Content overview: “Avian Cholera, Not Bird Flu, Caused Mass Adélie Penguin Deaths in Antarctica, Study Finds”. Thousands of Adélie penguins found dead in Antarctica in 2024 were primarily killed by avian cholera, not the highly pathogenic H5N1 bird flu that researchers initially suspected, according to a new study in Proceedings of the Royal Society B: Biological Sciences. The discovery reframes understanding of disease threats to Antarctic wildlife, where H5N1 has dominated recent concern for seabirds and marine mammals. Scientists say the findings underscore the need for thorough diagnostic testing rather than assuming emerging viruses are to blame.
Avian cholera, caused by the bacterium Pasteurella multocida, is known to cause rapid die-offs in birds globally but had not been documented as a major killer in Antarctica. The research highlights how little is known about pathogen dynamics in the remote region and the risk that climate change and human activity could introduce or amplify diseases. This listing links straight to the original page, where the content is available in full.