Scientists identify avian cholera as major cause of penguin deaths in Antarctica
Researchers have determined that a mass die-off of Adélie penguins in Antarctica was caused by avian cholera rather than the feared H5N1 bird flu. The study underscores the importance of accurate disease surveillance in remote wildlife populations.
Why it matters
Understanding the specific causes of wildlife mortality is critical for conservation efforts and managing the spread of infectious diseases in vulnerable ecosystems.
edited by Gaby Clark , reviewed by Robert Egan
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Add to Preferred Sources Adélie penguins returning to their colony after feeding at sea. Credit: Ralph Vanstreels/UC Davis Thousands of Adélie penguins found dead in Antarctica in 2024 were primarily victims of avian cholera, not high pathogenicity avian influenza (H5N1) as researchers initially suspected, according to a study published today in Proceedings of the Royal Society B: Biological Sciences . The findings highlight an underrecognized threat to Antarctic wildlife and the importance of comprehensive disease investigations, particularly as H5N1 continues to raise concerns for seabird and marine mammal populations.
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