AAP called for the CDC and the Centers for Medicaid & Medicare Services to work together to ensure that any parent in America can obtain nirsevimab for their children if needed. Anyone who cannot access nirsevimab this year, the AAP said, should rely on the older treatment palivizumab instead.
The sources in this story reported no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM JAMA NETWORK OPEN
West Nile infections rising in the U.S.
Several signs are pointing to an impending surge in the number of human cases of West Nile virus in several regions of the United States.
West Nile virus is spread by infected mosquitoes and currently there is no cure or virus-specific treatment. In rare cases, it can be deadly. It can infect humans, birds, horses, and other mammals.
West Nile Virus is the leading cause of mosquito-borne disease in the continental United States. As of Aug. 8, 126 human cases had been identified across 22 states, according to the Centers for Disease Control and Prevention.
“Particularly here in California, it’s peak risk right now,” said Vicki Kramer, PhD, chief of vector-borne diseases in the California Department of Public Health. She said scientists there are seeing higher mosquito and infected mosquito numbers.
“Peak risk right now”
Dead birds are tested for the virus and by Aug. 4, 181 of the 913 birds tested in California have been positive, three times the total testing positive by this time in 2022.
“Last year at this time, we had 60 positive dead birds out of 817 tested,” Dr. Kramer said.
Severe flooding and high heat can contribute to the rise in mosquito populations and many parts of the country have seen plenty of both.
One of the ways scientists track infected mosquito patterns in California is by using flocks of strategically placed sentinel chickens.
“Chickens are a mosquito magnet,” Dr. Kramer said.
Chickens don’t get sick with the virus, but they do build antibodies to it. Surveillance teams check their blood every other week to track the virus.
Daniel Pastula, MD, MHS, chief of neuroinfectious diseases and global neurology at the University of Colorado School of Medicine and the Colorado School of Public Health, said the state is watching troubling signs as well.
“The concern this year,” Dr. Pastula said, “particularly along the Front Range in Colorado, is we’ve found many more mosquitoes [that are] positive for West Nile earlier in the season compared with other years.
“We’re bracing for higher-than-baseline human cases,” he said.
Asked about this year’s first human case, reported in Toronto, a region with a long winter and low incidence of the virus, he said that provides a further example that people need to be prepared even in climates not known to be mosquito-dense.
He added, however, that climate is only one factor in the severity of the season. Others include birds’ immunity and migratory patterns.
Dr. Pastula said that fluctuations in temperature and rainfall are rising with climate change and are disrupting normal baseline levels of West Nile.
“That shows we need to be prepared for West Nile virus and other mosquito-borne diseases in any place in North America or really the world. We recently saw malaria cases in the southern United States. It just shows you how dangerous mosquitoes can be.”
Avoid mosquito bites
Dr. Pastula and Dr. Kramer list the precautions people can take to protect themselves from West Nile virus:
- Limit outdoor exposure particularly at dusk and dawn.
- Wear protective clothing.
- Use .
- Repair window screens so mosquitoes cannot fly through.
- Dump and drain standing water on your property and maintain swimming pools.
Dr. Pastula noted that summer is the time human cases start to mount – typically from July and August to the first hard freeze.
“We have been warning people here up and down the Front Range of Colorado to take prevention very seriously,” Dr. Pastula said.
He pointed out that 80% who are infected with West Nile will have no symptoms.
About 20% will have flu-like illness – high fever, body and joint aches, rash, diarrhea, or headaches. Symptoms may last for weeks. About 1% of the time, he said, people can get neuroinvasive West Nile.
Dr. Pastula explained that the virus can infect the covering of the brain and spinal cord causing meningitis with very high fever, severe headaches, stiff neck, and sensitivity to light.
So far this year, there have been 89 neuroinvasive cases reported nationally, according to the CDC.
With West Nile encephalitis, the virus “can infect the brain itself causing altered mental status, movement disorders, or weakness,” Dr. Pastula said.
Sometimes it can infect the gray matter of the spinal cord causing a West Nile virus poliomyelitis, which brings polio-like symptoms.
“The West Nile encephalitis and poliomyelitis can cause permanent deficits or even death,” he said. “It’s uncommon but it’s not trivial.”
Several vaccine candidates are in development, Dr. Pastula said, but none has reached clinical trials. Part of the reason for that, he said, is that scientists must be able to predict the timing of an outbreak.
“We’re not really great at predicting outbreaks,” he said.
Although the risk for neuroinvasive disease is small, it can be higher in certain groups, he said – those who are over age 60 years or are immunocompromised; those who have diabetes, cancer, or kidney disease; or those who have undergone organ transplants.
Those infected should see a health care professional and may be able to get relief with the usual medications for flu-like illness.
Some with severe infection may need to go to the hospital, Dr. Pastula said.
A version of this article first appeared on Medscape.com.
Several signs are pointing to an impending surge in the number of human cases of West Nile virus in several regions of the United States.
West Nile virus is spread by infected mosquitoes and currently there is no cure or virus-specific treatment. In rare cases, it can be deadly. It can infect humans, birds, horses, and other mammals.
West Nile Virus is the leading cause of mosquito-borne disease in the continental United States. As of Aug. 8, 126 human cases had been identified across 22 states, according to the Centers for Disease Control and Prevention.
“Particularly here in California, it’s peak risk right now,” said Vicki Kramer, PhD, chief of vector-borne diseases in the California Department of Public Health. She said scientists there are seeing higher mosquito and infected mosquito numbers.
“Peak risk right now”
Dead birds are tested for the virus and by Aug. 4, 181 of the 913 birds tested in California have been positive, three times the total testing positive by this time in 2022.
“Last year at this time, we had 60 positive dead birds out of 817 tested,” Dr. Kramer said.
Severe flooding and high heat can contribute to the rise in mosquito populations and many parts of the country have seen plenty of both.
One of the ways scientists track infected mosquito patterns in California is by using flocks of strategically placed sentinel chickens.
“Chickens are a mosquito magnet,” Dr. Kramer said.
Chickens don’t get sick with the virus, but they do build antibodies to it. Surveillance teams check their blood every other week to track the virus.
Daniel Pastula, MD, MHS, chief of neuroinfectious diseases and global neurology at the University of Colorado School of Medicine and the Colorado School of Public Health, said the state is watching troubling signs as well.
“The concern this year,” Dr. Pastula said, “particularly along the Front Range in Colorado, is we’ve found many more mosquitoes [that are] positive for West Nile earlier in the season compared with other years.
“We’re bracing for higher-than-baseline human cases,” he said.
Asked about this year’s first human case, reported in Toronto, a region with a long winter and low incidence of the virus, he said that provides a further example that people need to be prepared even in climates not known to be mosquito-dense.
He added, however, that climate is only one factor in the severity of the season. Others include birds’ immunity and migratory patterns.
Dr. Pastula said that fluctuations in temperature and rainfall are rising with climate change and are disrupting normal baseline levels of West Nile.
“That shows we need to be prepared for West Nile virus and other mosquito-borne diseases in any place in North America or really the world. We recently saw malaria cases in the southern United States. It just shows you how dangerous mosquitoes can be.”
Avoid mosquito bites
Dr. Pastula and Dr. Kramer list the precautions people can take to protect themselves from West Nile virus:
- Limit outdoor exposure particularly at dusk and dawn.
- Wear protective clothing.
- Use .
- Repair window screens so mosquitoes cannot fly through.
- Dump and drain standing water on your property and maintain swimming pools.
Dr. Pastula noted that summer is the time human cases start to mount – typically from July and August to the first hard freeze.
“We have been warning people here up and down the Front Range of Colorado to take prevention very seriously,” Dr. Pastula said.
He pointed out that 80% who are infected with West Nile will have no symptoms.
About 20% will have flu-like illness – high fever, body and joint aches, rash, diarrhea, or headaches. Symptoms may last for weeks. About 1% of the time, he said, people can get neuroinvasive West Nile.
Dr. Pastula explained that the virus can infect the covering of the brain and spinal cord causing meningitis with very high fever, severe headaches, stiff neck, and sensitivity to light.
So far this year, there have been 89 neuroinvasive cases reported nationally, according to the CDC.
With West Nile encephalitis, the virus “can infect the brain itself causing altered mental status, movement disorders, or weakness,” Dr. Pastula said.
Sometimes it can infect the gray matter of the spinal cord causing a West Nile virus poliomyelitis, which brings polio-like symptoms.
“The West Nile encephalitis and poliomyelitis can cause permanent deficits or even death,” he said. “It’s uncommon but it’s not trivial.”
Several vaccine candidates are in development, Dr. Pastula said, but none has reached clinical trials. Part of the reason for that, he said, is that scientists must be able to predict the timing of an outbreak.
“We’re not really great at predicting outbreaks,” he said.
