title: [Circulation of the influenza A virus of H13 serosubtype among seagulls in the Northern Caspian (1979-1985)].
abstract: The results of seven-year ecologo-virological studies (1979-1985) of Laridae colonies on the island Zhemchuzhnyi, northern Kaspian Sea, showed annual isolation of influenza A viruses. Altogether, 95 hemagglutinating agent have been isolated. Strains with 4 different combinations of surface antigens were identified: H5N2, H13N2, H13N3, H13N6. The possibility of transovarial transmission is confirmed by the fact of isolation of an influenza virus strain A/black-headed herring gull/Astrakhan/458/85 (H13N6) from a nestling having no contacts with the environment. Simultaneous circulation of influenza A viruses (in 1983--H13N2 and H13N6, in 1985.--H13N3 and H13N6) and the presence in the virion of neuraminidase of human influenza virus (N2) allow to consider the isolates to be natural recombinants.
authors.forename: S S
authors.initials: SS
authors.lastname: Iamnikova
authors.forename: T O
authors.initials: TO
authors.lastname: Kovtun
authors.forename: G A
authors.initials: GA
authors.lastname: Dmitriev
authors.forename: V A
authors.initials: VA
authors.lastname: Aristova
authors.forename: G A
authors.initials: GA
authors.lastname: Krivonosov
authors.forename: G M
authors.initials: GM
authors.lastname: Rusanov
authors.forename: A G
authors.initials: AG
authors.lastname: Konechnyĭ
authors.forename: D K
authors.initials: DK
authors.lastname: L'vov
mesh_terms: D000818:Animals; D001717:Birds / Q000382:microbiology*; D006389:Hemagglutinins, Viral / Q000302:isolation & purification; D009980:Influenza A virus / Q000302:isolation & purification*; D005585:Influenza in Birds / Q000453:epidemiology*; D012426:Russia
chemical_list: D006389:Hemagglutinins, Viral
vernacular_title: Tsirkuliatsiia virusa grippa A seropodtipa H13 sredi chaĭkovykh ptits severnogo kaspiia (1979-1985 gg.).