Wisconsin Continues Milk Testing for H5N1

By Scout Nelson

The U.S. Department of Agriculture (USDA) has confirmed highly pathogenic avian influenza (HPAI), or H5N1, in the past 30 days with one case in poultry and one in livestock in separate states. To date, no H5N1 cases have been detected in livestock in Wisconsin. Updated lists of detections are available for both poultry and livestock.

Wisconsin is actively participating in the mandatory USDA Animal and Plant Health Inspection Service (APHIS) National Milk Testing Strategy (NMTS). With support from industry partners, milk samples are being tested monthly at the farm level.

The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) reports that more than 13,000 PCR milk samples have been tested so far, with no H5N1 detected. These results represent nearly all licensed dairies in the state, with remaining verifications underway. Weekly updates will continue to be posted on the DATCP website.

As fairs and shows continue during the summer, DATCP emphasizes the importance of biosecurity and disease monitoring. Event organizers and livestock owners are encouraged to use available biosecurity resources for cattle, poultry, and swine. Any herds or flocks showing unexplained symptoms should be reported immediately to DATCP, while sick, dead, or injured wildlife can be reported to the Wisconsin Department of Natural Resources.

Two testing requirements remain in effect:

• Federal Order (April 24, 2024): Lactating dairy cattle must test negative for Influenza A before interstate movement.
• Wisconsin Cattle Testing Order: Dairy cattle must test negative for Influenza A before moving to fairs or exhibitions.

DATCP has also released an H5N1 protocol guide for dairy operations, outlining steps in case of confirmed detection. This serves as a reference for industry preparation and response.

The Wisconsin Department of Health Services (DHS) advises those working with animals to wear personal protective equipment (PPE) as recommended by the Centers for Disease Control and Prevention (CDC). While human cases have been linked to animal exposure, the CDC confirms that the public health risk remains low.

Photo Credit:gettyimages-dimasobko