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Lin S, Chen J, Li K, Liu Y, Fu S, Xie S, Zha A, Xin A, Han X, Shi Y, Xu L, Liao M, Jia W. Evolutionary dynamics and comparative pathogenicity of clade 2.3.4.4b H5 subtype avian influenza viruses, China, 2021-2022. Virol Sin 2024; 39:358-368. [PMID: 38679333 DOI: 10.1016/j.virs.2024.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 04/18/2024] [Indexed: 05/01/2024] Open
Abstract
The recent concurrent emergence of H5N1, H5N6, and H5N8 avian influenza viruses (AIVs) has led to significant avian mortality globally. Since 2020, frequent human-animal interactions have been documented. To gain insight into the novel H5 subtype AIVs (i.e., H5N1, H5N6 and H5N8), we collected 6102 samples from various regions of China between January 2021 and September 2022, and identified 41 H5Nx strains. Comparative analyses on the evolution and biological properties of these isolates were conducted. Phylogenetic analysis revealed that the 41 H5Nx strains belonged to clade 2.3.4.4b, with 13 related to H5N1, 19 to H5N6, and 9 to H5N8. Analysis based on global 2.3.4.4b viruses showed that all the viruses described in this study were likely originated from H5N8, exhibiting a heterogeneous evolutionary history between H5N1 and H5N6 during 2015-2022 worldwide. H5N1 showed a higher rate of evolution in 2021-2022 and more sites under positive selection pressure in 2015-2022. The antigenic profiles of the novel H5N1 and H5N6 exhibited notable variations. Further hemagglutination inhibition assay suggested that some A(H5N1) viruses may be antigenically distinct from the circulating H5N6 and H5N8 strains. Mammalian challenge assays demonstrated that the H5N8 virus (21GD001_H5N8) displayed the highest pathogenicity in mice, followed by the H5N1 virus (B1557_H5N1) and then the H5N6 virus (220086_H5N6), suggesting a heterogeneous virulence profile of H5 AIVs in the mammalian hosts. Based on the above results, we speculate that A(H5N1) viruses have a higher risk of emergence in the future. Collectively, these findings unveil a new landscape of different evolutionary history and biological characteristics of novel H5 AIVs in clade 2.3.4.4b, contributing to a better understanding of designing more effective strategies for the prevention and control of novel H5 AIVs.
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MESH Headings
- Animals
- China/epidemiology
- Phylogeny
- Influenza in Birds/virology
- Influenza in Birds/epidemiology
- Evolution, Molecular
- Mice
- Influenza A Virus, H5N1 Subtype/genetics
- Influenza A Virus, H5N1 Subtype/pathogenicity
- Influenza A Virus, H5N1 Subtype/classification
- Influenza A Virus, H5N1 Subtype/isolation & purification
- Influenza A Virus, H5N8 Subtype/genetics
- Influenza A Virus, H5N8 Subtype/pathogenicity
- Influenza A Virus, H5N8 Subtype/classification
- Influenza A Virus, H5N8 Subtype/isolation & purification
- Virulence
- Influenza A virus/genetics
- Influenza A virus/pathogenicity
- Influenza A virus/classification
- Chickens/virology
- Mice, Inbred BALB C
- Female
- Birds/virology
- Humans
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Affiliation(s)
- Siru Lin
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Junhong Chen
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Ke Li
- Institute of Poultry Management and Diseases, Yunnan Animal Science and Veterinary Institute, Kunming, 650000, China
| | - Yang Liu
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Siyuan Fu
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Shumin Xie
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Aimin Zha
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Aiguo Xin
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Xinyu Han
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Yuting Shi
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Lingyu Xu
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China
| | - Ming Liao
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China; Key Laboratory of Zoonoses, Key Laboratory of Animal Vaccine Development, Ministry of Agriculture, Guangzhou, 510642, China.
| | - Weixin Jia
- National Avian Influenza Para-Reference Laboratory, Guangdong Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Laboratory for Lingnan Modern Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China; Key Laboratory of Zoonoses, Key Laboratory of Animal Vaccine Development, Ministry of Agriculture, Guangzhou, 510642, China.
