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He Z, Wang X, Lin Y, Feng S, Huang X, Zhao L, Zhang J, Ding Y, Li W, Yuan R, Jiao P. Genetic characteristics of waterfowl-origin H5N6 highly pathogenic avian influenza viruses and their pathogenesis in ducks and chickens. Front Microbiol 2023; 14:1211355. [PMID: 37405154 PMCID: PMC10315182 DOI: 10.3389/fmicb.2023.1211355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 05/22/2023] [Indexed: 07/06/2023] Open
Abstract
Waterfowl, such as ducks, are natural hosts for avian influenza viruses (AIVs) and act as a bridge for transmitting the virus to humans or susceptible chickens. Since 2013, chickens and ducks have been threatened by waterfowl-origin H5N6 subtype AIVs in China. Therefore, it is necessary to investigate the genetic evolution, transmission, and pathogenicity of these viruses. In this study, we determined the genetic characteristics, transmission, and pathogenicity of waterfowl-origin H5N6 viruses in southern China. The hemagglutinin (HA) genes of H5N6 viruses were classified into the MIX-like branch of clade 2.3.4.4h. The neuraminidase (NA) genes belonged to the Eurasian lineage. The PB1 genes were classified into MIX-like and VN 2014-like branches. The remaining five genes were clustered into the MIX-like branch. Therefore, these viruses belonged to different genotypes. The cleavage site of the HA proteins of these viruses was RERRRKR/G, a molecular characteristic of the H5 highly pathogenic AIV. The NA stalk of all H5N6 viruses contained 11 amino acid deletions at residues 58-68. All viruses contained 627E and 701D in the PB2 proteins, which were molecular characteristics of typical bird AIVs. Furthermore, this study showed that Q135 and S23 viruses could replicate systematically in chickens and ducks. They did not cause death in ducks but induced mild clinical signs in them. All the infected chickens showed severe clinical signs and died. These viruses were shed from the digestive and respiratory tracts and transmitted horizontally in chickens and ducks. Our results provide valuable information for preventing H5N6 avian influenza outbreaks.
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Affiliation(s)
- Zhuoliang He
- College of Veterinary Medicine, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Zoonosis Prevention and Control, Guangzhou, China
| | - Xia Wang
- College of Veterinary Medicine, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Yu Lin
- College of Veterinary Medicine, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Siyu Feng
- College of Veterinary Medicine, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Xinyu Huang
- College of Veterinary Medicine, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Luxiang Zhao
- College of Veterinary Medicine, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Junsheng Zhang
- College of Veterinary Medicine, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Yangbao Ding
- College of Veterinary Medicine, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Weiqiang Li
- College of Veterinary Medicine, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
| | - Runyu Yuan
- Guangdong Provincial Institution of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Peirong Jiao
- College of Veterinary Medicine, Guangdong Laboratory for Lingnan Modern Agriculture, South China Agricultural University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Zoonosis Prevention and Control, Guangzhou, China
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Yu JL, Hou S, Feng YT, Bu G, Chen QQ, Meng ZQ, Ding ZT, Guo LZ, Zhou X, Wang M, Huang XE, Li WW, He L, Gong L, Sun Y, Xu Z, Pan HF, He J, Wu JB. Emergence of a young case infected with avian influenza A (H5N6) in Anhui Province, East China during the COVID-19 pandemic. J Med Virol 2021; 93:5998-6007. [PMID: 34232513 PMCID: PMC8426836 DOI: 10.1002/jmv.27179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 07/02/2021] [Indexed: 12/14/2022]
Abstract
In the context of the coronavirus disease 2019 pandemic, we investigated the epidemiological and clinical characteristics of a young patient infected by avian influenza A (H5N6) virus in Anhui Province, East China, and analyzed genomic features of the pathogen in 2020. Through the cross‐sectional investigation of external environment monitoring (December 29–31, 2020), 1909 samples were collected from Fuyang City. It was found that the positive rate of H5N6 was higher than other areas obviously in Tianma poultry market, where the case appeared. In addition, dual coinfections were detected with a 0.057% polymerase chain reaction positive rate the surveillance years. The virus was the clade 2.3.4.4, which was most likely formed by genetic reassortment between H5N6 and H9N2 viruses. This study found that the evolution rates of the hemagglutinin and neuraminidase genes of the virus were higher than those of common seasonal influenza viruses. The virus was still highly pathogenic to poultry and had a preference for avian receptor binding. Various avian influenza virus (AIV) subtypes naturally have caused zoonotic infections, but the subtypes H5N1 and H7N9 have caused a prominent impact. At present, the outbreak of novel coronavirus pneumonia (coronavirus disease 2019 [COVID‐19]) has caused a worldwide pandemic. To our knowledge, this is the youngest child infected with H5N6 subtype avian influenza in Anhui Province. Herein, we analyzed the epidemiology of the case and the characteristics of the pathogen genome, to find out the possible evolution of the virus.
