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Front Microbiol. 2016 May 19;7:754. doi: 10.3389/fmicb.2016.00754. eCollection 2016.
New Reassortant H5N6 Highly Pathogenic Avian Influenza Viruses in Southern China, 2014.
Jiao P1, Cui J1, Song Y1, Song H1, Zhao Z2, Wu S1, Qu N1, Wang N1, Ouyang G1, Liao M1.
Author information
Abstract
New reassortant H5N6 highly pathogenic avian influenza viruses (AIVs) were isolated from apparently healthy domestic ducks in Southern China in 2014. Our results show that the viruses grew efficiently in eggs and replicated systemically in chickens. They were completely lethal in chicken (100% mortality), and the mean death time was 6 to 7 days post-inoculation. The viruses could transmit in chickens by na?ve contact. BLAST analysis revealed that their HA gene was most closely related to A/wild duck/Shangdong/628/2011 (H5N1), and their NA genes were most closely related to A/swine/Guangdong/K6/2010 (H6N6). The other genes had the highest identity with A/wild duck/Fujian/1/2011(H5N1). The results of phylogenetic analysis showed that their HA genes clustered into clade 2.3.4.4 of the H5N1 viruses and all genes derived from H5 were Mix-like or H6-like viruses. Thus, the new H5N6 viruses were reassortmented of H5N1 and H6N6 virus. Therefore, the circulation of the new H5N6 AIVs may become a threat to poultry and human health.
KEYWORDS:
H5N6; ducks; evolution; highly pathogenic avian influenza virus; pathogenicity
PMID: 27242767 [PubMed] PMCID: PMC4872003 Free PMC Article
New Reassortant H5N6 Highly Pathogenic Avian Influenza Viruses in Southern China, 2014.
Jiao P1, Cui J1, Song Y1, Song H1, Zhao Z2, Wu S1, Qu N1, Wang N1, Ouyang G1, Liao M1.
Author information
Abstract
New reassortant H5N6 highly pathogenic avian influenza viruses (AIVs) were isolated from apparently healthy domestic ducks in Southern China in 2014. Our results show that the viruses grew efficiently in eggs and replicated systemically in chickens. They were completely lethal in chicken (100% mortality), and the mean death time was 6 to 7 days post-inoculation. The viruses could transmit in chickens by na?ve contact. BLAST analysis revealed that their HA gene was most closely related to A/wild duck/Shangdong/628/2011 (H5N1), and their NA genes were most closely related to A/swine/Guangdong/K6/2010 (H6N6). The other genes had the highest identity with A/wild duck/Fujian/1/2011(H5N1). The results of phylogenetic analysis showed that their HA genes clustered into clade 2.3.4.4 of the H5N1 viruses and all genes derived from H5 were Mix-like or H6-like viruses. Thus, the new H5N6 viruses were reassortmented of H5N1 and H6N6 virus. Therefore, the circulation of the new H5N6 AIVs may become a threat to poultry and human health.
KEYWORDS:
H5N6; ducks; evolution; highly pathogenic avian influenza virus; pathogenicity
PMID: 27242767 [PubMed] PMCID: PMC4872003 Free PMC Article