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2
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Bliss CM, Nachbagauer R, Mariottini C, Cuevas F, Feser J, Naficy A, Bernstein DI, Guptill J, Walter EB, Berlanda-Scorza F, Innis BL, García-Sastre A, Palese P, Krammer F, Coughlan L. A chimeric haemagglutinin-based universal influenza virus vaccine boosts human cellular immune responses directed towards the conserved haemagglutinin stalk domain and the viral nucleoprotein. EBioMedicine 2024; 104:105153. [PMID: 38805853 PMCID: PMC11154122 DOI: 10.1016/j.ebiom.2024.105153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 04/19/2024] [Accepted: 04/25/2024] [Indexed: 05/30/2024] Open
Abstract
BACKGROUND The development of a universal influenza virus vaccine, to protect against both seasonal and pandemic influenza A viruses, is a long-standing public health goal. The conserved stalk domain of haemagglutinin (HA) is a promising vaccine target. However, the stalk is immunosubdominant. As such, innovative approaches are required to elicit robust immunity against this domain. In a previously reported observer-blind, randomised placebo-controlled phase I trial (NCT03300050), immunisation regimens using chimeric HA (cHA)-based immunogens formulated as inactivated influenza vaccines (IIV) -/+ AS03 adjuvant, or live attenuated influenza vaccines (LAIV), elicited durable HA stalk-specific antibodies with broad reactivity. In this study, we sought to determine if these vaccines could also boost T cell responses against HA stalk, and nucleoprotein (NP). METHODS We measured interferon-γ (IFN-γ) responses by Enzyme-Linked ImmunoSpot (ELISpot) assay at baseline, seven days post-prime, pre-boost and seven days post-boost following heterologous prime:boost regimens of LAIV and/or adjuvanted/unadjuvanted IIV-cHA vaccines. FINDINGS Our findings demonstrate that immunisation with adjuvanted cHA-based IIVs boost HA stalk-specific and NP-specific T cell responses in humans. To date, it has been unclear if HA stalk-specific T cells can be boosted in humans by HA-stalk focused universal vaccines. Therefore, our study will provide valuable insights for the design of future studies to determine the precise role of HA stalk-specific T cells in broad protection. INTERPRETATION Considering that cHA-based vaccines also elicit stalk-specific antibodies, these data support the further clinical advancement of cHA-based universal influenza vaccine candidates. FUNDING This study was funded in part by the Bill and Melinda Gates Foundation (BMGF).
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Affiliation(s)
- Carly M Bliss
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Division of Cancer & Genetics and Systems Immunity University Research Institute, School of Medicine, Cardiff University, Cardiff, UK
| | - Raffael Nachbagauer
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Chiara Mariottini
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Frans Cuevas
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jodi Feser
- Center for Vaccine Innovation and Access, PATH, Seattle, WA, USA
| | - Abdi Naficy
- Center for Vaccine Innovation and Access, PATH, Seattle, WA, USA
| | - David I Bernstein
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA; Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Jeffrey Guptill
- Duke Early Phase Clinical Research Unit, Duke Clinical Research Institute, Durham, NC, USA
| | - Emmanuel B Walter
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, NC, USA
| | | | - Bruce L Innis
- Center for Vaccine Innovation and Access, PATH, Seattle, WA, USA
| | - Adolfo García-Sastre
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA; The Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA; The Icahn Genomics Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Peter Palese
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Florian Krammer
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Center for Vaccine Research and Pandemic Preparedness (C-VaRPP), Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Lynda Coughlan
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; University of Maryland School of Medicine, Department of Microbiology and Immunology, Baltimore, MD 21201, USA; University of Maryland School of Medicine, Center for Vaccine Development and Global Health (CVD), Baltimore, MD 21201, USA.
