Literature DB >> 19342072

Characterization of a highly pathogenic avian influenza H5N1 virus sublineage in poultry seized at ports of entry into Vietnam.

Tung Nguyen1, C Todd Davis, William Stembridge, Bo Shu, Amanda Balish, Kenjiro Inui, Hoa T Do, Huong T Ngo, Xiu-Feng Wan, Margaret McCarron, Stephen E Lindstrom, Nancy J Cox, Cam V Nguyen, Alexander I Klimov, Ruben O Donis.   

Abstract

Highly pathogenic avian influenza H5N1 virus was detected in poultry seized at two ports of entry located in Lang Son Province, Vietnam. Sequence analysis of the hemagglutinin (HA) genes from five H5N1 virus isolates and ten PCR amplicons from chicken cloacal samples revealed their close phylogenetic relationship to clade 7 H5N1 HA genes. However, these HA genes exhibited extensive genetic divergence at both the nucleotide and amino acid levels in comparison to previously described clade 7 viruses; e.g., A/chicken/Shanxi/2/2006. In addition, hemagglutination inhibition tests revealed antigenic differences between these and previously isolated H5N1 viruses from Vietnam. These results indicate that viruses with clade 7 HA are evolving rapidly in poultry in Southeast Asia.

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Year:  2009        PMID： 19342072     DOI： 10.1016/j.virol.2009.03.006

Source DB:  PubMed          Journal:  Virology        ISSN： 0042-6822            Impact factor:   3.616


  18 in total

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