| characterization of a highly pathogenic avian influenza h5n1 clade 2.3.4 virus isolated from a tree sparrow. | the spread of h5n1 virus into a wide range of avian and mammalian species may facilitate the adaptation of the virus to human populations. in the present study, a survey of avian influenza virus in tree sparrows was performed and a hpai h5n1 virus (a/tree sparrow/jiangsu/1/08) was isolated. the h5n1 virus was found to be a genotype v variant belonging to clade 2.3.4, which had newly emerged in southern china in 2005. genetic analysis showed that it had a close relation with a/jiangsu/1/07 (h5n1) ... | 2010 | 19804800 |