H7N1 Low Pathogenicity Avian Influenza Viruses in Poultry in the United States During 2018

Avian Dis. 2021 Mar;65(1):59-62. doi: 10.1637/aviandiseases-D-20-00088.

Abstract

Here, we report three detections of H7N1 low pathogenicity avian influenza viruses (LPAIV) from poultry in Missouri (n = 2) and Texas (n = 1) during February and March 2018. Complete genome sequencing and comparative phylogenetic analysis suggest that the H7 LPAIV precursor viruses were circulating in wild birds in North America during the fall and winter of 2017 and spilled over into domestic poultry in Texas and Missouri independently during the spring of 2018.

Nota de investigación—Virus de la influenza aviar de baja patogenicidad H7N1 en avicultura, Estados Unidos, 2018. En este artículo se reportan tres detecciones del virus de influenza aviar de baja patogenicidad H7N1 (LPAIV) en avicultura en Missouri (n = 2) y Texas (n = 1) durante febrero y marzo del 2018. La secuenciación completa del genoma y el análisis filogenético comparativo sugieren que precursores de este virus de influenza de baja patogenicidad H7 circulaban en aves silvestres en América del Norte durante el otoño y el invierno de 2017 y se propagaron a las aves comerciales en Texas y Missouri de forma independiente durante la primavera del 2018.

Keywords: H7N1; avian influenza virus; influenza A virus; low pathogenicity avian influenza virus; phylogenetic analysis; poultry.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Animals
  • Chickens*
  • Influenza A Virus, H7N1 Subtype / isolation & purification*
  • Influenza A Virus, H7N1 Subtype / pathogenicity
  • Influenza in Birds / virology*
  • Missouri
  • Poultry Diseases / virology*
  • Texas
  • Turkeys*
  • Virulence