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3
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Sandhu S, Ferrante C, MacCosham A, Atchessi N, Bancej C. Epidemiological characteristics of human infections with avian influenza A(H5N6) virus, China and Laos: A multiple case descriptive analysis, February 2014-June 2023. CANADA COMMUNICABLE DISEASE REPORT = RELEVE DES MALADIES TRANSMISSIBLES AU CANADA 2024; 50:77-85. [PMID: 38655247 PMCID: PMC11037882 DOI: 10.14745/ccdr.v50i12a09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Background The first human infection with highly pathogenic avian influenza A(H5N6) virus was reported in 2014. From then until June 30, 2023, 85 human cases with confirmed A(H5N6) infection have been reported worldwide. Objective To address the present gap in knowledge of the overall epidemiology of human A(H5N6) infections, the epidemiological characteristics of human infection with A(H5N6) in China from February 2014 to June 2023 are described. Methods Considering the severity of human infections with A(H5N6) virus (case fatality rate: 39%), the increased frequency of case reports from 2021 to present day, and lack of comprehensive epidemiologic analysis of all cases, we conducted a multiple-case descriptive analysis and a literature review to create an epidemiologic profile of reported human cases. Case data was obtained via a literature search and using official intelligence sources captured by the Public Health Agency of Canada's International Monitoring and Assessment Tool (IMAT), including Event Information Site posts from the World Health Organization. Results Most human A(H5N6) cases have been reported from China (China: 84; Laos: 1), with severe health outcomes, including hospitalization and death, reported among at-risk populations. The majority (84%) of cases reported contact with birds prior to illness onset. Cases were detected throughout the course of the year, with a slight decrease in illness incidence in the warmer months. Conclusion As A(H5N6) continues to circulate and cause severe illness, surveillance and prompt information sharing is important for creating and implementing effective public health measures to reduce the likelihood of additional human infections.
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Affiliation(s)
- Simran Sandhu
- Centre for Emerging and Respiratory Infections and Pandemic Preparedness, Public Health Agency of Canada, Ottawa, ON
| | - Christina Ferrante
- Centre for Emerging and Respiratory Infections and Pandemic Preparedness, Public Health Agency of Canada, Ottawa, ON
| | - Aaron MacCosham
- Centre for Emerging and Respiratory Infections and Pandemic Preparedness, Public Health Agency of Canada, Ottawa, ON
| | - Nicole Atchessi
- Centre for Emerging and Respiratory Infections and Pandemic Preparedness, Public Health Agency of Canada, Ottawa, ON
| | - Christina Bancej
- Centre for Emerging and Respiratory Infections and Pandemic Preparedness, Public Health Agency of Canada, Ottawa, ON
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4
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Kandeil A, Patton C, Jones JC, Jeevan T, Harrington WN, Trifkovic S, Seiler JP, Fabrizio T, Woodard K, Turner JC, Crumpton JC, Miller L, Rubrum A, DeBeauchamp J, Russell CJ, Govorkova EA, Vogel P, Kim-Torchetti M, Berhane Y, Stallknecht D, Poulson R, Kercher L, Webby RJ. Rapid evolution of A(H5N1) influenza viruses after intercontinental spread to North America. Nat Commun 2023; 14:3082. [PMID: 37248261 PMCID: PMC10227026 DOI: 10.1038/s41467-023-38415-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 04/27/2023] [Indexed: 05/31/2023] Open
Abstract
Highly pathogenic avian influenza A(H5N1) viruses of clade 2.3.4.4b underwent an explosive geographic expansion in 2021 among wild birds and domestic poultry across Asia, Europe, and Africa. By the end of 2021, 2.3.4.4b viruses were detected in North America, signifying further intercontinental spread. Here we show that the western movement of clade 2.3.4.4b was quickly followed by reassortment with viruses circulating in wild birds in North America, resulting in the acquisition of different combinations of ribonucleoprotein genes. These reassortant A(H5N1) viruses are genotypically and phenotypically diverse, with many causing severe disease with dramatic neurologic involvement in mammals. The proclivity of the current A(H5N1) 2.3.4.4b virus lineage to reassort and target the central nervous system warrants concerted planning to combat the spread and evolution of the virus within the continent and to mitigate the impact of a potential influenza pandemic that could originate from similar A(H5N1) reassortants.
