title: Influenza A/H1N1pdm virus in Russian Asia in 2009-2010.
abstract: In total 3566 blood sera samples were collected in the Russian Far East and Central and Western Siberia in 2009-2010. The presence of antibodies to influenza A/H1N1pdm, seasonal H1N1 and H3N2 influenza viruses in the sera was tested in the hemagglutination inhibition test. 29.5% of samples from the Far East were positive to pandemic influenza, this value for Central and Western Siberia is 2-fold lower (12.8% and 11%, respectively). Fifty-six influenza A/H1N1pdm viruses were isolated during 2009-2010 from samples collected in Central and Western Siberia and the Russian Far East. Molecular and genetic properties of 23 strains were studied. Nucleotide and amino-acid sequences of pandemic influenza virus strains were identical (99% identity or more) to reference strain A/California/04/2009. Sporadic substitutions in antigenic sites were detected but did not change antigenic characteristics of strains.
authors: State Research Center of Virology and Biotechnology Vector, Koltsovo, Novosibirsk Region 630559, Russia. ilyichev@mail.ru
authors: T
authors: T
authors: Ilyicheva
authors: I
authors: I
authors: Susloparov
authors: A
authors: A
authors: Durymanov
authors: A
authors: A
authors: Romanovskaya
authors: K
authors: K
authors: Sharshov
authors: O
authors: O
authors: Kurskaya
authors: M
authors: M
authors: Ignashkina
authors: A
authors: A
authors: Shestopalov