phylogenetic analyses of genes from south african lpai viruses isolated in 2004 from wild aquatic birds suggests introduction by eurasian 2004, south africa experienced its first recorded outbreak of a highly pathogenic notifiable avian influenza (hpnai) viral strain of the h5n2 subtype in ostriches in the eastern cape province. the traditional ostrich-farming areas in the western cape province report almost yearly outbreaks of low pathogenicity avian influenza (lpai) in ostriches, which is attributed to introduction by wild birds and certain climatic patterns. during the winter of 2004, lpai h3n8, h4n8, h5n2 and h5n1 avian inf ...200616447511
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