The Eurasian strain of highly pathogenic avian influenza (HPAI H5N1) was detected in two mountain lions in Mono County in December 2022 and January 2023, according to wildlife health experts with the California Department of Fish and Wildlife (CDFW).
This is the second species of wild mammal known to have contracted HPAI H5N1 in California since the virus was reported in wild birds in July 2022. In January, the virus was detected in a bobcat found in Butte County.
As stated by Dr. Jamie Rudd, “The main route of disease transmission for carnivores seems to be through ingestion of infected birds – typically waterfowl such as geese. Biologists following the movements of these mountain lions noted that they had preyed upon wild Canada geese in the past.”
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