HPAI Confirmed in Barron County Poultry Flock

MADISON, Wis. — The following is an update on Highly Pathogenic Avian Influenza (HPAI) caused by the influenza virus H5N1.

The H5N1 virus has continued to circulate in both wild and domestic birds in North America since December 2021. Since that time, the H5N1 virus has also affected other species, including mammalian species. A specific genotype of H5N1 virus was first detected in dairy cattle earlier this year in Texas. In the past 30 days, the USDA National Veterinary Services Laboratories (NVSL) has confirmed the presence of H5N1 in 339 dairy herds in two states. To date, Wisconsin has not identified an H5N1 infection in a dairy herd in the state, and the specific genotype affecting dairy cattle in other states has not been identified in Wisconsin. DATCP continues to work with USDA to conduct testing for H5N1, encourage biosecurity, and provide resources to producers.

Last week, DATCP announced that there is a case of HPAI H5N1 in a commercial poultry flock in Barron County. Access the press release.

Biosecurity and Monitoring

Producers should continue to enhance biosecurity and monitor disease in their herds.
- Access resources for cattle, poultry, and swine biosecurity practices.
Report herds with unexplained symptoms to DATCP at (608) 224-4872 (business hours) or (800) 943-0003 (after hours and weekends).

April 24 Federal Order

Lactating dairy cattle must test negative for Influenza A virus at a National Animal Health Laboratory Network (NAHLN) lab before interstate movement.
A subset of 30 cows must be tested for groups moving together.
Access the April 24 Federal Testing Order.
Access the federal guidance.

Wisconsin Requirements

Lactating dairy cattle must test negative for Influenza A virus before moving to fairs or exhibitions.
Access the Wisconsin Cattle Testing Order.
Access the FAQ.

Human Health Precautions

Human cases of H5N1 have been reported following exposure to dairy cattle.
- Access the confirmed cases and exposure sources for human infections.
Wisconsin Department of Health Services (DHS) advises those working with animals to take precautions and wear PPE per CDC guidance.
- Request PPE from Wisconsin DHS medical stockpile.
According to the Centers for Disease Control and Prevention (CDC), the public health risk from H5N1 detections remains low.

Food Safety

The Food and Drug Administration (FDA) and USDA continue to emphasize that the commercial milk supply is safe because of the pasteurization process.
USDA is also confident that the meat supply is safe.

Resources:

–Wisconsin DATCP