USDA Says H5 Avian Flu Detection in Wisconsin Dairy Herd is New Spillover Event

Dec 24, 2025

By Chris Dall

The US Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS) confirmed last week that the recent detection of highly pathogenic avian influenza (HPAI) in a Wisconsin dairy herd represents a new spillover event from wildlife.

In a December 19 update, APHIS said whole-genome sequencing confirmed that the virus detected in a Wisconsin dairy herd on December 14 is H5N1 clade 2.3.4.4b genotype D1.1, which was implicated in two spillover events in dairy herds in Nevada and Arizona earlier this year. The Wisconsin spillover event is considered separate from those two previous spillovers, APHIS said. No additional infected dairy herds have been detected.

Source : umn.edu

Video: Industry–University Collaborations in Swine Research - Dr. Jordan Gebhardt and Matt Einarson

In this episode of The Swine it Podcast Show, Dr. Jordan Gebhardt from Kansas State University and Matt Einarson from SAM Nutrition explore how academic–industry partnerships are driving innovation in swine nutrition. They share how collaborations support graduate training, create credibility, and translate research into practical strategies for producers. Discover real trial outcomes, sustainability initiatives, and why bridging science with industry is essential for the future. Listen now on all major platforms!

"The partnership with universities allows research to stay current, answering real questions that nutritionists and producers are asking today." - Dr. Jordan Gebhardt

Meet the guest: Dr. Jordan Gebhardt / jordan-gebhardt-9a6b4b120 , Associate Professor of Swine Production at Kansas State University, combines expertise in veterinary medicine and applied swine nutrition to improve herd health and productivity through research and student training. Matt Einarson / matt-einarson-7a00a123 , Vice President of Sales and Business Development North America at SAM Nutrition, brings more than two decades of leadership in global agribusiness, specializing in strategy, market development, and feed innovation.