Farms.com Home   Ag Industry News

Spring Bird Migration Drives Rise in Avian Influenza Cases

Spring Bird Migration Drives Rise in Avian Influenza Cases
Mar 24, 2026
By Farms.com

Avian Flu Surge Spurs Biosecurity Alerts for Poultry Farms

Veterinary professionals are calling on both large-scale poultry operations and backyard flock owners to tighten biosecurity practices as avian influenza cases increase during the spring migration period. The seasonal movement of wild birds continues to play a major role in spreading the virus, raising concerns across the poultry industry.

Recent federal reports indicate that Wisconsin, for example, has recorded the second-highest number of affected birds in the past month, with Ohio reporting the highest. Across the United States, more than 14.3 million birds in 84 flocks have been infected with highly pathogenic avian influenza. Experts point to migrating wild birds as the primary source of exposure.

“With the increased exposure, we do see an uptick or increase in cases of highly pathogenic avian influenza,” said Alan Huddleston of the U.S. Department of Agriculture’s Animal and Plant Health Inspection Service. “This spring, we are seeing that same pattern as we have seen since the outbreak first began.”

Since the current strain emerged in 2022, the outbreak has impacted nearly 200 million birds across more than 2,100 flocks nationwide, making it the largest event of its kind in U.S. history.

“We’re definitely entering a period of increased concern, where we’re concerned that the risk from wild birds sharing this virus with domestic birds is higher than it was in the previous months,” said Heather Roney of the Wisconsin Department of Agriculture, Trade and Consumer Protection.

Officials emphasize that strong sanitation, limited exposure, and close monitoring remain critical, especially as the virus continues circulating in wild bird populations.

Photo Credit: gettyimages-branex


Trending Video

PRRS Eradication Strategies - Dr. DeBuse and Dr. Tousignant

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!