Although the risk for neuroinvasive disease is small, it can be higher in certain groups, he said – those who are over age 60 years or are immunocompromised; those who have diabetes, cancer, or kidney disease; or those who have undergone organ transplants.
Those infected should see a health care professional and may be able to get relief with the usual medications for flu-like illness.
Some with severe infection may need to go to the hospital, Dr. Pastula said.
A version of this article first appeared on Medscape.com.
Several signs are pointing to an impending surge in the number of human cases of West Nile virus in several regions of the United States.
West Nile virus is spread by infected mosquitoes and currently there is no cure or virus-specific treatment. In rare cases, it can be deadly. It can infect humans, birds, horses, and other mammals.
West Nile Virus is the leading cause of mosquito-borne disease in the continental United States. As of Aug. 8, 126 human cases had been identified across 22 states, according to the Centers for Disease Control and Prevention.
“Particularly here in California, it’s peak risk right now,” said Vicki Kramer, PhD, chief of vector-borne diseases in the California Department of Public Health. She said scientists there are seeing higher mosquito and infected mosquito numbers.
“Peak risk right now”
Dead birds are tested for the virus and by Aug. 4, 181 of the 913 birds tested in California have been positive, three times the total testing positive by this time in 2022.
“Last year at this time, we had 60 positive dead birds out of 817 tested,” Dr. Kramer said.
Severe flooding and high heat can contribute to the rise in mosquito populations and many parts of the country have seen plenty of both.
One of the ways scientists track infected mosquito patterns in California is by using flocks of strategically placed sentinel chickens.
“Chickens are a mosquito magnet,” Dr. Kramer said.
Chickens don’t get sick with the virus, but they do build antibodies to it. Surveillance teams check their blood every other week to track the virus.
Daniel Pastula, MD, MHS, chief of neuroinfectious diseases and global neurology at the University of Colorado School of Medicine and the Colorado School of Public Health, said the state is watching troubling signs as well.
“The concern this year,” Dr. Pastula said, “particularly along the Front Range in Colorado, is we’ve found many more mosquitoes [that are] positive for West Nile earlier in the season compared with other years.
“We’re bracing for higher-than-baseline human cases,” he said.
Asked about this year’s first human case, reported in Toronto, a region with a long winter and low incidence of the virus, he said that provides a further example that people need to be prepared even in climates not known to be mosquito-dense.
He added, however, that climate is only one factor in the severity of the season. Others include birds’ immunity and migratory patterns.
Dr. Pastula said that fluctuations in temperature and rainfall are rising with climate change and are disrupting normal baseline levels of West Nile.
“That shows we need to be prepared for West Nile virus and other mosquito-borne diseases in any place in North America or really the world. We recently saw malaria cases in the southern United States. It just shows you how dangerous mosquitoes can be.”
Avoid mosquito bites
Dr. Pastula and Dr. Kramer list the precautions people can take to protect themselves from West Nile virus:
- Limit outdoor exposure particularly at dusk and dawn.
- Wear protective clothing.
- Use .
- Repair window screens so mosquitoes cannot fly through.
- Dump and drain standing water on your property and maintain swimming pools.
Dr. Pastula noted that summer is the time human cases start to mount – typically from July and August to the first hard freeze.
“We have been warning people here up and down the Front Range of Colorado to take prevention very seriously,” Dr. Pastula said.
He pointed out that 80% who are infected with West Nile will have no symptoms.
About 20% will have flu-like illness – high fever, body and joint aches, rash, diarrhea, or headaches. Symptoms may last for weeks. About 1% of the time, he said, people can get neuroinvasive West Nile.
Dr. Pastula explained that the virus can infect the covering of the brain and spinal cord causing meningitis with very high fever, severe headaches, stiff neck, and sensitivity to light.
So far this year, there have been 89 neuroinvasive cases reported nationally, according to the CDC.
With West Nile encephalitis, the virus “can infect the brain itself causing altered mental status, movement disorders, or weakness,” Dr. Pastula said.
Sometimes it can infect the gray matter of the spinal cord causing a West Nile virus poliomyelitis, which brings polio-like symptoms.
“The West Nile encephalitis and poliomyelitis can cause permanent deficits or even death,” he said. “It’s uncommon but it’s not trivial.”
Several vaccine candidates are in development, Dr. Pastula said, but none has reached clinical trials. Part of the reason for that, he said, is that scientists must be able to predict the timing of an outbreak.
“We’re not really great at predicting outbreaks,” he said.
Although the risk for neuroinvasive disease is small, it can be higher in certain groups, he said – those who are over age 60 years or are immunocompromised; those who have diabetes, cancer, or kidney disease; or those who have undergone organ transplants.
Those infected should see a health care professional and may be able to get relief with the usual medications for flu-like illness.
Some with severe infection may need to go to the hospital, Dr. Pastula said.
A version of this article first appeared on Medscape.com.
Despite recent uptick in cases, leprosy is very rare, expert says
, according to Jose A. Lucar, MD.
“Contrary to historical beliefs, leprosy is not highly contagious,” Dr. Lucar, an infectious disease physician and associate professor of medicine at George Washington University, Washington, said in an interview. “For reasons that have to do with the makeup of genes that affect their immune system, most people are not susceptible to acquire leprosy. It’s really a small percentage of the population. It does require prolonged contact with someone with untreated leprosy – over several months – to acquire an infection. So, the risk from any type of casual contact is low.”
According to a research letter published in the CDC’s Emerging Infectious Diseases, the number of reported leprosy cases has more than doubled in the past decade. Of the 159 new cases reported nationwide in 2020, Florida accounted for about one-fifth of cases, with most limited to the central part of the state. “In the U.S., there have been 150-250 cases reported each year over the past several years,” said Dr. Lucar, who was not affiliated with the research letter. “What seems to have changed is that since 2015, there has been a rise in cases in people who are U.S.-born “In the U.S., there have been 150-250 cases reported each year over the past several years,” said Dr. Lucar, who was not affiliated with the research letter. “What seems to have changed is that since 2015, there has been a rise in cases in people who are U.S.-born," and currently, about one-third of leprosy cases are in individuals born in the United States, he noted.
The research letter described a case of leprosy in a 54-year-old man who worked in landscaping, who sought treatment at a dermatology clinic in Central Florida in 2022 for a painful and progressive erythematous rash. The lesions began on his distal extensor extremities and progressed to involve his trunk and face. According to the report, the man denied any domestic or foreign travel, exposure to armadillos (a known source of transmission), prolonged contact with immigrants from leprosy-endemic countries, or connections with someone known to have leprosy. The authors concluded that the case “adds to the growing body of literature suggesting that central Florida represents an endemic location for leprosy. Travel to this area, even in the absence of other risk factors, should prompt consideration of leprosy in the appropriate clinical context.”
Dr. Lucar said that the mechanism of leprosy transmission is not fully understood, but armadillos, which typically traverse the southern United States, are naturally infected with the bacteria that causes leprosy. “It’s possible that they can spread it to people,” he said. “People who have occupations or hobbies that put them in potential contact with wildlife should avoid any close contact with armadillos. There’s also a discussion of whether [the spike in leprosy cases] may have to do with climate change. That is not yet confirmed. It’s not entirely clear why there’s been a recent rise. It remains an area of investigation.”
Meanwhile, clinicians should keep a high level of suspicion in patients who present with skin lesions compatible with leprosy. “These are typically discolored or numb patches on the skin,” Dr. Lucar said. “This can range from a single or a few lesions to very extensive involvement of the skin. The diminished sensation or loss of sensation within those skin patches is an important sign. There’s a loss of skin color but sometimes they can be reddish.” He emphasized that leprosy “does not spread easily from person to person; casual contact will not spread leprosy. It’s important for the public to understand that.”
Dr. Lucar reported no disclosures.
, according to Jose A. Lucar, MD.
“Contrary to historical beliefs, leprosy is not highly contagious,” Dr. Lucar, an infectious disease physician and associate professor of medicine at George Washington University, Washington, said in an interview. “For reasons that have to do with the makeup of genes that affect their immune system, most people are not susceptible to acquire leprosy. It’s really a small percentage of the population. It does require prolonged contact with someone with untreated leprosy – over several months – to acquire an infection. So, the risk from any type of casual contact is low.”
According to a research letter published in the CDC’s Emerging Infectious Diseases, the number of reported leprosy cases has more than doubled in the past decade. Of the 159 new cases reported nationwide in 2020, Florida accounted for about one-fifth of cases, with most limited to the central part of the state. “In the U.S., there have been 150-250 cases reported each year over the past several years,” said Dr. Lucar, who was not affiliated with the research letter. “What seems to have changed is that since 2015, there has been a rise in cases in people who are U.S.-born “In the U.S., there have been 150-250 cases reported each year over the past several years,” said Dr. Lucar, who was not affiliated with the research letter. “What seems to have changed is that since 2015, there has been a rise in cases in people who are U.S.-born," and currently, about one-third of leprosy cases are in individuals born in the United States, he noted.
