USDA Confirms Highly Pathogenic Avian Influenza in a Dairy Herd in Wisconsin

Dec 15, 2025

the U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) National Veterinary Services Laboratories (NVSL) confirmed via PCR (polymerase chain reaction) and ELISA (Enzyme-Linked Immunosorbent Assay) assay a detection of highly pathogenic avian influenza (HPAI) H5 clade 2.3.4.4b in a dairy cattle herd in Wisconsin. APHIS will complete genetic sequencing and announce final results as soon as they are available. This confirmation was a result of routine National Milk Testing Strategy testing, not pre-movement surveillance.

This marks the first known case of HPAI in cattle in Wisconsin. While dairy cattle in a total of 18 states have been infected since the start of the outbreak in March 2024, APHIS has seen cases in only a small number of states this year. APHIS is working closely with the Wisconsin Department of Agriculture, Trade, and Consumer Protection to conduct additional on-farm investigations, diagnostic testing, and epidemiological data collection to better understand the detection and prevent further disease spread.

Source : usda.gov

Video: Season 6, Episode 7: Takeaways from the Second International Conference on Pig Livability

This year’s conference fostered open, engaging conversations around current research in the swine industry, bringing together hundreds of attendees from 31 states and six countries. Two leaders who helped organize the event joined today’s episode: Dr. Joel DeRouchey, professor and swine extension specialist in the Department of Animal Sciences and Industry at Kansas State University, and Dr. Edison Magalhaes, assistant professor in the Department of Animal Sciences at Iowa State University. They share key takeaways from the conference, including the importance of integrating data when evaluating whole-herd livability, building a culture of care among employees and adopting new technologies. Above all, the discussion reinforces that this industry remains, at its core, a people business.