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Avian flu detected in New York City wild birds

2024-05-15
(Press-News.org) Washington, D.C.— May 15, 2024—A small number of New York City wild birds carry highly pathogenic H5N1 avian influenza, according to a recent study published in the Journal of Virology, a journal of the American Society for Microbiology. The work highlights that the interface between animals and humans that may give rise to zoonotic infections or even pandemics is not limited to rural environments and commercial poultry operations, but extends into urban centers.

 

“To my knowledge, this is the first large-scale U.S. study of avian influenza in an urban area, and the first with active community involvement,” said study co-author Christine Marizzi, PhD, principal investigator of the New York City Virus Hunters (NYCVH) Program, and BioBus director of community science, Harlem, New York City. “Birds are key to finding out which influenza and other avian viruses are circulating in the New York City area, as well as important for understanding which ones can be dangerous to both other birds and humans. And we need more eyes on the ground—that's why community involvement is really critical.”

 

The study came out of a program to monitor wild birds, which is a partnership between BioBus, the Icahn School of Medicine at Mount Sinai and the Wild Bird Fund. Through the program, local high school students partake in the research and communication efforts as paid interns under expert mentorship. Wearing appropriate protective gear, the students collect bird fecal samples in urban parks and green spaces. Additional samples from wild urban birds are submitted to the study by local animal rehabilitation centers such as the Wild Bird Fund and Animal Care Centers of New York. Students then help screen all samples in the Krammer laboratory at the Icahn School of Medicine at Mount Sinai for viruses.

 

In the study, the NYCVH collected and screened 1927 samples between January 2022 and November 2023 and picked up the H5N1 signal by detecting it in 6 city birds representing 4 different species. All the positive samples came from the urban wildlife rehabilitation centers, stressing the critical role such centers can play in viral surveillance. By comparing the genetic makeup of the samples to each other and other available H5N1 viruses in a public database, the researchers found that they were slightly different and belonged to 2 different genotypes, which are both a mix of Eurasian H5N1 2.3.4.4.b clade virus and local North American avian influenza viruses. New York City is a popular stopover location for migrating wild birds during their remarkable journey.

 

“It is important to mention that, because we found H5N1 in city birds, this does not signal the start of a human influenza pandemic. We know that H5N1 has been around in New York City for about 2 years and there have been no human cases reported,” Marizzi said.

 

Marizzi said that in their outreach, they spread awareness about H5N1 in city birds and provide information about what people can do to protect themselves. “It's smart to stay alert and stay away from wildlife. This also includes preventing your pets from getting in close contact with wildlife,” said Marizzi. If one must handle wildlife, it is important to always use safe practices any time when handling a sick or injured bird or other animals.

 

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The American Society for Microbiology is one of the largest professional societies dedicated to the life sciences and is composed of 36,000 scientists and health practitioners. ASM's mission is to promote and advance the microbial sciences.

 

ASM advances the microbial sciences through conferences, publications, certifications, educational opportunities and advocacy efforts. It enhances laboratory capacity around the globe through training and resources. It provides a network for scientists in academia, industry and clinical settings. Additionally, ASM promotes a deeper understanding of the microbial sciences to diverse audiences.

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[Press-News.org] Avian flu detected in New York City wild birds