Epidemiologic and genomic data revealed efficient cow-to-cow transmission of H5N1 avian influenza in the US, with evidence of cross-species transmission to cats and raccoons.
The virus replicated in the mammary gland of cattle, leading to virus shedding in milk; some infected cows produced discolored or curdled milk, indicating the potential of H5N1 transmission through dairy products.
The spread of H5N1 among dairy cattle in nine US states posed a significant threat to animal and public health, with confirmed cases of virus in raw milk and warnings against consuming unpasteurized milk products.
H5N1, primarily infecting birds, adapted to spread among various animals, including domesticated ones like minks, cats, and dogs, showcasing the virus's ability to cross species barriers.
#h5n1-avian-influenza #animal-to-animal-transmission #public-health #cross-species-transmission #zoonotic-diseases
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