Jan 31, 2025 · A multistate outbreak of HPAI A(H5N1) bird flu in dairy cows was first reported on March 25, 2024. This is the first time that these bird flu viruses had been found in cows. In the United States, since 2022, USDA APHIS has reported HPAI A(H5N1) virus detections in more than 200 mammals.

Jan 17, 2025 · The FDA’s ongoing assessments of the milk safety system continue to confirm that pasteurization is effective at eliminating infectious H5N1 virus in dairy milk.

6 days ago · Avian influenza virus type A (H5N1) has been confirmed in dairy cattle in 16 states: 735 herds in California, 64 in Colorado, 35 in Idaho, 30 in Michigan, 27 in Texas, 13 each in Iowa and Utah, nine each in Minnesota and New Mexico, seven in South Dakota, five in Nevada, four in Kansas, two in Oklahoma, and one each in North Carolina, Ohio, and ...

3 days ago · Detection came from milk testing in Nevada. The new spillover was detected in an investigation that followed confirmation of H5N1 in milk sampling from Nevada dairy cows. A few days ago, APHIS reported four recent H5N1 detections in Nevada dairy herds, the state's first since December.

3 days ago · A genotype of avian influenza type A H5N1 mostly found in wild birds and poultry has now been discovered in dairy cattle. On January 31, the U.S. Department of Agriculture (USDA) Animal and Plant Health Inspection Service’s (APHIS) National Veterinary Services Laboratories (NVSL) confirmed by whole genome sequence the first detection of H5N1 clade 2.3.4.4b, genotype D1.1 in dairy cattle.

This is the first detection of this virus genotype in dairy cattle (all previous detections in dairy cattle have been HPAI H5N1 clade 2.3.4.4b, genotype B3.13). Genotype D1.1 represents the predominant genotype in the North American flyways this past fall and winter and has been identified in wild birds, mammals, and spillovers into domestic ...

Jun 14, 2024 · Influenza A(H5N1) virus has been identified in dairy herds and in the commercial milk supply. In this report, inactivation of the virus in milk by heating is studied.

May 24, 2024 · In late March 2024, highly pathogenic avian influenza virus (HPAI) of the H5N1 subtype was for the first time detected in nasal swabs and milk of dairy cows, increasing concern that HPAI A...

H5N1 avian flu virus survived in raw dairy milk kept under refrigerated conditions for at least five weeks. When mice consumed infected raw milk, they showed signs of illness, suggesting that drinking raw milk may pose a risk of transmission to people.

Tests so far indicate that the virus detected in dairy cows is H5N1, Eurasian lineage goose/Guangdong clade 2.3.4.4b. This is the same clade that has been affecting wild birds and commercial poultry flocks and has caused sporadic infections in several species of wild mammals, and neonatal goats in one herd in the United States.