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US Has Worst Bird Flu Outbreak in Two Years at Iowa Egg Farm

By Michael Hirtzer

Deadly bird flu was detected in an egg-laying chicken flock in Iowa, affecting 4.2 million birds in the biggest U.S. outbreak since 2022.

The detection is the first since December in Iowa, which is the top U.S. egg producer with nearly 12% of the country's layer hens, according to U.S. Department of Agriculture data. The findings come as the virus has been infecting  across the U.S.

The Iowa Department of Agriculture and Land Stewardship said the site is in Sioux County, according to a statement on May 28.

It's the worst outbreak since more than 5 million birds were affected at a farm in Iowa's Osceola County in March 2022, when the virus was first spreading in the country. Prices for eggs surged to a record as tens of millions of birds were killed to slow the spread.

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Heat Stress Killing Profits? - Dr. Jeff Hansen

Video: Heat Stress Killing Profits? - Dr. Jeff Hansen

In this episode of The Swine Nutrition Blackbelt Podcast, Dr. Jeff Hansen from Elanco shares practical strategies to reduce heat stress in grow-finish pigs. He discusses how rising temperatures affect feed intake, growth, and carcass quality, and explains how nutritional tools, such as Skycis, and environmental adjustments can help maintain performance during high-stress periods.

Listen now on all major platforms! "Technologies that reduce heat or metabolic stress in pigs deliver the greatest value during summer, when growth is challenged and profit potential is highest.

" Meet the guest: Dr. Jeffrey Hansen / jeff-hansen-00b72322 is a Swine Technical Consultant at Elanco Animal Health. He holds a Ph.D. in Swine Nutrition from Kansas State University, along with degrees in Animal Science and Nutrition from Texas A&M University. With a passion for pork fat quality, feed management, and production efficiency, Dr. Hansen brings decades of swine nutrition and technical expertise to the industry.