Wisconsin Cattle Test Positive for Epizootic Hemorrhagic Disease, State Officials Confirm
The Wisconsin Department of Agriculture, Trade and Consumer Protection (DATCP) has confirmed cases of epizootic hemorrhagic disease (EHD) in non-lactating dairy cattle in Waukesha County. This viral infection, spread by biting flies (midges or no-see-ums), has also been detected in tissue samples from wild and captive deer in the region. EHD typically emerges in late summer and early fall when insect populations are at their peak, with new cases usually subsiding after the first hard frost of the season. The last reported EHD case in Wisconsin cattle was in 2013. While deer often show severe symptoms, cattle rarely do. When symptoms appear in cattle, they can include lameness, fever, weight loss, excessive salivation, and sores on the limbs, mouth, or teats. These symptoms can mimic Foreign Animal Diseases, necessitating further testing for an accurate diagnosis. Currently, there is no specific treatment for EHD.