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  • Title: [Circulation of the influenza A virus of H13 serosubtype among seagulls in the Northern Caspian (1979-1985)].
    Author: Iamnikova SS, Kovtun TO, Dmitriev GA, Aristova VA, Krivonosov GA, Rusanov GM, Konechnyĭ AG, L'vov DK.
    Journal: Vopr Virusol; 1989; 34(4):426-30. PubMed ID: 2531497.
    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.
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