BioSec Bob here on Monday, May 25, 2026 — let’s dig into what’s moving the needle this morning.
Researchers at Pirbright have completed a study on how mutations in the H5 virus are affecting vaccine effectiveness in poultry flocks, according to Poultry World. The work examines genetic shifts in circulating H5 strains and their relationship to current vaccine formulations. The findings are being analyzed to help producers and vaccine manufacturers understand where protection gaps may exist and how quickly vaccination strategies might need to adapt as the virus continues to evolve in the field.
On the nutrition side, All About Feed is reporting on research into butyric acid and yeast culture combinations for broiler health. The study looked at how these two additives work together in feed programs to support gut integrity and performance. The data showed measurable improvements in bird health outcomes when the ingredients were used in tandem, compared to either additive used alone in controlled trials.
Moving to a human health concern out of Michigan, WJRT ABC12 is tracking a rise in salmonella cases connected to backyard poultry flocks. The station reports that confirmed cases have been linked to direct contact with backyard birds, including handling and exposure in residential settings. Michigan Department of Health and Human Services has documented the cluster and is investigating the scope of exposure across affected households and communities in the state.
Turning to swine, TheLandOnline is running a feature reminding producers about pseudorabies vigilance. The piece walks through what PRV looks like in modern swine operations, how it spreads, and why continued monitoring and biosecurity remain critical even though the disease was officially eradicated from the U.S. commercial herd decades ago. The story emphasizes that PRV still circulates in feral swine populations and neighboring countries, and accidental introduction remains a real risk.
Back to poultry disease management, Feedstuffs is highlighting a new monograph that takes a comprehensive look at bird flu risk across production systems. The publication examines transmission routes, biosecurity effectiveness, and vaccine performance data in one integrated resource. The monograph is intended as a reference for operations looking to evaluate their current protocols against the latest understanding of avian influenza dynamics.
And finally, Poultry World reports on research into plant-based ingredients as part of coccidiosis control strategies in broilers. Scientists evaluated several botanical adjuncts alongside conventional management and chemical tools to see how they might reduce reliance on single interventions. Early findings suggest certain plant extracts show promise in reducing oocyst shedding and improving intestinal health markers when incorporated into broader flock management programs.
Lot of biosecurity and immunity work in focus right now — stay sharp out there.