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Novel triple-reassortant influenza viruses in pigs, Guangxi, China
Received: 01 December 2017 Revised: 10 February 2018 Accepted: 12 April 2018 Published: 16 May 2018
Abstract
Considered a ?mixing vessel? for influenza viruses, pigs can give rise to new influenza virus reassortants that can threaten humans. During our surveillance of pigs in Guangxi, China from 2013 to 2015, we isolated 11 H1N1 and three H3N2 influenza A viruses of swine origin (IAVs-S). Out of the 14, we detected ten novel triple-reassortant viruses, which contained surface genes (hemagglutinin and neuraminidase) from Eurasian avian-like (EA) H1N1 or seasonal human-like H3N2, matrix (M) genes from H1N1/2009 pandemic or EA H1N1, nonstructural (NS) genes from classical swine, and the remaining genes from H1N1/2009 pandemic. Mouse studies indicate that these IAVs-S replicate efficiently without prior adaptation, with some isolates demonstrating lethality. Notably, the reassortant EA H1N1 viruses with EA-like M gene have been reported in human infections. Further investigations will help to assess the potential risk of these novel triple-reassortant viruses to humans.
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- Ping He,
- Guojun Wang,
- Yanning Mo,
- Qingxiong Yu,
- Xiong Xiao,
- Wenjuan Yang,
- Weifeng Zhao,
- Xuan Guo,
- Qiong Chen,
- Jianqiao He,
- Mingli Liang,
- Jian Zhu,
- Yangbao Ding,
- Zuzhang Wei,
- Kang Ouyang,
- Fang Liu,
- Hui Jian,
- Weijian Huang,
- Adolfo Garc?a-Sastre &
- Ying Chen
- Emerging Microbes & Infectionsvolume 7, Article number: 85 (2018)
- doi:10.1038/s41426-018-0088-z
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Received: 01 December 2017 Revised: 10 February 2018 Accepted: 12 April 2018 Published: 16 May 2018
Abstract
Considered a ?mixing vessel? for influenza viruses, pigs can give rise to new influenza virus reassortants that can threaten humans. During our surveillance of pigs in Guangxi, China from 2013 to 2015, we isolated 11 H1N1 and three H3N2 influenza A viruses of swine origin (IAVs-S). Out of the 14, we detected ten novel triple-reassortant viruses, which contained surface genes (hemagglutinin and neuraminidase) from Eurasian avian-like (EA) H1N1 or seasonal human-like H3N2, matrix (M) genes from H1N1/2009 pandemic or EA H1N1, nonstructural (NS) genes from classical swine, and the remaining genes from H1N1/2009 pandemic. Mouse studies indicate that these IAVs-S replicate efficiently without prior adaptation, with some isolates demonstrating lethality. Notably, the reassortant EA H1N1 viruses with EA-like M gene have been reported in human infections. Further investigations will help to assess the potential risk of these novel triple-reassortant viruses to humans.
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