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Affiliation(s)
- Ahmed Kandeil
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
- Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza, 12622, Egypt
| | - Christopher Patton
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
- Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, 38105, USA
| | - Jeremy C Jones
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Trushar Jeevan
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Walter N Harrington
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Sanja Trifkovic
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Jon P Seiler
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Thomas Fabrizio
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Karlie Woodard
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Jasmine C Turner
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Jeri-Carol Crumpton
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Lance Miller
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Adam Rubrum
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Jennifer DeBeauchamp
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Charles J Russell
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Elena A Govorkova
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Peter Vogel
- Comparative Pathology Core, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Mia Kim-Torchetti
- National Veterinary Services Laboratories, Animal and Plant Health Inspection Service (APHIS), US Department of Agriculture (USDA), Ames, IA, 50011, USA
| | - Yohannes Berhane
- National Centre for Foreign Animal Disease, Winnipeg, MB, R3E 3M4, Canada
- Department of Animal Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - David Stallknecht
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, The University of Georgia, Athens, GA, 30602, USA
| | - Rebecca Poulson
- Southeastern Cooperative Wildlife Disease Study, Department of Population Health, College of Veterinary Medicine, The University of Georgia, Athens, GA, 30602, USA
| | - Lisa Kercher
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
| | - Richard J Webby
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA.
- Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, 38105, USA.
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5
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Gu W, Shi J, Cui P, Yan C, Zhang Y, Wang C, Zhang Y, Xing X, Zeng X, Liu L, Tian G, Suzuki Y, Li C, Deng G, Chen H. Novel H5N6 reassortants bearing the clade 2.3.4.4b HA gene of H5N8 virus have been detected in poultry and caused multiple human infections in China. Emerg Microbes Infect 2022; 11:1174-1185. [PMID: 35380505 PMCID: PMC9126593 DOI: 10.1080/22221751.2022.2063076] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The globally circulating H5N8 avian influenza viruses bearing the clade 2.3.4.4b hemagglutinin (HA) gene are responsible for the loss of more than 33 million domestic poultry since January 2020. Moreover, the H5N8 viruses have reassorted with other avian influenza viruses and formed H5N1, H5N2, H5N3, H5N4, and H5N5 viruses in Europe, Africa, and North America. In this study, we analyzed 15 H5N6 viruses isolated from poultry and seven H5N6 viruses isolated from humans, and found these viruses formed seven different genotypes by deriving the clade 2.3.4.4b HA gene of H5N8 viruses, the neuraminidase of domestic duck H5N6 viruses, and internal genes of different viruses that previously circulated in domestic ducks and wild birds in China. Two of these genotypes (genotype 3 and genotype 6) have caused human infections in multiple provinces. The H5N6 viruses isolated from poultry have distinct pathotypes in mice; some of them replicate systemically and are highly lethal in mice. Although these viruses exclusively bind to avian-type receptors, it is worrisome that they may obtain key mutations that would increase their affinity for human-type receptors during replication in humans. Our study indicates that the novel H5N6 reassortants bearing the clade 2.3.4.4b HA gene of H5N8 viruses were generated through reassortment in domestic ducks and may have spread across a wide area of China, thereby posing a new challenge to the poultry industry and human health. Our findings emphasize the importance of careful monitoring, evaluation, and control of the H5N6 viruses circulating in nature.
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Affiliation(s)
- Wenli Gu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Jianzhong Shi
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Pengfei Cui
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Cheng Yan
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Yaping Zhang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Congcong Wang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Yuancheng Zhang
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Xin Xing
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Xianying Zeng
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Liling Liu
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Guobin Tian
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Yasuo Suzuki
- Department of Medical Biochemistry, University of Shizuoka School of Pharmaceutical Sciences, Shizuoka, Japan
| | - Chengjun Li
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, People's Republic of China
| | - Guohua Deng
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China
| | - Hualan Chen
- State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People's Republic of China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, People's Republic of China
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6
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Duong BT, Than DD, Ankhanbaatar U, Gombo-Ochir D, Shura G, Tsolmon A, Pun Mok CK, Basan G, Yeo SJ, Park H. Assessing potential pathogenicity of novel highly pathogenic avian influenza (H5N6) viruses isolated from Mongolian wild duck feces using a mouse model. Emerg Microbes Infect 2022; 11:1425-1434. [PMID: 35451353 PMCID: PMC9154755 DOI: 10.1080/22221751.2022.2069515] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Several novel highly pathogenic avian influenza (HPAIVs) A(H5N6) viruses were reported in Mongolia in 2020, some of which included host-specific markers associated with mammalian infection. However, their pathogenicity has not yet been investigated. Here, we isolated and evaluate two novel genotypes of A(H5N6) subtype in Mongolia during 2018–2019 (A/wildDuck/MN/H5N6/2018-19). Their evolution pattern and molecular characteristics were evaluated using gene sequencing and their pathogenicity was determined using a mouse model. We also compared their antigenicity with previous H5 Clade 2.3.4.4 human isolates by cross-hemagglutination inhibition (HI). Our data suggests that A/wildDuck/MN/H5N6/2018-19 belongs to clade 2.3.4.4h, and maintains several residues associated with mammal adaptation. In addition, our evaluations revealed that their isolates are less virulent in mice than the previously identified H5 human isolates. However, their antigenicity is distinct from other HPAIVs H5 clade 2.3.4.4, thus supporting their continued evaluation as potential infection risks and the preparation of novel candidate vaccines for their neutralization.
