H5N1 Affecting Lactating Dairy Cattle

Avian influenza virus type A (H5N1) in U.S. dairy cattle

Common clinical signs in affected cows include low appetite, reduced milk production, and abnormal appearance of milk (thickened, discolored). Lactating cows ...

Investigation of Avian Influenza A (H5N1) Virus in Dairy Cattle | FDA

After the first detection of HPAI H5N1 in dairy cattle in March 2024, the FDA has engaged in research and other efforts with industry, federal, and state ...

Current H5N1 Bird Flu Situation in Dairy Cows - CDC

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 ...

HPAI in Livestock | Animal and Plant Health Inspection Service - USDA

Caused by influenza type A viruses, the disease varies in severity depending on the strain and species affected. HPAI H5N1 viral infection was first confirmed ...

K-State research finds bovine H5N1 influenza may spread via milking

In addition, the mammary glands of three other dairy cows were inoculated with H5N1 euDG, the avian influenza clade 2.3.4.4b strain that is ...

Spillover of highly pathogenic avian influenza H5N1 virus to dairy ...

Infectious virus and viral RNA were consistently detected in milk from affected cows. Viral distribution in tissues via immunohistochemistry and ...

Features of H5N1 influenza viruses in dairy cows may facilitate ...

A series of experiments with highly pathogenic H5N1 avian influenza (HPAI H5N1) viruses circulating in infected U.S. dairy cattle found that ...

H5N1 Affecting Lactating Dairy Cattle | Public - Clemson University

The virus has been shown to spread from wild birds to dairy cows and there is evidence of some spread from dairy to dairy and from dairy premises to poultry ...

USDA reports reveal biosecurity risks at H5N1-affected dairy farms

Shared equipment and shared personnel working on multiple dairy farms are some of the main risk factors for ongoing spread of highly pathogenic H5N1 avian flu ...

Avian Flu Has Infected Dairy Cows in More Than a Dozen States

Since the infection is largely restricted to the mammary glands, researchers believe that H5N1 is being transmitted to cows by contaminated milk ...

H5N1 and Dairy Cattle | Minnesota Department of Agriculture

All lactating (currently producing milk) dairy cows must have both a negative H5N1 test result and Certificate of Veterinary Inspection (CVI) to attend any ...

AHFSS - AHB - H5N1 Bird Flu Virus in Livestock - CDFA

Lactating dairy cattle from herds which have tested positive for Influenza A are not eligible for interstate movement for thirty (30) days from the most recent ...

USDA requires HPAI testing for lactating dairy cattle before ...

... H5N1) in dairy cattle before interstate travel. Further, HPAI will ... Infection with the virus is causing decreased lactation, low appetite, and ...

High H5N1 influenza levels found in mice given raw milk from ...

Mice administered raw milk samples from dairy cows infected with H5N1 influenza experienced high virus levels in their respiratory organs ...

What's Happening With Dairy Cows and Bird Flu | Johns Hopkins

The H5N1 strain of avian influenza has been ... cows who are lactating are in a different category of susceptibility than young calves.

Resources for Highly Pathogenic Avian Influenza (HPAI) H5N1 virus ...

HPAI, primarily known for its devastating impact on avian species, has recently been observed and identified in dairy cows. This influenza strain, characterized ...

Highly Pathogenic Avian Influenza H5N1 Genotype B3.13 in Dairy ...

Impact varies significantly between farms;. •. Lactating cows are most highly affected;. •. Morbidity is <10% on average; and,. •. Mortality and culling is 2% ...

Bird flu in milk supply is likely coming from asymptomatic cows| STAT

Since March, when the first reported cases of H5N1 bird flu began showing up in dairy cattle in Texas, the Food and Drug Administration has ...

How Bird Flu Caught the Dairy Industry Off Guard | Scientific American

Moreover, only about 10 percent of an affected dairy herd seems to get infected with H5N1. And cows aren't dying; they bounce back to health ...

Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4b ... - CDC

In conclusion, we showed that dairy cattle are susceptible to infection with HPAI H5N1 virus and can shed virus in milk and, therefore, might ...