Bird Flu Detected in Wisconsin Dairy Herd, Farmers Remain Unconcerned

In a recent development, highly pathogenic avian influenza was confirmed in a dairy herd in Wisconsin, marking an unusual case as the virus is typically associated with poultry. Despite this finding, local dairy farmers are not overly concerned about the virus spreading further in Eau Claire County. Testing conducted by the Wisconsin Department of Agriculture, Trade and Consumer Protection played a key role in identifying the virus.

Assistant State Veterinarian Dr. Elisabeth Patton reported that since May 2025, over 24,000 milk samples have been tested, with this being the first positive detection for avian influenza. Dr. Patton emphasized the importance of consulting veterinarians if farmers have any concerns, even though this instance is not considered highly pathogenic.

Farmers at Bert-Mar Farms have expressed that while the virus is acknowledged, their primary concerns are currently dominated by falling milk prices. Erica Lundberg, a farmer, mentioned the ease of contacting their veterinarian to address any potential issues swiftly.

Dr. Jay Oldendorf, the farm's veterinarian, noted that although avian influenza can severely affect milk production, it does not typically lead to high mortality in dairy cattle. The virus can cause respiratory symptoms in both poultry and dairy cattle, but its impact varies significantly between the two.

Overall, the detection of the virus has prompted a cautious approach among dairy farmers, but the primary focus remains on economic challenges rather than health threats from avian influenza.