Federal Testing Improves Detection of H5N1 Avian Flu in US Dairy Herds

Feb 09, 2026

By Laine Bergeson

Influenza A(H5N1) viral RNA was widely present in US retail milk during the spring 2024–25 outbreak among dairy cattle, according to a report published late last week in Emerging Infectious Diseases.

In milk samples collected from April 13 to May 3, 2024, researchers detected influenza A viral RNA in 36% of samples from 13 states, including in five states (Arkansas, Indiana, Minnesota, Missouri, and Oklahoma) that had no reported outbreaks at the time. Across the country, only 29 infected herds had been reported as of April 12, a total that was inconsistent with the number of positive samples.

“Our study revealed that early in the outbreak, the influenza A(H5N1) virus was more widespread than reported,” the researchers write.

Source : umn.edu

Video: PRRS Eradication Strategies - Dr. DeBuse and Dr. Tousignant

In this episode of The Swine it Podcast Show, Dr. Neil DeBuse from Kalmbach Feeds and Dr. Steve Tousignant from Vaxxinova US discuss PRRS management strategies, recombination risks, whole genome sequencing, and the role of autogenous immunization programs in swine systems. They highlight practical approaches to improving immunity, reducing outbreaks, and advancing PRRS control across production systems. Listen now on all major platforms!

"Being PRRS negative sooner is a real key for eradication because every additional positive week increases production losses and viral exposure risks." - Dr. Neil DeBuse

Meet the guest: Dr. Neil DeBuse is a veterinarian at Kalmbach Feeds with more than 30 years of experience in swine health and production. His work focuses on PRRS control, biosecurity, immunity, and improving production stability across commercial swine systems in the United States and internationally.

Dr. Steve Tousignant is Director of the Swine Business Unit and Technical Services Veterinarian at Vaxxinova US, with a DVM and PhD from the University of Minnesota. His experience combines epidemiology, technical services, and practical immunization strategies designed to support consistent herd performance and long-term production stability. Don’t miss the chance to be part of the Swine Inner Circle!