The research letter described a case of leprosy in a 54-year-old man who worked in landscaping, who sought treatment at a dermatology clinic in Central Florida in 2022 for a painful and progressive erythematous rash. The lesions began on his distal extensor extremities and progressed to involve his trunk and face. According to the report, the man denied any domestic or foreign travel, exposure to armadillos (a known source of transmission), prolonged contact with immigrants from leprosy-endemic countries, or connections with someone known to have leprosy. The authors concluded that the case “adds to the growing body of literature suggesting that central Florida represents an endemic location for leprosy. Travel to this area, even in the absence of other risk factors, should prompt consideration of leprosy in the appropriate clinical context.”
Dr. Lucar said that the mechanism of leprosy transmission is not fully understood, but armadillos, which typically traverse the southern United States, are naturally infected with the bacteria that causes leprosy. “It’s possible that they can spread it to people,” he said. “People who have occupations or hobbies that put them in potential contact with wildlife should avoid any close contact with armadillos. There’s also a discussion of whether [the spike in leprosy cases] may have to do with climate change. That is not yet confirmed. It’s not entirely clear why there’s been a recent rise. It remains an area of investigation.”
Meanwhile, clinicians should keep a high level of suspicion in patients who present with skin lesions compatible with leprosy. “These are typically discolored or numb patches on the skin,” Dr. Lucar said. “This can range from a single or a few lesions to very extensive involvement of the skin. The diminished sensation or loss of sensation within those skin patches is an important sign. There’s a loss of skin color but sometimes they can be reddish.” He emphasized that leprosy “does not spread easily from person to person; casual contact will not spread leprosy. It’s important for the public to understand that.”
Dr. Lucar reported no disclosures.
, according to Jose A. Lucar, MD.
“Contrary to historical beliefs, leprosy is not highly contagious,” Dr. Lucar, an infectious disease physician and associate professor of medicine at George Washington University, Washington, said in an interview. “For reasons that have to do with the makeup of genes that affect their immune system, most people are not susceptible to acquire leprosy. It’s really a small percentage of the population. It does require prolonged contact with someone with untreated leprosy – over several months – to acquire an infection. So, the risk from any type of casual contact is low.”
According to a research letter published in the CDC’s Emerging Infectious Diseases, the number of reported leprosy cases has more than doubled in the past decade. Of the 159 new cases reported nationwide in 2020, Florida accounted for about one-fifth of cases, with most limited to the central part of the state. “In the U.S., there have been 150-250 cases reported each year over the past several years,” said Dr. Lucar, who was not affiliated with the research letter. “What seems to have changed is that since 2015, there has been a rise in cases in people who are U.S.-born “In the U.S., there have been 150-250 cases reported each year over the past several years,” said Dr. Lucar, who was not affiliated with the research letter. “What seems to have changed is that since 2015, there has been a rise in cases in people who are U.S.-born," and currently, about one-third of leprosy cases are in individuals born in the United States, he noted.
The research letter described a case of leprosy in a 54-year-old man who worked in landscaping, who sought treatment at a dermatology clinic in Central Florida in 2022 for a painful and progressive erythematous rash. The lesions began on his distal extensor extremities and progressed to involve his trunk and face. According to the report, the man denied any domestic or foreign travel, exposure to armadillos (a known source of transmission), prolonged contact with immigrants from leprosy-endemic countries, or connections with someone known to have leprosy. The authors concluded that the case “adds to the growing body of literature suggesting that central Florida represents an endemic location for leprosy. Travel to this area, even in the absence of other risk factors, should prompt consideration of leprosy in the appropriate clinical context.”
Dr. Lucar said that the mechanism of leprosy transmission is not fully understood, but armadillos, which typically traverse the southern United States, are naturally infected with the bacteria that causes leprosy. “It’s possible that they can spread it to people,” he said. “People who have occupations or hobbies that put them in potential contact with wildlife should avoid any close contact with armadillos. There’s also a discussion of whether [the spike in leprosy cases] may have to do with climate change. That is not yet confirmed. It’s not entirely clear why there’s been a recent rise. It remains an area of investigation.”
Meanwhile, clinicians should keep a high level of suspicion in patients who present with skin lesions compatible with leprosy. “These are typically discolored or numb patches on the skin,” Dr. Lucar said. “This can range from a single or a few lesions to very extensive involvement of the skin. The diminished sensation or loss of sensation within those skin patches is an important sign. There’s a loss of skin color but sometimes they can be reddish.” He emphasized that leprosy “does not spread easily from person to person; casual contact will not spread leprosy. It’s important for the public to understand that.”
Dr. Lucar reported no disclosures.
Study highlights diagnostic challenges of differentiating lichen sclerosus from vitiligo
of cases.
Researchers who tallied symptoms and physical exam findings observed fewer statistically significant differences between LS and vitiligo patients than expected, and LS and vitiligo were sometimes misdiagnosed as each other.
“LS must be treated aggressively to prevent long-term sequelae such as permanent scarring and vulvar squamous cell carcinoma, making an accurate diagnosis crucial,” the authors write in a poster they presented at the annual meeting of the Society for Pediatric Dermatology.
LS is symptomatic and has multiple exam findings, but once treated or quiescent, the discoloration can persist and create diagnostic uncertainty, lead study author Kaiane Habeshian, MD, a pediatric dermatologist at Children’s National Hospital, Washington, told this news organization following the SPD meeting.
The diagnostic uncertainty is especially true in patients with darker skin tones, who may have vitiligoid LS, an LS variant that has overlapping features of both LS and vitiligo.
Vitiligoid LS “presents clinically as a depigmented symmetric white vulvar and perianal white patch, often with minimal signs of inflammation, but is symptomatic and appears consistent with LS on histopathology,” Dr. Habeshian said.
“In our experience, in patients with medium to dark skin tones, there is a variable amount of repigmentation after treating LS,” she added. “After use of high potency topical corticosteroids, some patients almost completely repigment, while others have minimal repigmentation, and this can fluctuate over time, sometimes independent of other signs or symptoms of a flare up. This can lead to diagnostic confusion. For example, if an LS patient is examined after treatment, and their symptoms have resolved, they may subsequently be given a diagnosis of vitiligo.”
In the study, Dr. Habeshian and her coauthors aimed to characterize differences in LS and vitiligo based on history, physical exam, and demographic findings at the time of the initial clinic visit. She and her colleagues extracted and reviewed the medical records of 98 patients with a diagnosis of LS or vitiligo who were seen at a joint pediatric dermatology-gynecology vulvar clinic over 6.8 years. The median and mean age of the study population at diagnosis was about 6 years, with ages ranging from 2 to 20. The team used descriptive statistics and Z tests for data analysis.
The researchers found that pruritus, constipation, and dysuria were the most common symptoms experienced by both LS and vitiligo patients. All were experienced more frequently by LS patients, but only pruritus reached statistical significance (P = .040). Other symptoms experienced only by LS patients included vulvar pain, bleeding, and pain with defecation.
Meanwhile, apart from hypopigmentation and erythema, all physical exam findings were more frequent in LS patients, compared with vitiligo patients, including fissures and purpura/petechiae, but only epidermal atrophy and figure-of-8 distribution of hypopigmentation reached statistical significance (P values of .047 and .036, respectively).
In other findings, LS and vitiligo were misdiagnosed as each other 15 times. Nearly half of the misdiagnoses (46.7%) were made in Black patients, who composed 38.8% of all patients in the study.
“I suspect that some vitiligo cases that were previously ‘misdiagnosed’ as LS were actually LS that just didn’t repigment and then were labeled as vitiligo in the chart,” Dr. Habeshian said.
“And some of those LS cases that previously were misdiagnosed as vitiligo likely had other more subtle LS findings that were missed (shininess and wrinkling of the skin, small fissures, constipation) or that were attributed to comorbid irritant contact dermatitis or another condition,” she said. “It was interesting to see that even in a vulvar dermatology clinic there can be confusion between these diagnoses because the literature on pediatric LS in darker skin tones is so sparse.”
She emphasized that a close exam and detailed history are needed to properly diagnose patients with anogenital skin conditions.
“Don’t forget to ask about constipation and urinary symptoms as well as psychosocial and, in the appropriate patient, sexual and reproductive function,” Dr. Habeshian said. “Based on my experience, pediatric LS is much more common in our community than the literature would suggest. Its psychosocial impact is tremendous but not well documented, particularly in pediatric patients. In my experience, the longer LS is misdiagnosed or mistreated, the more challenging it becomes to manage. You don’t want to miss LS.”
