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Virus Genes. 2009 Feb;38(1):136-42. doi: 10.1007/s11262-008-0300-7. Epub 2008 Dec 9.

Genetic analysis of H3 subtype influenza viruses isolated from domestic ducks in northern China during 2004-2005.

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1
Laboratory of Infectious Diseases, College of Veterinary Medicine, China Agricultural University, Beijing, 100193, People's Republic of China.

Abstract

The broad distribution and prevalence of H3 subtype influenza viruses in avian and mammalian hosts constitutes a global threat to both human and veterinary health. In this present study, six H3N8 influenza viruses isolated from domestic ducks during 2004-2005 in northern China were genetically and phylogenetically characterized. Sequence analysis showed that HA, NA, and M genes of all the six H3N8 isolates had a close relationship with those of Equine/Jilin/1/89 (H3N8) virus, which once caused outbreak in equine populations in northern China. The PB2 and PA genes of the viruses possessed the highest similarities with highly pathogenic avian H5N1 influenza viruses currently circulating in this region. These findings emphasize the importance of avian influenza virus surveillance in this region for understanding the genesis and emergency of novel reassortants with pandemic potential.

PMID:
19067150
DOI:
10.1007/s11262-008-0300-7
[Indexed for MEDLINE]

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