Brief Report

Archives of Virology

, Volume 116, Issue 1, pp 261-265

Influenza viral infection of swine in the United States 1988–1989

  • T. M. ChambersAffiliated withDepartment of Virology and Molecular Biology, St. Jude Children's Research Hospital
  • , Virginia S. HinshawAffiliated withDepartment of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison
  • , Y. KawaokaAffiliated withDepartment of Virology and Molecular Biology, St. Jude Children's Research Hospital
  • , B. C. EasterdayAffiliated withDepartment of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison
  • , R. G. WebsterAffiliated withDepartment of Virology and Molecular Biology, St. Jude Children's Research Hospital

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Summary

Swine are an animal reservoir for influenza viruses capable of causing disease in humans. A serological survey in 1988–1989 demonstrates that subtype H1 influenza viruses continue to circulate at high frequency among swine in the north-central U.S.A. (average 51% incidence). Subtype H3 viruses antigenically similar to current human H3 viruses are circulating at low frequency (average 1.1%), particularly in the southeast U.S.A.