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#Risk #Assessment of Spread of the #Influenza А Virus in #Cows in South #Bulgaria

Abstract In this article, we present an assessment of the risk of the potential introduction and spread of highly pathogenic avian influenza (HPAI) in cows in Bulgaria . In the spring of 2024, we witnessed an unprecedented spread of the virus in dairy herds in the USA . This crossing of interspecies barriers by the virus creates a real danger of pandemic manifestations in humans . The continued spread of H5N1 clade 2.3.4.4b in dairy populations and other mammalian species and efficient animal-to-animal transmission increases the risk of infection and subsequent spread of the virus in human populations. According to registers, as of 1 November 2022, a total of 559,544 cattle were bred in Bulgaria . The total number of dairy cows decreased by 5.2% year-on-year to 197,996. Farms breeding dairy cows as of 1 November 2022 were 12,439, which is 22.1% less than the previous year. The production of cow’s milk in 2022 amounted to 748,278 thousand liters. Traditionally, the largest share in the ...