Update on Testing Order for Lactating Dairy Cattle

In an effort to prevent the spread of highly pathogenic avian influenza (HPAI) (H5N1) in dairy cattle and poultry, the Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) is requiring Influenza A testing prior to movement of lactating dairy cattle to fairs or exhibitions effective beginning today, June 19, 2024.

The USDA National Veterinary Services Laboratories (NVSL) has now confirmed the presence of HPAI (H5N1) in more than 100 dairy herds in 12 states including Iowa, Michigan, and Minnesota. Access the full list of H5N1 detections in livestock.

Amid this evolving situation, DATCP continues to encourage poultry owners to protect their flock by practicing strong biosecurity.

While this effort seeks to limit the spread of this disease, further prevention efforts are advised as there is risk of disease transmission anytime animals are commingled. Poultry owners choosing to participate in fairs or exhibitions should consider:

• Speaking with your flock veterinarian about your biosecurity plans
• Monitoring show poultry closely prior to the event to screen for any subtle signs of illness
• Avoiding the use of shared equipment with other exhibitors
• Isolating poultry that return from a show or exhibition from the home flock for at least two weeks

HPAI is highly contagious and often fatal to domestic poultry and can be spread by commingling with wild birds or their droppings and through contact with infected animals, equipment, or clothing worn by anyone working with infected animals.

The following are signs of HPAI infection in birds:

• Sudden death without clinical signs
• Lack of energy or appetite
• Decrease in egg production; soft, misshapen eggs
• Purple discoloration of wattles, comb, and legs
• Difficulty breathing
• Runny nose, coughing, sneezing
• Stumbling or falling down
• Diarrhea

Be sure to monitor flocks for any changes in behavior and call (608) 224-4872 or email DATCPanimalimports@wisconsin.gov to report any birds that may appear sick or that have recently died.

DATCP will continue to update the HPAI in Wisconsin Poultry webpage with new resources and information about the impact of the virus among commercial and backyard flocks.

Additional Resources

• DATCP HPAI in Dairy Cattle
• DATCP HPAI (H5N1) in Dairy Cattle FAQ
• DATCP Biosecurity Information
• Health Emergency Preparedness and Response: Wisconsin Department of Health Services (dhs.wi.gov)
• USDA, HHS Announce New Actions to Reduce Impact and Spread of H5N1

For more information, resources and updates on HPAI in Wisconsin, visit the DATCP website.