Zhu C, Hu C, Gui B, Chen Q, Zhang S, He G. Genetic characteristics of H9N2 avian influenza viruses isolated from free-range poultry in Eastern China, in 2014-2015. Poult Sci. 2018 Aug 30
Circulating H7N9 influenza viruses in live poultry markets continue to pose a threat to human health. Free-range poultry, one of the sources for these markets, are common in China as well as in many developing countries. Because the H9N2 virus could be a source of internal genes for the H7N9 virus, we conducted surveillance in free-range poultry and live poultry markets to study the evolution of H7N9 and H9N2 viruses in Eastern China. We found 28 samples positive for the H9N2 virus (a rate of 3.2%), but no positive samples for the H7N9 virus. Six representative H9N2 isolates were sequenced and analyzed, and the results showed that these viruses shared high nucleotide identities (99.0 to 100%) and were in a same branch in the phylogenetic trees. All these 6 viruses are closely clustered with Zhejiang H9N2 chicken isolates, and belonged to genotype G57, along with some novel H7N9 strains and H9N2 strains circulating in humans in China. We hope that surveillance of AIVs in free-range poultry will be strengthened for further identification more genetic diversity.
See Also:
Latest articles in those days:
- Structures of H5N1 influenza polymerase with ANP32B reveal mechanisms of genome replication and host adaptation 9 hours ago
- Risk assessment of a highly pathogenic H5N1 influenza virus from mink 9 hours ago
- Detection of clade 2.3.4.4b highly pathogenic H5N1 influenza virus in New York City 9 hours ago
- Sequence-based epitope mapping of high pathogenicity avian influenza H5 clade 2.3.4.4b in Latin America 1 days ago
- Guanylate-binding protein 1 inhibits inflammatory factors produced by H5N1 virus through Its GTPase activity 1 days ago
[Go Top] [Close Window]