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Affiliation(s)
- Bao Tuan Duong
- Zoonosis Research Center, Department of Infection Biology, School of Medicine, Wonkwang University, Iksan, Korea
| | - Duc Duong Than
- Zoonosis Research Center, Department of Infection Biology, School of Medicine, Wonkwang University, Iksan, Korea
| | | | | | - Gansukh Shura
- State Central Veterinary Laboratory, Zaisan, Ulaanbaatar, Mongolia
| | | | - Chris Ka Pun Mok
- HKU-Pasteur Research Pole, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - Ganzorig Basan
- State Central Veterinary Laboratory, Zaisan, Ulaanbaatar, Mongolia
| | - Seon Ju Yeo
- Department of Tropical Medicine and Parasitology, Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - Hyun Park
- Zoonosis Research Center, Department of Infection Biology, School of Medicine, Wonkwang University, Iksan, Korea
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7
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Zhang C, Cui H, Zhang C, Zhao K, Kong Y, Chen L, Dong S, Chen Z, Pu J, Zhang L, Guo Z, Liu J. Pathogenicity and Transmissibility of Clade 2.3.4.4h H5N6 Avian Influenza Viruses in Mammals. Animals (Basel) 2022; 12:ani12223079. [PMID: 36428307 PMCID: PMC9686590 DOI: 10.3390/ani12223079] [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: 08/26/2022] [Revised: 11/02/2022] [Accepted: 11/08/2022] [Indexed: 11/10/2022] Open
Abstract
Avian influenza viruses (AIVs) have the potential for cross-species transmission and pandemics. In recent years, clade 2.3.4.4 H5N6 AIVs are prevalent in domestic poultry, posing a threat to the domestic poultry industry and public health. In this study, two strains of H5N6 AIVs were isolated from chickens in Hebei, China, in 2019: A/chicken/Hebei/HB1907/2019(H5N6) and A/chicken/Hebei/HB1905/2019(H5N6). Phylogenetic analysis showed that both viral HA genes clustered in the 2.3.4.4h clade. Receptor binding analysis showed that the HB1905 strain preferentially binds to α-2,3-linked sialic acid (SA) receptors, while the HB1907 strain preferentially binds to α-2,3- and α-2,6-linked sialic acid (SA) receptors. During early infection, the HB1907 strain is highly replicable in MDCK cells, more so than the HB1905 strain. Pathogenicity assays in mice showed that both viruses could replicate in the lungs without prior adaptation, with HB1907 being more highly pathogenic in mice than the HB1905 strain. Significantly, both the HB1905 and HB1907 strains can be transmitted through direct contact among guinea pigs, but the transmission efficiency of the HB1907 strain through contact between guinea pigs is much greater than that of the HB1905 strain. These results strengthen the need for ongoing surveillance and early warning of H5N6 AIVs in poultry.
