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Why Is The Current Bird Flu So Deadly?

What’s making the latest strain of bird flu so deadly? Avian influenza used to mostly affect poultry, and while it continues to decimate poultry populations around the world, the latest strain, H5N1, is spreading widely among wild birds. It also seems to be spreading to mammals more frequently.

“Something is quite different about this virus this go around,” Rebecca Poulson, a wildlife disease researcher at the University of Georgia, told Nature.

Researchers aren’t sure why the current outbreak hasn’t disappeared, but they believe mutations may have increased its ability to replicate or to infect a broader range of species.

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Season 7, Episode 6: Using Competitive Exclusion to Reduce E. coli in Weaned Pigs

Video: Season 7, Episode 6: Using Competitive Exclusion to Reduce E. coli in Weaned Pigs

Newly weaned pigs are especially vulnerable to pathogenic E. coli, which can cause diarrhea and other health challenges. Research is exploring how introducing beneficial bacteria before exposure to harmful bacteria could help reduce the severity of post-weaning disease, with timing playing an important role.

Dr. Marcelo Almeida, assistant professor in Iowa State University’s College of Veterinary Medicine, and Dr. Rodrigo Paiva, graduate student and pathology resident at the Iowa State University Veterinary Diagnostic Laboratory, discuss their research on competitive exclusion in weaned pigs. They explain how this approach works, why introducing beneficial microorganisms before E. coli exposure may improve outcomes and what they learned about diarrhea, E. coli shedding and pig performance. The conversation also explores the potential to address antimicrobial resistance and the considerations for applying these findings in commercial pork production.