| detection and characterization of clade 7 high pathogenicity avian influenza h5n1 viruses in chickens seized at ports of entry and live poultry markets in vietnam. | high pathogenicity avian influenza h5n1 has become an endemic poultry disease in several asian countries, including vietnam. recently, dade 7 h5n1 viruses of the eurasian lineage were isolated from chickens seized at ports of entry in lang son province, vietnam. extensive nucleotide and amino acid divergence across the hemagglutinin (ha) protein gene of these isolates in comparison to previously described clade 7 viruses was identified. clade 7 viruses are antigenically distinct from contemporar ... | 2010 | 20521651 |