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Genotype Diversity of Highly Pathogenic Avian Influenza H5N1 Clade 2.3.4.4b in Pennsylvania Poultry During Disease Outbreak from April 2022 to March 2023.

Viruses - 28 Apr 2026

Tewari Deepanker, Sekhwal Manoj K, Nicholson Chrislyn, Killian Mary L, Zellers Corey, Livengood Julia, Lantz Kristina, Torchetti Mia, Hamberg Alex

Abstract excerpt

The 2022 highly pathogenic avian influenza (HPAI) outbreak of H5N1 clade 2.3.4.4b was one of the major avian influenza outbreaks, leading to multiple spillover events infecting domestic and wild bird flocks, as well as mammals. The sustained spread was a result of viral circulation in wild birds across migratory flyways in North America. Pennsylvania has a significant poultry population that supports both retail...

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PMID: 42198705
DOI: 10.3390/v18050502
PMCID: PMC13211549

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