Recent studies in this journal revealed that some H7N9 viruses reassorted with duck AIVs, and then attained the ability to efficiently infect ducks.
- Hou G.
- Li J.
- Wang S.
- Cheng S.
- Peng C.
- Chen J.
- et al.
Hemagglutinin characteristics, changes in pathogenicity, and antigenic variation of highly pathogenic H7N9 avian influenza viruses in China.
J Infect. 2019; 78: 158-169
2H7N9 AIVs have been endemic in chicken since their emergence in China in February 2013.
- He L.
- Liu D.
- Hu J.
- Shi L.
- Liu J.
- Cai T.
- et al.
Two novel reassortant high pathogenic H7N9 viruses isolated in Southern China in fifth wave shows internal genomic diversity and high virulence in chickens and ducks.
J Infect. 2018; 77: 561-571
3After its emergence, H7N9 viruses have evolved substantially, and have frequently reassorted, acquiring internal genes from other chicken H9N2 viruses, increasing the genetic diversity of H7N9 viruses.
- Gao R.
- Cao B.
- Hu Y.
- Feng Z.
- Wang D.
- Hu W.
- et al.
Human infection with a novel avian-origin influenza A (H7N9) virus.
N Engl J Med. 2013; 368: 1888-1897
4This raises the concern that whether H7N9 can attain internal genes from other AIVs. Thus, we collected all available H7N9 sequences to detect potential novel reassortments of the H7N9 AIVs, and found evidences that three human-isolated H7N9 isolates attained internal genes from duck and human AIVs.
- Xiang D.
- Pu Z.
- Luo T.
- Guo F.
- Li X.
- Shen X.
- et al.
Evolutionary dynamics of avian influenza A H7N9 virus across five waves in mainland China, 2013–2017.
J Infect. 2018; 77: 205-211
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- Hemagglutinin characteristics, changes in pathogenicity, and antigenic variation of highly pathogenic H7N9 avian influenza viruses in China.J Infect. 2019; 78: 158-169
- Two novel reassortant high pathogenic H7N9 viruses isolated in Southern China in fifth wave shows internal genomic diversity and high virulence in chickens and ducks.J Infect. 2018; 77: 561-571
- Human infection with a novel avian-origin influenza A (H7N9) virus.N Engl J Med. 2013; 368: 1888-1897
- Evolutionary dynamics of avian influenza A H7N9 virus across five waves in mainland China, 2013–2017.J Infect. 2018; 77: 205-211
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Published online: March 14, 2019
Accepted: March 12, 2019
© 2019 The British Infection Association. Published by Elsevier Ltd. All rights reserved.