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: Reducing Nursery Feed Costs Without Losing Performance - Dr. Julian Arroyave

In this episode of The Swine Nutrition Blackbelt Podcast, Dr. Julian Arroyave, a research swine nutritionist at Carthage Innovative Swine Solutions, discusses nursery feed budget strategies designed to reduce costs without compromising pig performance. He explains trials comparing high, medium, and low phase 1 and phase 2 feed budgets, including commercial validation data showing improved income over feed cost when lower-budget programs were applied under healthy herd conditions. Listen now on all major platforms!

Click here to read the full research article: https://academic.oup.com/tas/article/...

"Results showed that the low-budget program increased income over feed cost by $1.48 per pig."

Meet the guest: Dr. Julian Arroyave / julian-arroyave-jaramillo-638740129 is a research swine nutritionist at Carthage Innovative Swine Solutions, with experience in nursery nutrition, diet formulation, and commercial research trials. He completed his PhD at Kansas State University and previously worked as a nutrition supervisor at Kekén in Mexico. His work focuses on nutritional strategies that improve production efficiency while controlling feed costs. Learn more from Dr. Julian Arroyave Jaramillo on The Swine Nutrition Blackbelt Podcast, available on all major platforms.