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Affiliation(s)
- Cheng Zhang
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
- Changchun Veterinary Research Institute, Chinese Academy of Agriculture Sciences, Changchun 130122, China
| | - Huan Cui
- Changchun Veterinary Research Institute, Chinese Academy of Agriculture Sciences, Changchun 130122, China
- College of Animal Medicine, Jilin University, Changchun 130062, China
| | - Chunmao Zhang
- Changchun Veterinary Research Institute, Chinese Academy of Agriculture Sciences, Changchun 130122, China
| | - Kui Zhao
- College of Animal Medicine, Jilin University, Changchun 130062, China
| | - Yunyi Kong
- Changchun Veterinary Research Institute, Chinese Academy of Agriculture Sciences, Changchun 130122, China
| | - Ligong Chen
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
| | - Shishan Dong
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
| | - Zhaoliang Chen
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
| | - Jie Pu
- Changchun Veterinary Research Institute, Chinese Academy of Agriculture Sciences, Changchun 130122, China
| | - Lei Zhang
- Changchun Veterinary Research Institute, Chinese Academy of Agriculture Sciences, Changchun 130122, China
| | - Zhendong Guo
- Changchun Veterinary Research Institute, Chinese Academy of Agriculture Sciences, Changchun 130122, China
- Correspondence: (Z.G.); (J.L.)
| | - Juxiang Liu
- College of Veterinary Medicine, Hebei Agricultural University, Baoding 071000, China
- Correspondence: (Z.G.); (J.L.)
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Chen J, Xu L, Liu T, Xie S, Li K, Li X, Zhang M, Wu Y, Wang X, Wang J, Shi K, Niu B, Liao M, Jia W. Novel Reassortant Avian Influenza A(H5N6) Virus, China, 2021. Emerg Infect Dis 2022; 28:1703-1707. [PMID: 35820171 PMCID: PMC9328904 DOI: 10.3201/eid2808.212241] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Although reports of human infection with influenza A(H5N6) increased in 2021, reports of similar H5N6 virus infection in poultry are few. We detected 10 avian influenza A(H5N6) clade 2.3.4.4b viruses in poultry from 4 provinces in China. The viruses showed strong immune-escape capacity and complex genetic reassortment, suggesting further transmission risk.
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9
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Ye H, Zhang J, Sang Y, Shan N, Qiu W, Zhong W, Li J, Yuan Z. Divergent Reassortment and Transmission Dynamics of Highly Pathogenic Avian Influenza A(H5N8) Virus in Birds of China During 2021. Front Microbiol 2022; 13:913551. [PMID: 35847056 PMCID: PMC9279683 DOI: 10.3389/fmicb.2022.913551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 05/16/2022] [Indexed: 11/13/2022] Open
Abstract
Highly pathogenic influenza A(H5N8) viruses had caused several outbreaks among wild bird and poultry populations across the globe, and strikingly, caused human infection, posing serious public health concerns. In this study, we conducted influenza surveillance in China during 2021 to monitor the evolution of influenza viruses in poultry. A total of 35 influenza viruses were obtained in chickens, ducks, and geese, of which 30 H5N8 viruses, 3 H5N1 viruses, and 2 H5N6 viruses. Phylogenetic analysis suggested all of H5N1, H5N6, and H5N8 isolates were derived from clade 2.3.4.4b H5N8 viruses during 2020/21 season, and notably, the internal genes of H5N1 and H5N6 viruses shared different genetic heterogeneity with H5N8 viruses and had been reassorted with wild bird-origin H5N1 viruses from Europe. By contrast, almost all H5N8 viruses exhibited only one phylogenic cluster with wild bird-origin H5N8 viruses in China and Korea, indicating that H5N8 viruses in China were more stable. Besides, we found that Korea is the main output geographic location in the spread of these H5N8 viruses to northern and eastern China, and especially, the co-circulation of H5N8 viruses occurred within China, with central China acted as a seeding population during the H5N8 epidemic. The statistical support was strong for viral migration from wild birds to chickens and ducks, indicating that 2.3.4.4b poultry-origin H5N8 viruses during 2020–2021 were originated from wild birds. Our findings provide novel insights into evolution and transmission dynamics of H5 subtype influenza viruses among poultry after novel H5N8 viruses invaded China for nearly one year.
