| risk factors for seropositivity to h5 avian influenza virus in ostrich farms in the western cape province, south africa. | in a 2005 serological survey, carried out in response to an outbreak of h5n2 avian influenza (ai) in ostriches in the eastern cape province, 16.3% of ostrich farms in the western cape province of south africa were found to be seropositive to h5 ai virus. we subsequently carried out a questionnaire-based census survey on all available registered western cape ostrich farms that still existed at the end of 2005 (367 farms, of which 82 were seropositive), in order to identify risk factors associated ... | 2008 | 18486977 |
| characterisation of a highly pathogenic influenza a virus of subtype h5n2 isolated from ostriches in south africa in 2004. | the hpai h5n2 strain that caused an outbreak in ostriches of the eastern cape province, south africa in 2004 was characterized. | 2009 | 19496843 |
| phylogenetic analyses of genes from south african lpai viruses isolated in 2004 from wild aquatic birds suggests introduction by eurasian migrants. | in 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 ... | 2006 | 16447511 |
| molecular characterization of h5n2 avian influenza viruses isolated from south african ostriches in 2006. | highly pathogenic avian influenza (hpai) h5n2 reemerged in ostriches in south africa during 2006, and a low-pathogenic ai h5n2 virus was also isolated. molecular and phylogenetic characterization was performed to determine whether the outbreak strains were genetically derived from the supposedly eradicated eastern cape ostrich outbreak hpai h5n2 strain of 2004. it was demonstrated that although the 2004 and 2006 south african h5n2 strains shared a common ancestor, the two outbreaks were not rela ... | 2007 | 18251396 |