Highly pathogenic avian influenza A(H5N1) outbreak in Finnish fur farms

Histopathological findings of fur animals infected with highly pathogenic avian influenza A(H5N1) virus, Finland, July–October 2023 (n?=?3). Credit: Eurosurveillance (2024). DOI: 10.2807/1560-7917.ES.2024.29.25.2400063 Between July and October 2023, highly pathogenic avian influenza (HPAI) A(H5N1) was detected in animals on 27 fur farms in Finland. The outbreak, traced to wild birds, revealed significant virus adaptation to mammals. The virus caused severe inflammation in animals’ lungs, brains, and livers. Further genetic analyses identified three viral clusters, with mutations facilitating mammalian adaptation. The outbreak likely originated from extensive exposure of fur animals to infected Read More

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