She acknowledged certain limitations of the study, including the fact that photographs were not available for review for many of the earlier years of the clinic. “Therefore, we had to depend on the diagnosis given at the time of the visit,” she said. “This likely accounts in part for the smaller number than expected of significant exam and history findings between LS and vitiligo. We need further studies utilizing a standardized approach to accurate diagnosis.”
Her coauthors were Nikita Menta, Aneka Khilnani, MS, and Tazim Dowlut-McElroy, MD. The researchers reported having no financial disclosures.
of cases.
Researchers who tallied symptoms and physical exam findings observed fewer statistically significant differences between LS and vitiligo patients than expected, and LS and vitiligo were sometimes misdiagnosed as each other.
“LS must be treated aggressively to prevent long-term sequelae such as permanent scarring and vulvar squamous cell carcinoma, making an accurate diagnosis crucial,” the authors write in a poster they presented at the annual meeting of the Society for Pediatric Dermatology.
LS is symptomatic and has multiple exam findings, but once treated or quiescent, the discoloration can persist and create diagnostic uncertainty, lead study author Kaiane Habeshian, MD, a pediatric dermatologist at Children’s National Hospital, Washington, told this news organization following the SPD meeting.
The diagnostic uncertainty is especially true in patients with darker skin tones, who may have vitiligoid LS, an LS variant that has overlapping features of both LS and vitiligo.
Vitiligoid LS “presents clinically as a depigmented symmetric white vulvar and perianal white patch, often with minimal signs of inflammation, but is symptomatic and appears consistent with LS on histopathology,” Dr. Habeshian said.
“In our experience, in patients with medium to dark skin tones, there is a variable amount of repigmentation after treating LS,” she added. “After use of high potency topical corticosteroids, some patients almost completely repigment, while others have minimal repigmentation, and this can fluctuate over time, sometimes independent of other signs or symptoms of a flare up. This can lead to diagnostic confusion. For example, if an LS patient is examined after treatment, and their symptoms have resolved, they may subsequently be given a diagnosis of vitiligo.”
In the study, Dr. Habeshian and her coauthors aimed to characterize differences in LS and vitiligo based on history, physical exam, and demographic findings at the time of the initial clinic visit. She and her colleagues extracted and reviewed the medical records of 98 patients with a diagnosis of LS or vitiligo who were seen at a joint pediatric dermatology-gynecology vulvar clinic over 6.8 years. The median and mean age of the study population at diagnosis was about 6 years, with ages ranging from 2 to 20. The team used descriptive statistics and Z tests for data analysis.
The researchers found that pruritus, constipation, and dysuria were the most common symptoms experienced by both LS and vitiligo patients. All were experienced more frequently by LS patients, but only pruritus reached statistical significance (P = .040). Other symptoms experienced only by LS patients included vulvar pain, bleeding, and pain with defecation.
Meanwhile, apart from hypopigmentation and erythema, all physical exam findings were more frequent in LS patients, compared with vitiligo patients, including fissures and purpura/petechiae, but only epidermal atrophy and figure-of-8 distribution of hypopigmentation reached statistical significance (P values of .047 and .036, respectively).
In other findings, LS and vitiligo were misdiagnosed as each other 15 times. Nearly half of the misdiagnoses (46.7%) were made in Black patients, who composed 38.8% of all patients in the study.
“I suspect that some vitiligo cases that were previously ‘misdiagnosed’ as LS were actually LS that just didn’t repigment and then were labeled as vitiligo in the chart,” Dr. Habeshian said.
“And some of those LS cases that previously were misdiagnosed as vitiligo likely had other more subtle LS findings that were missed (shininess and wrinkling of the skin, small fissures, constipation) or that were attributed to comorbid irritant contact dermatitis or another condition,” she said. “It was interesting to see that even in a vulvar dermatology clinic there can be confusion between these diagnoses because the literature on pediatric LS in darker skin tones is so sparse.”
She emphasized that a close exam and detailed history are needed to properly diagnose patients with anogenital skin conditions.
“Don’t forget to ask about constipation and urinary symptoms as well as psychosocial and, in the appropriate patient, sexual and reproductive function,” Dr. Habeshian said. “Based on my experience, pediatric LS is much more common in our community than the literature would suggest. Its psychosocial impact is tremendous but not well documented, particularly in pediatric patients. In my experience, the longer LS is misdiagnosed or mistreated, the more challenging it becomes to manage. You don’t want to miss LS.”
She acknowledged certain limitations of the study, including the fact that photographs were not available for review for many of the earlier years of the clinic. “Therefore, we had to depend on the diagnosis given at the time of the visit,” she said. “This likely accounts in part for the smaller number than expected of significant exam and history findings between LS and vitiligo. We need further studies utilizing a standardized approach to accurate diagnosis.”
Her coauthors were Nikita Menta, Aneka Khilnani, MS, and Tazim Dowlut-McElroy, MD. The researchers reported having no financial disclosures.
of cases.
Researchers who tallied symptoms and physical exam findings observed fewer statistically significant differences between LS and vitiligo patients than expected, and LS and vitiligo were sometimes misdiagnosed as each other.
“LS must be treated aggressively to prevent long-term sequelae such as permanent scarring and vulvar squamous cell carcinoma, making an accurate diagnosis crucial,” the authors write in a poster they presented at the annual meeting of the Society for Pediatric Dermatology.
LS is symptomatic and has multiple exam findings, but once treated or quiescent, the discoloration can persist and create diagnostic uncertainty, lead study author Kaiane Habeshian, MD, a pediatric dermatologist at Children’s National Hospital, Washington, told this news organization following the SPD meeting.
The diagnostic uncertainty is especially true in patients with darker skin tones, who may have vitiligoid LS, an LS variant that has overlapping features of both LS and vitiligo.
Vitiligoid LS “presents clinically as a depigmented symmetric white vulvar and perianal white patch, often with minimal signs of inflammation, but is symptomatic and appears consistent with LS on histopathology,” Dr. Habeshian said.
“In our experience, in patients with medium to dark skin tones, there is a variable amount of repigmentation after treating LS,” she added. “After use of high potency topical corticosteroids, some patients almost completely repigment, while others have minimal repigmentation, and this can fluctuate over time, sometimes independent of other signs or symptoms of a flare up. This can lead to diagnostic confusion. For example, if an LS patient is examined after treatment, and their symptoms have resolved, they may subsequently be given a diagnosis of vitiligo.”
In the study, Dr. Habeshian and her coauthors aimed to characterize differences in LS and vitiligo based on history, physical exam, and demographic findings at the time of the initial clinic visit. She and her colleagues extracted and reviewed the medical records of 98 patients with a diagnosis of LS or vitiligo who were seen at a joint pediatric dermatology-gynecology vulvar clinic over 6.8 years. The median and mean age of the study population at diagnosis was about 6 years, with ages ranging from 2 to 20. The team used descriptive statistics and Z tests for data analysis.
The researchers found that pruritus, constipation, and dysuria were the most common symptoms experienced by both LS and vitiligo patients. All were experienced more frequently by LS patients, but only pruritus reached statistical significance (P = .040). Other symptoms experienced only by LS patients included vulvar pain, bleeding, and pain with defecation.
Meanwhile, apart from hypopigmentation and erythema, all physical exam findings were more frequent in LS patients, compared with vitiligo patients, including fissures and purpura/petechiae, but only epidermal atrophy and figure-of-8 distribution of hypopigmentation reached statistical significance (P values of .047 and .036, respectively).
In other findings, LS and vitiligo were misdiagnosed as each other 15 times. Nearly half of the misdiagnoses (46.7%) were made in Black patients, who composed 38.8% of all patients in the study.
“I suspect that some vitiligo cases that were previously ‘misdiagnosed’ as LS were actually LS that just didn’t repigment and then were labeled as vitiligo in the chart,” Dr. Habeshian said.
“And some of those LS cases that previously were misdiagnosed as vitiligo likely had other more subtle LS findings that were missed (shininess and wrinkling of the skin, small fissures, constipation) or that were attributed to comorbid irritant contact dermatitis or another condition,” she said. “It was interesting to see that even in a vulvar dermatology clinic there can be confusion between these diagnoses because the literature on pediatric LS in darker skin tones is so sparse.”
She emphasized that a close exam and detailed history are needed to properly diagnose patients with anogenital skin conditions.
“Don’t forget to ask about constipation and urinary symptoms as well as psychosocial and, in the appropriate patient, sexual and reproductive function,” Dr. Habeshian said. “Based on my experience, pediatric LS is much more common in our community than the literature would suggest. Its psychosocial impact is tremendous but not well documented, particularly in pediatric patients. In my experience, the longer LS is misdiagnosed or mistreated, the more challenging it becomes to manage. You don’t want to miss LS.”
