Characterisation of influenza A viruses isolated from turkeys in England during March-May 1979.
作者： D.J. Alexander , D. Spackman
DOI: 10.1080/03079458108418477
关键词: Virology 、 Influenza a 、 Virulence 、 Pathogenicity 、 Biology 、 Virus 、 Veterinary medicine
摘要: During the early spring of 1979 turkeys on at least twelve sites in England became infected with influenza A viruses. On five these no virus was isolated but birds were shown to have antibodies Havl (four sites) and Hav2 antigenic subtypes The eight viruses typed: A/turkey/England/192-328/79 (Havl Nav2/3), A/turkey/England/192-329/79 (Hav1 N2), A/turkey/England/199/79 Neq1), A/turkey/ England/214/79 A/turkey/England/250/79 (Hsw1 N1), A/turkey/England/262/79 A/turkey/England/272/79 A/turkey/England/384/79 (Hav2 Nav4). Pathogenicity index tests 6-week-old chickens agreed clinical signs seen field. Three isolates: 199, 214 272 extremely high virulence, 384 showed intermediate while other isolates low virulence.
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