Influenza A(H3N2) Virus in Swine at Agricultural Fairs and Transmission to Humans, Michigan and Ohio, USA, 2016

Emerg Infect Dis. 2017 Sep;23(9):1551-1555. doi: 10.3201/eid2309.170847.

Abstract

In 2016, a total of 18 human infections with influenza A(H3N2) virus occurred after exposure to influenza-infected swine at 7 agricultural fairs. Sixteen of these cases were the result of infection by a reassorted virus with increasing prevalence among US swine containing a hemagglutinin gene from 2010-11 human seasonal H3N2 strains.

Keywords: Michigan; Ohio; RNA viruses; United States; agricultural fair; animal population groups; animals; disease outbreaks; influenza A virus; livestock; public health; respiratory infections; swine; zoonoses.

MeSH terms

  • Animal Husbandry
  • Animals
  • Disease Outbreaks
  • Epidemiological Monitoring
  • Humans
  • Influenza A Virus, H3N2 Subtype / classification*
  • Influenza A Virus, H3N2 Subtype / genetics
  • Influenza A Virus, H3N2 Subtype / isolation & purification
  • Influenza, Human / epidemiology*
  • Influenza, Human / transmission
  • Influenza, Human / virology
  • Michigan / epidemiology
  • Ohio / epidemiology
  • Orthomyxoviridae Infections / epidemiology*
  • Orthomyxoviridae Infections / transmission
  • Orthomyxoviridae Infections / virology
  • Phylogeny
  • Reassortant Viruses / classification*
  • Reassortant Viruses / genetics
  • Reassortant Viruses / isolation & purification
  • Swine
  • Swine Diseases / epidemiology*
  • Swine Diseases / transmission
  • Swine Diseases / virology