Antarctic penguin deaths first linked to bird flu were largely avian cholera
WHAT THE EVIDENCE SAYS
Investigators examining dead Antarctic seabirds associated widespread Adélie penguin mortality with Pasteurella multocida, the bacterium causing avian cholera. The organism was identified in 46 of 49 sampled animals; highly pathogenic avian influenza was found in only a few. Related bacterial lineages had been recorded previously in the region.
WHY IT MATTERS / OUR READ
When a dominant outbreak narrative takes hold, managers can miss another persistent threat. Independent pathology and multi-pathogen testing matter both for credible attribution and for building wildlife-health surveillance that catches less visible threats.
CAVEATS / UNCERTAINTY
Samples were collected from a particular event and do not represent all dead penguins across Antarctica. Genetic similarity alone does not establish a specific transmission route or date of introduction.
SOURCE
Proceedings of the Royal Society B · penguin mortality investigation
View original evidence ↗
UC Davis research announcement
View supporting source ↗
Pathology and genetic analysis give a different diagnosis of a major wildlife mortality event.
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