She acknowledged certain limitations of the study, including the fact that photographs were not available for review for many of the earlier years of the clinic. “Therefore, we had to depend on the diagnosis given at the time of the visit,” she said. “This likely accounts in part for the smaller number than expected of significant exam and history findings between LS and vitiligo. We need further studies utilizing a standardized approach to accurate diagnosis.”
Her coauthors were Nikita Menta, Aneka Khilnani, MS, and Tazim Dowlut-McElroy, MD. The researchers reported having no financial disclosures.
FROM SPD 2023
U.S. has new dominant COVID variant called EG.5
Called “Eris” among avid COVID trackers, the strain EG.5 now accounts for 17% of all U.S. COVID infections, according to the latest Centers for Disease Control and Prevention estimates. That’s up from 12% the week prior.
EG.5 has been rising worldwide, just weeks after the World Health Organization added the strain to its official monitoring list. In the United Kingdom, it now accounts for 1 in 10 COVID cases, The Independent reported.
EG.5 is a descendant of the XBB strains that have dominated tracking lists in recent months. It has the same makeup as XBB.1.9.2 but carries an extra spike mutation, according to a summary published by the Center for Infectious Disease Research and Policy at the University of Minnesota. The spike protein is the part of the virus that allows it to enter human cells. But there’s no indication so far that EG.5 is more contagious or severe than other recent variants, according to the CIDRAP summary and a recent podcast from the American Medical Association. The CDC said that current vaccines protect against the variant.
U.S. hospitals saw a 12% increase in COVID admissions during the week ending on July 22, with 8,047 people being admitted because of the virus, up from an all-time low of 6,306 the week of June 24. In 17 states, the past-week increase in hospitalizations was 20% or greater. In Minnesota, the rate jumped by 50%, and in West Virginia, it jumped by 63%. Meanwhile, deaths reached their lowest weekly rate ever for the week of data ending July 29, with just 176 deaths reported by the CDC.
A version of this article first appeared on WebMD.com.
Called “Eris” among avid COVID trackers, the strain EG.5 now accounts for 17% of all U.S. COVID infections, according to the latest Centers for Disease Control and Prevention estimates. That’s up from 12% the week prior.
EG.5 has been rising worldwide, just weeks after the World Health Organization added the strain to its official monitoring list. In the United Kingdom, it now accounts for 1 in 10 COVID cases, The Independent reported.
EG.5 is a descendant of the XBB strains that have dominated tracking lists in recent months. It has the same makeup as XBB.1.9.2 but carries an extra spike mutation, according to a summary published by the Center for Infectious Disease Research and Policy at the University of Minnesota. The spike protein is the part of the virus that allows it to enter human cells. But there’s no indication so far that EG.5 is more contagious or severe than other recent variants, according to the CIDRAP summary and a recent podcast from the American Medical Association. The CDC said that current vaccines protect against the variant.
U.S. hospitals saw a 12% increase in COVID admissions during the week ending on July 22, with 8,047 people being admitted because of the virus, up from an all-time low of 6,306 the week of June 24. In 17 states, the past-week increase in hospitalizations was 20% or greater. In Minnesota, the rate jumped by 50%, and in West Virginia, it jumped by 63%. Meanwhile, deaths reached their lowest weekly rate ever for the week of data ending July 29, with just 176 deaths reported by the CDC.
A version of this article first appeared on WebMD.com.
Called “Eris” among avid COVID trackers, the strain EG.5 now accounts for 17% of all U.S. COVID infections, according to the latest Centers for Disease Control and Prevention estimates. That’s up from 12% the week prior.
EG.5 has been rising worldwide, just weeks after the World Health Organization added the strain to its official monitoring list. In the United Kingdom, it now accounts for 1 in 10 COVID cases, The Independent reported.
EG.5 is a descendant of the XBB strains that have dominated tracking lists in recent months. It has the same makeup as XBB.1.9.2 but carries an extra spike mutation, according to a summary published by the Center for Infectious Disease Research and Policy at the University of Minnesota. The spike protein is the part of the virus that allows it to enter human cells. But there’s no indication so far that EG.5 is more contagious or severe than other recent variants, according to the CIDRAP summary and a recent podcast from the American Medical Association. The CDC said that current vaccines protect against the variant.
U.S. hospitals saw a 12% increase in COVID admissions during the week ending on July 22, with 8,047 people being admitted because of the virus, up from an all-time low of 6,306 the week of June 24. In 17 states, the past-week increase in hospitalizations was 20% or greater. In Minnesota, the rate jumped by 50%, and in West Virginia, it jumped by 63%. Meanwhile, deaths reached their lowest weekly rate ever for the week of data ending July 29, with just 176 deaths reported by the CDC.
A version of this article first appeared on WebMD.com.
Early-life antibiotic use may raise risk of early-onset CRC
TOPLINE:
, particularly in people with a variant in a specific gut microbiota regulatory gene, a new analysis found.
METHODOLOGY:
- Researchers analyzed data from UK Biobank participants who were recruited between 2006 and 2010 and were followed up to February 2022.
- They evaluated associations between early-life factors and early-onset CRC risk overall, focusing on long-term and recurrent antibiotic use.
- The team also estimated associations between long-term and recurrent antibiotic use in early life and CRC risk by polygenic risk score using 127 CRC-related genetic variants, as well as a particular gut microbiota regulatory gene FUT2.
- Associations for early-onset colorectal adenomas, as precursor to CRC, were also evaluated.
- The study included 113,256 participants. There were 165 early-onset CRC cases and 719 early-onset adenoma cases.
TAKEAWAY:
- Early-life, long-term, and recurrent antibiotic use was “nominally” associated with an increased risk of early-onset CRC (odds ratio, 1.48; P = .046) and adenomas (OR, 1.40; P < .001).
- Regarding variants of FUT2, the risk of early-onset CRC appeared to be greater for individuals with the rs281377 TT genotype (OR, 2.74) in comparison with those with the CT and TT genotypes, but none of the estimates reached statistical significance.
- The researchers found a strong positive association between long-term and recurrent antibiotic use and adenomas, largely in patients with rs281377 TT (OR, 1.75) and CT genotypes (OR, 1.51).
- Individuals with a high polygenic risk score were at higher risk of early-onset CRC (OR, 1.72; P = .019), while those with low polygenic risk scores were not at higher risk (OR, 1.05; P = .889). The association between antibiotic use and early-onset CRC risk by family history was also higher (OR, 2.34).
IN PRACTICE:
“Our findings suggested that individuals with genetic risk factors (i.e., family history of CRC) who have experienced early-life antibiotics use on a long-term basis are probably at increased early-onset CRC risk,” the authors concluded. “Given that antibiotics remain valuable in the management of bacterial infections during early life, investigating the pros and cons of early-life antibiotic use is of great significance.”
SOURCE:
The study, led by Fangyuan Jiang, with Zhejiang University, Hangzhou, China, was published online in the International Journal of Cancer.
LIMITATIONS:
The study relied on participants’ recall of early-life antibiotics use, which could introduce recall bias and misclassification of this exposure.
DISCLOSURES:
No conflicts of interest were reported.
A version of this article first appeared on Medscape.com.
TOPLINE:
, particularly in people with a variant in a specific gut microbiota regulatory gene, a new analysis found.
METHODOLOGY:
- Researchers analyzed data from UK Biobank participants who were recruited between 2006 and 2010 and were followed up to February 2022.
- They evaluated associations between early-life factors and early-onset CRC risk overall, focusing on long-term and recurrent antibiotic use.
- The team also estimated associations between long-term and recurrent antibiotic use in early life and CRC risk by polygenic risk score using 127 CRC-related genetic variants, as well as a particular gut microbiota regulatory gene FUT2.
- Associations for early-onset colorectal adenomas, as precursor to CRC, were also evaluated.
- The study included 113,256 participants. There were 165 early-onset CRC cases and 719 early-onset adenoma cases.
TAKEAWAY:
- Early-life, long-term, and recurrent antibiotic use was “nominally” associated with an increased risk of early-onset CRC (odds ratio, 1.48; P = .046) and adenomas (OR, 1.40; P < .001).
- Regarding variants of FUT2, the risk of early-onset CRC appeared to be greater for individuals with the rs281377 TT genotype (OR, 2.74) in comparison with those with the CT and TT genotypes, but none of the estimates reached statistical significance.
- The researchers found a strong positive association between long-term and recurrent antibiotic use and adenomas, largely in patients with rs281377 TT (OR, 1.75) and CT genotypes (OR, 1.51).
- Individuals with a high polygenic risk score were at higher risk of early-onset CRC (OR, 1.72; P = .019), while those with low polygenic risk scores were not at higher risk (OR, 1.05; P = .889). The association between antibiotic use and early-onset CRC risk by family history was also higher (OR, 2.34).
