| an outbreak of highly pathogenic avian influenza in australia in 1997 caused by an h7n4 virus. | in november of 1997 an outbreak of highly pathogenic avian influenza occurred near the town of tamworth, in northern new south wales, australia. the viruses isolated from chickens on two commercial chicken farms were identified as h7n4 viruses, with hemagglutinin cleavage site amino acid sequences of rkrkrg and intravenous pathogenicity indices of 2.52 and 2.90, respectively. a virus with an identical nucleotide sequence, but with an intravenous pathogenicity index of 1.30, was also isolated fro ... | 2003 | 14575068 |
| avian influenza in the western hemisphere including the pacific islands and australia. | between 1997 and 2001, there was one report of highly pathogenic avian influenza (hpai) in the western hemisphere and pacific basin. in 1997, in new south wales, australia, an outbreak caused by avian influenza (ai) virus subtype h7n4 involved both chickens and emus. all other reports of infections in poultry and isolations from wild bird species in the region pertained to low pathogenicity (lp) ai virus. animal health officials in canada reported isolations of subtypes h1, h6, h7, and h10 from ... | 2003 | 14575067 |