title: [Isolation of influenza virus with the antigenic formula Hav4 Nav2 and Hav5 Nav2 during epizootic infection among sea gulls in the Astrakhan district in the summer of 1976].
abstract: Virological examinations of nesting colonies of Laridae birds in the avandelta of the Volga, Astrakhan region, during an epizootic in July, 1976, yielded 5 strains of influenza virus: 3 from Sterna albifrons, 1 from S. hirundo and 1 from Larus genei, identical with A/Sterna hirundo/S. Africa/61 (Hav5 Nav2) virus. At the same period two strains were isolated from Larus genei showing a previously unknown composition of the surface antigens: Hav4 Nav2. All the strains were isolated only from cloacal washings.
mesh_terms: D000818:Animals; D000954:Antigens, Surface; D000956:Antigens, Viral; D001715:Bird Diseases / Q000382:microbiology*; D001717:Birds; D004196:Disease Outbreaks; D009980:Influenza A virus / Q000145:classification / Q000276:immunology / Q000302:isolation & purification*; D009976:Orthomyxoviridae Infections / Q000382:microbiology / Q000662:veterinary*; D012426:Russia; D012621:Seasons
chemical_list: D000954:Antigens, Surface; D000956:Antigens, Viral
vernacular_title: Izoliatsiia virusa grippa s antigennoĭ formuloĭ Hav4 Nav2 i Hav5 Nav2 v period epizootii sredi chaĭkovykh ptits letom 1976 g. v Astrakhanskoĭ oblasti.