IN PRACTICE:
“Our findings suggested that individuals with genetic risk factors (i.e., family history of CRC) who have experienced early-life antibiotics use on a long-term basis are probably at increased early-onset CRC risk,” the authors concluded. “Given that antibiotics remain valuable in the management of bacterial infections during early life, investigating the pros and cons of early-life antibiotic use is of great significance.”
SOURCE:
The study, led by Fangyuan Jiang, with Zhejiang University, Hangzhou, China, was published online in the International Journal of Cancer.
LIMITATIONS:
The study relied on participants’ recall of early-life antibiotics use, which could introduce recall bias and misclassification of this exposure.
DISCLOSURES:
No conflicts of interest were reported.
A version of this article first appeared on Medscape.com.
TOPLINE:
, particularly in people with a variant in a specific gut microbiota regulatory gene, a new analysis found.
METHODOLOGY:
- Researchers analyzed data from UK Biobank participants who were recruited between 2006 and 2010 and were followed up to February 2022.
- They evaluated associations between early-life factors and early-onset CRC risk overall, focusing on long-term and recurrent antibiotic use.
- The team also estimated associations between long-term and recurrent antibiotic use in early life and CRC risk by polygenic risk score using 127 CRC-related genetic variants, as well as a particular gut microbiota regulatory gene FUT2.
- Associations for early-onset colorectal adenomas, as precursor to CRC, were also evaluated.
- The study included 113,256 participants. There were 165 early-onset CRC cases and 719 early-onset adenoma cases.
TAKEAWAY:
- Early-life, long-term, and recurrent antibiotic use was “nominally” associated with an increased risk of early-onset CRC (odds ratio, 1.48; P = .046) and adenomas (OR, 1.40; P < .001).
- Regarding variants of FUT2, the risk of early-onset CRC appeared to be greater for individuals with the rs281377 TT genotype (OR, 2.74) in comparison with those with the CT and TT genotypes, but none of the estimates reached statistical significance.
- The researchers found a strong positive association between long-term and recurrent antibiotic use and adenomas, largely in patients with rs281377 TT (OR, 1.75) and CT genotypes (OR, 1.51).
- Individuals with a high polygenic risk score were at higher risk of early-onset CRC (OR, 1.72; P = .019), while those with low polygenic risk scores were not at higher risk (OR, 1.05; P = .889). The association between antibiotic use and early-onset CRC risk by family history was also higher (OR, 2.34).
IN PRACTICE:
“Our findings suggested that individuals with genetic risk factors (i.e., family history of CRC) who have experienced early-life antibiotics use on a long-term basis are probably at increased early-onset CRC risk,” the authors concluded. “Given that antibiotics remain valuable in the management of bacterial infections during early life, investigating the pros and cons of early-life antibiotic use is of great significance.”
SOURCE:
The study, led by Fangyuan Jiang, with Zhejiang University, Hangzhou, China, was published online in the International Journal of Cancer.
LIMITATIONS:
The study relied on participants’ recall of early-life antibiotics use, which could introduce recall bias and misclassification of this exposure.
DISCLOSURES:
No conflicts of interest were reported.
A version of this article first appeared on Medscape.com.
FROM INTERNATIONAL JOURNAL OF CANCER
OxyContin marketing push still exacting a deadly toll, study says
The uptick in rates of infectious diseases, namely, hepatitis and infective endocarditis, occurred after 2010, when OxyContin maker Purdue Pharma reformulated OxyContin to make it harder to crush and snort. This led many people who were already addicted to the powerful pain pills to move on to injecting heroin or fentanyl, which fueled the spread of infectious disease.
“Our results suggest that the mortality and morbidity consequences of OxyContin marketing continue to be salient more than 25 years later,” write Julia Dennett, PhD, and Gregg Gonsalves, PhD, with Yale University School of Public Health, New Haven, Conn.
Their study was published online in Health Affairs.
Long-term effects revealed
Until now, the long-term effects of widespread OxyContin marketing with regard to complications of injection drug use were unknown.
Dr. Dennett and Dr. Gonsalves evaluated the effects of OxyContin marketing on the long-term trajectories of various injection drug use–related outcomes. Using a difference-in-difference analysis, they compared states with high vs. low exposure to OxyContin marketing before and after the 2010 reformulation of the drug.
Before 2010, rates of infections associated with injection drug use and overdose deaths were similar in high- and low-marketing states, they found.
Those rates diverged after the 2010 reformulation, with more infections related to injection drug use in states exposed to more marketing.
Specifically, from 2010 until 2020, high-exposure states saw, on average, an additional 0.85 acute hepatitis B cases, 0.83 hepatitis C cases, and 0.62 cases of death from infective endocarditis per 100,000 residents.
High-exposure states also had 5.3 more deaths per 100,000 residents from synthetic opioid overdose.
“Prior to 2010, among these states, there were generally no statistically significant differences in these outcomes. After 2010, you saw them diverge dramatically,” Dr. Dennett said in a news release.
Dr. Dennett and Dr. Gonsalves say their findings support the view that the opioid epidemic is creating a converging public health crisis, as it is fueling a surge in infectious diseases, particularly hepatitis, infective endocarditis, and HIV.
“This study highlights a critical need for actions to address the spread of viral and bacterial infections and overdose associated with injection drug use, both in the states that were subject to Purdue’s promotional campaign and across the U.S. more broadly,” they add.
Purdue Pharma did not provide a comment on the study.
Funding for the study was provided by the National Institute on Drug Abuse. Disclosures for Dr. Dennett and Dr. Gonsalves were not available.
A version of this article first appeared on Medscape.com.
The uptick in rates of infectious diseases, namely, hepatitis and infective endocarditis, occurred after 2010, when OxyContin maker Purdue Pharma reformulated OxyContin to make it harder to crush and snort. This led many people who were already addicted to the powerful pain pills to move on to injecting heroin or fentanyl, which fueled the spread of infectious disease.
“Our results suggest that the mortality and morbidity consequences of OxyContin marketing continue to be salient more than 25 years later,” write Julia Dennett, PhD, and Gregg Gonsalves, PhD, with Yale University School of Public Health, New Haven, Conn.
Their study was published online in Health Affairs.
Long-term effects revealed
Until now, the long-term effects of widespread OxyContin marketing with regard to complications of injection drug use were unknown.
Dr. Dennett and Dr. Gonsalves evaluated the effects of OxyContin marketing on the long-term trajectories of various injection drug use–related outcomes. Using a difference-in-difference analysis, they compared states with high vs. low exposure to OxyContin marketing before and after the 2010 reformulation of the drug.
Before 2010, rates of infections associated with injection drug use and overdose deaths were similar in high- and low-marketing states, they found.
Those rates diverged after the 2010 reformulation, with more infections related to injection drug use in states exposed to more marketing.
Specifically, from 2010 until 2020, high-exposure states saw, on average, an additional 0.85 acute hepatitis B cases, 0.83 hepatitis C cases, and 0.62 cases of death from infective endocarditis per 100,000 residents.
High-exposure states also had 5.3 more deaths per 100,000 residents from synthetic opioid overdose.
“Prior to 2010, among these states, there were generally no statistically significant differences in these outcomes. After 2010, you saw them diverge dramatically,” Dr. Dennett said in a news release.
Dr. Dennett and Dr. Gonsalves say their findings support the view that the opioid epidemic is creating a converging public health crisis, as it is fueling a surge in infectious diseases, particularly hepatitis, infective endocarditis, and HIV.
“This study highlights a critical need for actions to address the spread of viral and bacterial infections and overdose associated with injection drug use, both in the states that were subject to Purdue’s promotional campaign and across the U.S. more broadly,” they add.
Purdue Pharma did not provide a comment on the study.
Funding for the study was provided by the National Institute on Drug Abuse. Disclosures for Dr. Dennett and Dr. Gonsalves were not available.
A version of this article first appeared on Medscape.com.
The uptick in rates of infectious diseases, namely, hepatitis and infective endocarditis, occurred after 2010, when OxyContin maker Purdue Pharma reformulated OxyContin to make it harder to crush and snort. This led many people who were already addicted to the powerful pain pills to move on to injecting heroin or fentanyl, which fueled the spread of infectious disease.
“Our results suggest that the mortality and morbidity consequences of OxyContin marketing continue to be salient more than 25 years later,” write Julia Dennett, PhD, and Gregg Gonsalves, PhD, with Yale University School of Public Health, New Haven, Conn.
Their study was published online in Health Affairs.
Long-term effects revealed
Until now, the long-term effects of widespread OxyContin marketing with regard to complications of injection drug use were unknown.
Dr. Dennett and Dr. Gonsalves evaluated the effects of OxyContin marketing on the long-term trajectories of various injection drug use–related outcomes. Using a difference-in-difference analysis, they compared states with high vs. low exposure to OxyContin marketing before and after the 2010 reformulation of the drug.