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Affiliation(s)
- Hejia Ye
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- Guangzhou South China Biological Medicine, Co., Ltd, Guangzhou, China
| | - Jiahao Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Avian Influenza Para-Reference Laboratory, Guangzhou, China
- Key Laboratory of Zoonoses, Ministry of Agriculture and Rural Affairs of the People’s Republic of China, Guangzhou, China
| | - Yunfen Sang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
- National Avian Influenza Para-Reference Laboratory, Guangzhou, China
- Key Laboratory of Zoonoses, Ministry of Agriculture and Rural Affairs of the People’s Republic of China, Guangzhou, China
| | - Nan Shan
- Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment of the People’s Republic of China, Nanjing, China
| | - Weihong Qiu
- Guangzhou South China Biological Medicine, Co., Ltd, Guangzhou, China
| | - Wenting Zhong
- Guangzhou South China Biological Medicine, Co., Ltd, Guangzhou, China
| | - Junbao Li
- Guangzhou South China Biological Medicine, Co., Ltd, Guangzhou, China
| | - Zhaoxia Yuan
- College of Animal Science and Technology, Zhongkai University of Agriculture and Engineering, Guangzhou, China
- Guangdong Province Key Laboratory of Waterfowl Healthy Breeding, Guangzhou, China
- *Correspondence: Zhaoxia Yuan,
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Development of a Rapid Fluorescent Diagnostic System for Early Detection of the Highly Pathogenic Avian Influenza H5 Clade 2.3.4.4 Viruses in Chicken Stool. Int J Mol Sci 2022; 23:ijms23116301. [PMID: 35682982 PMCID: PMC9181406 DOI: 10.3390/ijms23116301] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/01/2022] [Accepted: 06/01/2022] [Indexed: 01/27/2023] Open
Abstract
Rapid diagnosis is essential for the control and prevention of H5 highly pathogenic avian influenza viruses (HPAIVs). However, highly sensitive and rapid diagnostic systems have shown limited performance due to specific antibody scarcity. In this study, two novel specific monoclonal antibodies (mAbs) for clade 2.3.4.4 H5Nx viruses were developed by using an immunogen from a reversed genetic influenza virus (RGV). These mAbs were combined with fluorescence europium nanoparticles and an optimized lysis buffer, which were further used for developing a fluorescent immunochromatographic rapid strip test (FICT) for early detection of H5Nx influenza viruses on chicken stool samples. The result indicates that the limit of detection (LoD) of the developed FICT was 40 HAU/mL for detection of HPAIV H5 clade 2.3.4.4b in spiked chicken stool samples, which corresponded to 4.78 × 104 RNA copies as obtained from real-time polymerase chain reaction (RT-PCR). An experimental challenge of chicken with H5N6 HPAIV is lethal for chicken three days post-infection (DPI). Interestingly, our FICT could detect H5N6 in stool samples at 2 DPI earlier, with 100% relative sensitivity in comparison with RT-PCR, and it showed 50% higher sensitivity than the traditional colloidal gold-based rapid diagnostic test using the same mAbs pair. In conclusion, our rapid diagnostic method can be utilized for the early detection of H5Nx 2.3.4.4 HPAIVs in avian fecal samples from poultry farms or for influenza surveillance in wild migratory birds.
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Emergence, Evolution, and Biological Characteristics of H10N4 and H10N8 Avian Influenza Viruses in Migratory Wild Birds Detected in Eastern China in 2020. Microbiol Spectr 2022; 10:e0080722. [PMID: 35389243 PMCID: PMC9045299 DOI: 10.1128/spectrum.00807-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
H10Nx influenza viruses have caused increasing public concern due to their occasional infection of humans. However, the genesis and biological characteristics of H10 viruses in migratory wild birds are largely unknown. In this study, we conducted active surveillance to monitor circulation of avian influenza viruses in eastern China and isolated five H10N4 and two H10N8 viruses from migratory birds in 2020. Genetic analysis indicated that the hemagglutinin (HA) genes of the seven H10 viruses were clustered into the North American lineage and established as a novel Eurasian branch in wild birds in South Korea, Bangladesh, and China. The neuraminidase (NA) genes of the H10N4 and H10N8 viruses originated from the circulating HxN4 and H5N8 viruses in migratory birds in Eurasia. We further revealed that some of the novel H10N4 and H10N8 viruses acquired the ability to bind human-like receptors. Animal studies indicated that these H10 viruses can replicate in mice, chickens, and ducks. Importantly, we found that the H10N4 and H10N8 viruses can transmit efficiently among chickens and ducks but induce lower HA inhibition (HI) antibody titers in ducks. These findings emphasized that annual surveillance in migratory waterfowl should be strengthened to monitor the introduction of wild-bird H10N4 and H10N8 reassortants into poultry. IMPORTANCE The emerging avian influenza reassortants and mutants in birds pose an increasing threat to poultry and public health. H10 avian influenza viruses are widely prevalent in wild birds, poultry, seals, and minks and pose an increasing threat to human health. The occasional human infections with H10N8 and H10N3 viruses in China have significantly increased public concern about the potential pandemic risk posed by H10 viruses. In this study, we found that the North American H10 viruses have been successfully introduced to Asia by migratory birds and further reassorted with other subtypes to generate novel H10N4 and H10N8 viruses in eastern China. These emerging H10 reassortants have a high potential to threaten the poultry industry and human health due to their efficient replication and transmission in chickens, ducks, and mice.
