Highly Pathogenic Avian Influenza A(H7N3) Virus in Poultry, United States, 2020

Abstract

An outbreak of low-pathogenicity avian influenza A(H7N3) virus of North American wild bird lineage occurred on commercial turkey farms in North Carolina and South Carolina, USA, during March–April 2020. The virus mutated to the highly pathogenic form in 1 house on 1 farm via recombination with host 28S rRNA.

Keywords

• highly pathogenic avian influenza virus
• influenza A(H7N3)
• poultry
• phylogenetic analysis
• United States
• influenza