Before 2010, rates of infections associated with injection drug use and overdose deaths were similar in high- and low-marketing states, they found.
Those rates diverged after the 2010 reformulation, with more infections related to injection drug use in states exposed to more marketing.
Specifically, from 2010 until 2020, high-exposure states saw, on average, an additional 0.85 acute hepatitis B cases, 0.83 hepatitis C cases, and 0.62 cases of death from infective endocarditis per 100,000 residents.
High-exposure states also had 5.3 more deaths per 100,000 residents from synthetic opioid overdose.
“Prior to 2010, among these states, there were generally no statistically significant differences in these outcomes. After 2010, you saw them diverge dramatically,” Dr. Dennett said in a news release.
Dr. Dennett and Dr. Gonsalves say their findings support the view that the opioid epidemic is creating a converging public health crisis, as it is fueling a surge in infectious diseases, particularly hepatitis, infective endocarditis, and HIV.
“This study highlights a critical need for actions to address the spread of viral and bacterial infections and overdose associated with injection drug use, both in the states that were subject to Purdue’s promotional campaign and across the U.S. more broadly,” they add.
Purdue Pharma did not provide a comment on the study.
Funding for the study was provided by the National Institute on Drug Abuse. Disclosures for Dr. Dennett and Dr. Gonsalves were not available.
A version of this article first appeared on Medscape.com.
FROM HEALTH AFFAIRS
Pandemic blamed for failed trial of inhaled antibiotic
NEW YORK – When data were combined from two parallel phase 3 bronchiectasis treatment trials, inhaled colistimethate sodium failed to significantly reduce the rate of exacerbations associated with Pseudomonas aeruginosa infection, but the disparity in the findings from the two trials, presented at the 6th World Bronchiectasis & NTM Conference (WBC) 2023, strongly suggests that this therapy is effective after all.
“The totality of the evidence supports a consistent and clinically meaningful benefit [of this therapy] outside of pandemic conditions,” reported Charles Haworth, MD, director, Cambridge Centre for Lung Infection, Royal Papworth Hospital, Cambridge, England.
The key phrase is “outside of pandemic conditions.” PROMIS I, which was fully enrolled before the COVID-19 pandemic descended, associated the inhaled therapy with highly significant benefits. PROMIS II, which was initiated later and enrolled 40% of its participants during the pandemic, did not.
The difference between these two trials, which were essentially identical, was the timing, according to Dr. Haworth. By starting later, PROMIS II caught the onset of the pandemic, which he believes introduced numerous problems that defeated the opportunity to show an advantage for the inhaled antibiotic.
Injectable colistimethate sodium, a decades-old formulation of colistin, is already approved in the United States for gram-negative infections and is considered helpful even in challenging diseases, such as cystic fibrosis. Positive results from a phase 2 trial with inhaled colistimethate sodium in bronchiectasis patients with P. aeruginosa infection provided the rationale for the phase 3 PROMIS program.
The key entry criterion of PROMIS I and PROMIS II, each with nearly 90 participating study sites, was a history of bronchiectasis and ≥ two P. aeruginosa infections requiring oral therapy or ≥ 1 infection requiring intravenous therapy in the prior 12 months. Patients were randomly assigned to receive colistimethate sodium delivered in the proprietary I-neb nebulizer (CMS I-neb) or a matching placebo.
On the primary endpoint of annualized rate of exacerbations, the figures per year were 0.58 for CMS I-neb and 0.95 for placebo in the PROMIS I trial. This produced a rate ratio of 0.65, signaling a significant 35% (P = .00101) reduction in risk. In PROMIS II, the annualized rates of exacerbation were essentially identical in the experimental and control arms (0.089 vs. 0.088; P = .97).
With “no signal of benefit” in the PROMIS II trial, the numerical advantage of CMS I-neb for the combined data did not reach statistical significance, Dr. Haworth reported.
Other endpoints told the same story. For example, the time to first exacerbation was reduced by 41% in PROMIS I (HR, 0.59; P = .0074) but was not reduced significantly (P = .603) in PROMIS II. In PROMIS I, there was a nearly 60% reduction in the risk of severe exacerbations associated with CMS I-neb, but the risk ratio of severe infections was slightly but not significantly higher on CMS I-neb in PROMIS II.
There were signals of benefit in PROMIS II. For example, the reductions in P. aeruginosa density were similar in the two studies (P < .00001 in both), and assessment with the Severe Exacerbations and Quality of Life (SQOL) tool associated CMS I-neb with end-of-study improvement in QOL for the experimental arm in both studies.
While Dr. Haworth acknowledged that he recognizes the “issues of post hoc analysis with any data,” obscuring a benefit that would have been otherwise shown.
Besides the dramatic reduction in rates of hospitalization during the pandemic, an obstacle for showing differences in exacerbations, and other COVID-related factors with the potential to skew results, Dr. Haworth also provided several sets of objective data to make his point.
Most importantly, Dr. Haworth and his coinvestigators conducted a meta-analysis that combined data from the phase 2 trial, data from PROMIS I, and data from the patients enrolled in PROMIS II prior to the COVID pandemic. In this analysis the rate ratio for annualized exacerbations was a “pretty impressive” 0.65 favoring CMS I-neb. Moreover, in contrast to data from the PROMIS II patients enrolled during the COVID pandemic, the other three sets of data were “remarkably consistent.”
If PROMIS II data collected from patients enrolled during COVID are compared with the other sets of data, they are “the clear outlier,” he asserted.
Many guidelines in Europe, including those from the European Respiratory Society and the British Thoracic Society, already recommend inhaled colistin in patients with bronchiectasis for the treatment of P. aeruginosa. Although Dr. Haworth believes that the preponderance of controlled data now argue that CMS I-neb is effective as well as safe (adverse events in the experimental and placebo arms of PROMIS I and II were similar), he is not sure what steps will be taken to confirm a benefit to regulatory authorities. According to Dr. Haworth, there are no approved inhaled antibiotics in the United States.
Referring to Zambon, which funded the trials and is developing CMS I-neb, Dr. Haworth said, “This will be a company decision. There are some logistical hurdles to doing another trial.”
Not least of these hurdles is that clinicians and patients already consider inhalational antibiotics in general and inhaled colistin specifically to be effective for several types of infections, including P. aeruginosa, according to Eva Polverino, MD, PhD, a pulmonologist associated with the Hospital Clinic of Barcelona. She said that these drugs are already a standard of care in her own country as well as in many other countries in Europe.
“There has been a loss of equipoise needed to conduct a randomized placebo-controlled trial,” Dr. Polverino said. In her opinion, the U.S. FDA “should start thinking of other pathways to approval.” She thinks that enrollment in a placebo-controlled trial is no longer appropriate.
Dr. Haworth and Dr. Polverino have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
NEW YORK – When data were combined from two parallel phase 3 bronchiectasis treatment trials, inhaled colistimethate sodium failed to significantly reduce the rate of exacerbations associated with Pseudomonas aeruginosa infection, but the disparity in the findings from the two trials, presented at the 6th World Bronchiectasis & NTM Conference (WBC) 2023, strongly suggests that this therapy is effective after all.
“The totality of the evidence supports a consistent and clinically meaningful benefit [of this therapy] outside of pandemic conditions,” reported Charles Haworth, MD, director, Cambridge Centre for Lung Infection, Royal Papworth Hospital, Cambridge, England.
The key phrase is “outside of pandemic conditions.” PROMIS I, which was fully enrolled before the COVID-19 pandemic descended, associated the inhaled therapy with highly significant benefits. PROMIS II, which was initiated later and enrolled 40% of its participants during the pandemic, did not.
The difference between these two trials, which were essentially identical, was the timing, according to Dr. Haworth. By starting later, PROMIS II caught the onset of the pandemic, which he believes introduced numerous problems that defeated the opportunity to show an advantage for the inhaled antibiotic.
Injectable colistimethate sodium, a decades-old formulation of colistin, is already approved in the United States for gram-negative infections and is considered helpful even in challenging diseases, such as cystic fibrosis. Positive results from a phase 2 trial with inhaled colistimethate sodium in bronchiectasis patients with P. aeruginosa infection provided the rationale for the phase 3 PROMIS program.
The key entry criterion of PROMIS I and PROMIS II, each with nearly 90 participating study sites, was a history of bronchiectasis and ≥ two P. aeruginosa infections requiring oral therapy or ≥ 1 infection requiring intravenous therapy in the prior 12 months. Patients were randomly assigned to receive colistimethate sodium delivered in the proprietary I-neb nebulizer (CMS I-neb) or a matching placebo.
