Cocirculation of Genetically Distinct Highly Pathogenic Avian Influenza H5N5 and H5N1 Viruses in Crows, Hokkaido, Japan

Emerg Infect Dis. 2024 Sep;30(9):1912-1917. doi: 10.3201/eid3009.240356. Epub 2024 Aug 6.

Abstract

We isolated highly pathogenic avian influenza (HPAI) H5N5 and H5N1 viruses from crows in Hokkaido, Japan, during winter 2023-24. They shared genetic similarity with HPAI H5N5 viruses from northern Europe but differed from those in Asia. Continuous monitoring and rapid information sharing between countries are needed to prevent HPAI virus transmission.

Keywords: H5N1; H5N5; Japan; crows; highly pathogenic avian influenza virus; influenza; respiratory infections; subtype; viruses; zoonoses.

MeSH terms

  • Animals
  • Crows* / virology
  • Influenza A Virus, H5N1 Subtype* / classification
  • Influenza A Virus, H5N1 Subtype* / genetics
  • Influenza A Virus, H5N1 Subtype* / isolation & purification
  • Influenza A Virus, H5N1 Subtype* / pathogenicity
  • Influenza A virus / classification
  • Influenza A virus / genetics
  • Influenza in Birds* / epidemiology
  • Influenza in Birds* / virology
  • Japan / epidemiology
  • Phylogeny*