Article
Characterization of H9N2 influenza A viruses isolated from chicken products imported into Japan from China.
Epidemiology and infection - 1 Apr 2007
Mase M, Eto M, Imai K, Tsukamoto K, Yamaguchi S
Abstract excerpt
We characterized eleven H9N2 influenza A viruses isolated from chicken products imported from China. Genetically they were classified into six distinct genotypes, including five already known genotypes and one novel genotype. This suggested that such multiple genotypes of the H9N2 virus have possibly already become widespread and endemic in China. Two isolates have amino-acid substitutions that confer resistance...
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