On the primary endpoint of annualized rate of exacerbations, the figures per year were 0.58 for CMS I-neb and 0.95 for placebo in the PROMIS I trial. This produced a rate ratio of 0.65, signaling a significant 35% (P = .00101) reduction in risk. In PROMIS II, the annualized rates of exacerbation were essentially identical in the experimental and control arms (0.089 vs. 0.088; P = .97).
With “no signal of benefit” in the PROMIS II trial, the numerical advantage of CMS I-neb for the combined data did not reach statistical significance, Dr. Haworth reported.
Other endpoints told the same story. For example, the time to first exacerbation was reduced by 41% in PROMIS I (HR, 0.59; P = .0074) but was not reduced significantly (P = .603) in PROMIS II. In PROMIS I, there was a nearly 60% reduction in the risk of severe exacerbations associated with CMS I-neb, but the risk ratio of severe infections was slightly but not significantly higher on CMS I-neb in PROMIS II.
There were signals of benefit in PROMIS II. For example, the reductions in P. aeruginosa density were similar in the two studies (P < .00001 in both), and assessment with the Severe Exacerbations and Quality of Life (SQOL) tool associated CMS I-neb with end-of-study improvement in QOL for the experimental arm in both studies.
While Dr. Haworth acknowledged that he recognizes the “issues of post hoc analysis with any data,” obscuring a benefit that would have been otherwise shown.
Besides the dramatic reduction in rates of hospitalization during the pandemic, an obstacle for showing differences in exacerbations, and other COVID-related factors with the potential to skew results, Dr. Haworth also provided several sets of objective data to make his point.
Most importantly, Dr. Haworth and his coinvestigators conducted a meta-analysis that combined data from the phase 2 trial, data from PROMIS I, and data from the patients enrolled in PROMIS II prior to the COVID pandemic. In this analysis the rate ratio for annualized exacerbations was a “pretty impressive” 0.65 favoring CMS I-neb. Moreover, in contrast to data from the PROMIS II patients enrolled during the COVID pandemic, the other three sets of data were “remarkably consistent.”
If PROMIS II data collected from patients enrolled during COVID are compared with the other sets of data, they are “the clear outlier,” he asserted.
Many guidelines in Europe, including those from the European Respiratory Society and the British Thoracic Society, already recommend inhaled colistin in patients with bronchiectasis for the treatment of P. aeruginosa. Although Dr. Haworth believes that the preponderance of controlled data now argue that CMS I-neb is effective as well as safe (adverse events in the experimental and placebo arms of PROMIS I and II were similar), he is not sure what steps will be taken to confirm a benefit to regulatory authorities. According to Dr. Haworth, there are no approved inhaled antibiotics in the United States.
Referring to Zambon, which funded the trials and is developing CMS I-neb, Dr. Haworth said, “This will be a company decision. There are some logistical hurdles to doing another trial.”
Not least of these hurdles is that clinicians and patients already consider inhalational antibiotics in general and inhaled colistin specifically to be effective for several types of infections, including P. aeruginosa, according to Eva Polverino, MD, PhD, a pulmonologist associated with the Hospital Clinic of Barcelona. She said that these drugs are already a standard of care in her own country as well as in many other countries in Europe.
“There has been a loss of equipoise needed to conduct a randomized placebo-controlled trial,” Dr. Polverino said. In her opinion, the U.S. FDA “should start thinking of other pathways to approval.” She thinks that enrollment in a placebo-controlled trial is no longer appropriate.
Dr. Haworth and Dr. Polverino have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
NEW YORK – When data were combined from two parallel phase 3 bronchiectasis treatment trials, inhaled colistimethate sodium failed to significantly reduce the rate of exacerbations associated with Pseudomonas aeruginosa infection, but the disparity in the findings from the two trials, presented at the 6th World Bronchiectasis & NTM Conference (WBC) 2023, strongly suggests that this therapy is effective after all.
“The totality of the evidence supports a consistent and clinically meaningful benefit [of this therapy] outside of pandemic conditions,” reported Charles Haworth, MD, director, Cambridge Centre for Lung Infection, Royal Papworth Hospital, Cambridge, England.
The key phrase is “outside of pandemic conditions.” PROMIS I, which was fully enrolled before the COVID-19 pandemic descended, associated the inhaled therapy with highly significant benefits. PROMIS II, which was initiated later and enrolled 40% of its participants during the pandemic, did not.
The difference between these two trials, which were essentially identical, was the timing, according to Dr. Haworth. By starting later, PROMIS II caught the onset of the pandemic, which he believes introduced numerous problems that defeated the opportunity to show an advantage for the inhaled antibiotic.
Injectable colistimethate sodium, a decades-old formulation of colistin, is already approved in the United States for gram-negative infections and is considered helpful even in challenging diseases, such as cystic fibrosis. Positive results from a phase 2 trial with inhaled colistimethate sodium in bronchiectasis patients with P. aeruginosa infection provided the rationale for the phase 3 PROMIS program.
The key entry criterion of PROMIS I and PROMIS II, each with nearly 90 participating study sites, was a history of bronchiectasis and ≥ two P. aeruginosa infections requiring oral therapy or ≥ 1 infection requiring intravenous therapy in the prior 12 months. Patients were randomly assigned to receive colistimethate sodium delivered in the proprietary I-neb nebulizer (CMS I-neb) or a matching placebo.
On the primary endpoint of annualized rate of exacerbations, the figures per year were 0.58 for CMS I-neb and 0.95 for placebo in the PROMIS I trial. This produced a rate ratio of 0.65, signaling a significant 35% (P = .00101) reduction in risk. In PROMIS II, the annualized rates of exacerbation were essentially identical in the experimental and control arms (0.089 vs. 0.088; P = .97).
With “no signal of benefit” in the PROMIS II trial, the numerical advantage of CMS I-neb for the combined data did not reach statistical significance, Dr. Haworth reported.
Other endpoints told the same story. For example, the time to first exacerbation was reduced by 41% in PROMIS I (HR, 0.59; P = .0074) but was not reduced significantly (P = .603) in PROMIS II. In PROMIS I, there was a nearly 60% reduction in the risk of severe exacerbations associated with CMS I-neb, but the risk ratio of severe infections was slightly but not significantly higher on CMS I-neb in PROMIS II.
There were signals of benefit in PROMIS II. For example, the reductions in P. aeruginosa density were similar in the two studies (P < .00001 in both), and assessment with the Severe Exacerbations and Quality of Life (SQOL) tool associated CMS I-neb with end-of-study improvement in QOL for the experimental arm in both studies.
While Dr. Haworth acknowledged that he recognizes the “issues of post hoc analysis with any data,” obscuring a benefit that would have been otherwise shown.
Besides the dramatic reduction in rates of hospitalization during the pandemic, an obstacle for showing differences in exacerbations, and other COVID-related factors with the potential to skew results, Dr. Haworth also provided several sets of objective data to make his point.
Most importantly, Dr. Haworth and his coinvestigators conducted a meta-analysis that combined data from the phase 2 trial, data from PROMIS I, and data from the patients enrolled in PROMIS II prior to the COVID pandemic. In this analysis the rate ratio for annualized exacerbations was a “pretty impressive” 0.65 favoring CMS I-neb. Moreover, in contrast to data from the PROMIS II patients enrolled during the COVID pandemic, the other three sets of data were “remarkably consistent.”
If PROMIS II data collected from patients enrolled during COVID are compared with the other sets of data, they are “the clear outlier,” he asserted.
Many guidelines in Europe, including those from the European Respiratory Society and the British Thoracic Society, already recommend inhaled colistin in patients with bronchiectasis for the treatment of P. aeruginosa. Although Dr. Haworth believes that the preponderance of controlled data now argue that CMS I-neb is effective as well as safe (adverse events in the experimental and placebo arms of PROMIS I and II were similar), he is not sure what steps will be taken to confirm a benefit to regulatory authorities. According to Dr. Haworth, there are no approved inhaled antibiotics in the United States.
Referring to Zambon, which funded the trials and is developing CMS I-neb, Dr. Haworth said, “This will be a company decision. There are some logistical hurdles to doing another trial.”
Not least of these hurdles is that clinicians and patients already consider inhalational antibiotics in general and inhaled colistin specifically to be effective for several types of infections, including P. aeruginosa, according to Eva Polverino, MD, PhD, a pulmonologist associated with the Hospital Clinic of Barcelona. She said that these drugs are already a standard of care in her own country as well as in many other countries in Europe.
“There has been a loss of equipoise needed to conduct a randomized placebo-controlled trial,” Dr. Polverino said. In her opinion, the U.S. FDA “should start thinking of other pathways to approval.” She thinks that enrollment in a placebo-controlled trial is no longer appropriate.
Dr. Haworth and Dr. Polverino have disclosed no relevant financial relationships.
A version of this article first appeared on Medscape.com.
FROM WBC 2023