Intercontinental Movement of Highly Pathogenic Avian Influenza A(H5N1) Clade 2.3.4.4 Virus to the United States, 2021

Emerg Infect Dis. 2022 May;28(5):1006-1011. doi: 10.3201/eid2805.220318. Epub 2022 Mar 18.

Abstract

We detected Eurasian-origin highly pathogenic avian influenza A(H5N1) virus belonging to the Gs/GD lineage, clade 2.3.4.4b, in wild waterfowl in 2 Atlantic coastal states in the United States. Bird banding data showed widespread movement of waterfowl within the Atlantic Flyway and between neighboring flyways and northern breeding grounds.

Keywords: United States; clade 2.3.4.4; dispersal; highly pathogenic avian influenza A(H5N1) virus; influenza; influenza viruses; intercontinental movement; respiratory infections; viruses; wild birds; zoonoses.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Animals, Wild
  • Birds
  • Humans
  • Influenza A Virus, H5N1 Subtype*
  • Influenza A virus* / genetics
  • Influenza in Birds* / epidemiology
  • Influenza, Human*
  • Phylogeny
  • United States / epidemiology