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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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Dr. David Rosero: Fat Quality in Swine Diets

Video: Dr. David Rosero: Fat Quality in Swine Diets

In this episode of The Swine Nutrition Blackbelt Podcast, Dr. David Rosero from Iowa State University explores the critical aspects of fat quality and oxidation in swine diets. He discusses how different types of lipids affect pig performance and provides actionable insights on managing lipid oxidation in feed mills. Don’t miss this episode—available on all major platforms.

Highlight quote: "Increasing levels of oxidized fats in swine diets reduced the efficiency of feed utilization, increased mortality, and led to more pigs being classified as culls, reducing the number of full-value pigs entering the finishing barns."

Meet the guest: Dr. David Rosero / davidrosero is an assistant professor of animal science at Iowa State University. His research program focuses on conducting applied research on swine nutrition and the practical application of smart farming. He previously served as the technical officer for The Hanor Company, overseeing nutrition, research, and innovation efforts.