title: High prevalence of influenza A virus in ducks caught during spring migration through Sweden.
abstract: As part of our ongoing screening of wild birds in Northern Europe, 358 mallards (Anas platyrhynchos) and 203 shelducks (Tadorna tadorna) were caught in southern Sweden during the spring 2003. Faecal samples were analyzed by real time RT-PCR for the presence of influenza A virus. In contrast to what has been found in North American studies; Eurasian spring migrating ducks passing through Sweden had a relatively high prevalence of influenza A virus.
authors.affiliation: Smedby Health Center, Kalmar County Council, SE-39471 Kalmar, Sweden. anderswal@ltkalmar.se
authors.forename: Anders
authors.initials: A
authors.lastname: Wallensten
authors.forename: Vincent J
authors.initials: VJ
authors.lastname: Munster
authors.forename: Malin
authors.initials: M
authors.lastname: Karlsson
authors.forename: Ake
authors.initials: A
authors.lastname: Lundkvist
authors.forename: Mia
authors.initials: M
authors.lastname: Brytting
authors.forename: Martin
authors.initials: M
authors.lastname: Stervander
authors.forename: Albert D M E
authors.initials: AD
authors.lastname: Osterhaus
authors.forename: Ron A M
authors.initials: RA
authors.lastname: Fouchier
authors.forename: Björn
authors.initials: B
authors.lastname: Olsen
mesh_terms: D000818:Animals; D001715:Bird Diseases / Q000453:epidemiology / Q000821:virology; D004197:Disease Reservoirs / Q000662:veterinary*; D004372:Ducks / Q000821:virology*; D005243:Feces / Q000821:virology; D009980:Influenza A virus / Q000235:genetics / Q000302:isolation & purification*; D005585:Influenza in Birds / Q000453:epidemiology* / Q000635:transmission; D015995:Prevalence; D012621:Seasons; D013548:Sweden / Q000453:epidemiology