title: Influenza Virus Surveillance in Coordinated Swine Production Systems, United States.
abstract: To clarify the epidemiology of influenza A viruses in coordinated swine production systems to which no animals from outside the system are introduced, we conducted virologic surveillance during September 2012-September 2013. Animal age, geographic location, and farm type were found to affect the prevalence of these viruses.
authors.forename: Bryan S
authors.initials: BS
authors.lastname: Kaplan
authors.forename: Jennifer
authors.initials: J
authors.lastname: DeBeauchamp
authors.forename: Evelyn
authors.initials: E
authors.lastname: Stigger-Rosser
authors.forename: John
authors.initials: J
authors.lastname: Franks
authors.forename: Jeri Carol
authors.initials: JC
authors.lastname: Crumpton
authors.forename: Jasmine
authors.initials: J
authors.lastname: Turner
authors.forename: Daniel
authors.initials: D
authors.lastname: Darnell
authors.forename: Trushar
authors.initials: T
authors.lastname: Jeevan
authors.forename: Ghazi
authors.initials: G
authors.lastname: Kayali
authors.forename: Abbey
authors.initials: A
authors.lastname: Harding
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Webby
authors.forename: James F
authors.initials: JF
authors.lastname: Lowe
mesh_terms: D000818:Animals; D062665:Epidemiological Monitoring; D009980:Influenza A virus / Q000472:pathogenicity*; D058751:Livestock / Q000821:virology*; D009976:Orthomyxoviridae Infections / Q000662:veterinary*; D013552:Swine / Q000821:virology*; D013553:Swine Diseases / Q000453:epidemiology*; D014481:United States / Q000453:epidemiology
keywords: H1N1; H3N2; North America; United States; influenza; surveillance; swine; viruses; zoonoses