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Affiliation(s)
- Jun-Ling Yu
- Microbiological Laboratory, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China.,Microbiological Laboratory, Public Health Research Institute of Anhui Province, Hefei, Anhui, China
| | - Sai Hou
- Microbiological Laboratory, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China.,Microbiological Laboratory, Public Health Research Institute of Anhui Province, Hefei, Anhui, China
| | - Ya-Ting Feng
- Department of Epidemiolgy and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China.,Inflammation and Immune Mediated Diseases Laboratory, Anhui Medical University, Hefei, Anhui, China
| | - Ge Bu
- Microbiological Laboratory, Fuyang City Center for Disease Control and Prevention, Fuyang, Anhui, China
| | - Qing-Qing Chen
- Microbiological Laboratory, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China.,Microbiological Laboratory, Public Health Research Institute of Anhui Province, Hefei, Anhui, China
| | - Zhao-Qian Meng
- Microbiological Laboratory, Fuyang City Center for Disease Control and Prevention, Fuyang, Anhui, China
| | - Zhen-Tao Ding
- Microbiological Laboratory, Fuyang City Center for Disease Control and Prevention, Fuyang, Anhui, China
| | - Liang-Zi Guo
- Microbiological Laboratory, Fuyang City Center for Disease Control and Prevention, Fuyang, Anhui, China
| | - Xue Zhou
- Microbiological Laboratory, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China.,Microbiological Laboratory, Public Health Research Institute of Anhui Province, Hefei, Anhui, China
| | - Meng Wang
- Microbiological Laboratory, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China.,Microbiological Laboratory, Public Health Research Institute of Anhui Province, Hefei, Anhui, China
| | - Xin-Er Huang
- Department of Epidemiolgy and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China.,Inflammation and Immune Mediated Diseases Laboratory, Anhui Medical University, Hefei, Anhui, China
| | - Wei-Wei Li
- Microbiological Laboratory, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China.,Microbiological Laboratory, Public Health Research Institute of Anhui Province, Hefei, Anhui, China
| | - Lan He
- Microbiological Laboratory, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China.,Microbiological Laboratory, Public Health Research Institute of Anhui Province, Hefei, Anhui, China
| | - Lei Gong
- Microbiological Laboratory, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China.,Microbiological Laboratory, Public Health Research Institute of Anhui Province, Hefei, Anhui, China
| | - Yong Sun
- Microbiological Laboratory, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China.,Microbiological Laboratory, Public Health Research Institute of Anhui Province, Hefei, Anhui, China
| | - Zhiwei Xu
- School of Public Health, Faculty of Medicine, University of Queensland, Brisbane, Queensland, Australia
| | - Hai-Feng Pan
- Department of Epidemiolgy and Biostatistics, School of Public Health, Anhui Medical University, Hefei, Anhui, China.,Inflammation and Immune Mediated Diseases Laboratory, Anhui Medical University, Hefei, Anhui, China
| | - Jun He
- Microbiological Laboratory, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China.,Microbiological Laboratory, Public Health Research Institute of Anhui Province, Hefei, Anhui, China
| | - Jia-Bing Wu
- Microbiological Laboratory, Anhui Provincial Center for Disease Control and Prevention, Hefei, Anhui, China.,Microbiological Laboratory, Public Health Research Institute of Anhui Province, Hefei, Anhui, China
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