title: Genetic characterization of H1N2 influenza A viruses isolated from pigs throughout the United States.
abstract: An H1N2 influenza A virus was isolated from a pig in the United States for the first time in 1999 (A. I. Karasin, G. A. Anderson, and C. W. Olsen, J. Clin. Microbiol. 38:2453-2456, 2000). H1N2 viruses have been isolated subsequently from pigs in many states. Phylogenetic analyses of eight such viruses isolated from pigs in Indiana, Illinois, Minnesota, Ohio, Iowa, and North Carolina during 2000 to 2001 showed that these viruses are all of the same reassortant genotype as that of the initial H1N2 isolate from 1999.
authors.affiliation: Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison 53706, USA.
authors.forename: Alexander I
authors.initials: AI
authors.lastname: Karasin
authors.forename: John
authors.initials: J
authors.lastname: Landgraf
authors.forename: Sabrina
authors.initials: S
authors.lastname: Swenson
authors.forename: Gene
authors.initials: G
authors.lastname: Erickson
authors.forename: Sagar
authors.initials: S
authors.lastname: Goyal
authors.forename: Mary
authors.initials: M
authors.lastname: Woodruff
authors.forename: Gail
authors.initials: G
authors.lastname: Scherba
authors.forename: Gary
authors.initials: G
authors.lastname: Anderson
authors.forename: Christopher W
authors.initials: CW
authors.lastname: Olsen
mesh_terms: D000818:Animals; D002460:Cell Line; D004285:Dogs; D009980:Influenza A virus / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D010802:Phylogeny; D013552:Swine / Q000821:virology*