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12
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Su K, Yu Z, Lan Y, Wang J, Chen S, Qi L, Chen Y, Tang Y, Xiong Y, Tan Z, Wang M, Ye S, Wang D, Ling H, Liu WJ, Zhong X, Li Q, Tang W. Three Cases Infected with Avian Influenza A(H5N6) Virus — Chongqing Municipality, China, January–September, 2021. China CDC Wkly 2022; 4:11-16. [PMID: 35586756 PMCID: PMC8796724 DOI: 10.46234/ccdcw2021.278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 12/08/2021] [Indexed: 11/17/2022] Open
Abstract
What is already known about this topic? The World Health Organization (WHO) has reported a total of 48 cases by October 15, 2021. The continuous genomic reassortments of H5N6 and other subtype avian influenza viruses (AIVs) pose a long-term threat to public health and the poultry industry. What is added by this report? Three new cases of H5N6 that occurred from January to September 2021 in Chongqing Municipality, China were reported in this study. Epidemiological information of the three cases showed raising poultry and visiting live poultry market contributed to these infections, and there was no evidence of human-to-human transmission of H5N6 currently but a potential spatial cluster. An increase of H5N6 cases was recorded in the area. What are the implications for public health practice? In case of unexplained pneumonia or severe respiratory infection, the patients’ epidemiological history of contact with poultry or live poultry markets (LPMs) may be an important interrogation to help diagnose. Extensive and long-term surveillance of avian influenza viruses in LPMs is essential.
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Affiliation(s)
- Kun Su
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
- College of Public Health and Management, Chongqing Medical University, Chongqing, China
- Chongqing Public Health Medical Center, Chongqing, China
| | - Zhen Yu
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
- Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing, China
| | - Yu Lan
- NHC Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Ju Wang
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
| | - Shuang Chen
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
- Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing, China
| | - Li Qi
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
| | - Yaokai Chen
- Chongqing Public Health Medical Center, Chongqing, China
| | - Yun Tang
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
- Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing, China
| | - Yu Xiong
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
| | - Zhangping Tan
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
- Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing, China
| | - Mingyue Wang
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
- Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing, China
| | - Sheng Ye
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
- Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing, China
| | - Dayan Wang
- NHC Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Hua Ling
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
- Chongqing Municipal Key Laboratory for High Pathogenic Microbes, Chongqing, China
| | - William J. Liu
- NHC Key Laboratory of Biosafety, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xiaoni Zhong
- College of Public Health and Management, Chongqing Medical University, Chongqing, China
- Xiaoni Zhong,
| | - Qin Li
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
- Qin Li,
| | - Wenge Tang
- Chongqing Municipal Center for Disease Control and Prevention, Chongqing, China
- Wenge Tang,
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Liu WJ, Liu S. A Tale of Two Cities: From Influenza HxNy to SARS-CoV-z. China CDC Wkly 2021; 3:1052-1056. [PMID: 34934515 PMCID: PMC8668405 DOI: 10.46234/ccdcw2021.256] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 11/30/2021] [Indexed: 11/14/2022] Open
Affiliation(s)
- William J Liu
- Chinese National Influenza Center (CNIC), National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Shelan Liu
- Department of Infectious Diseases, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou, Zhejiang, China.,Key Laboratory of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Hangzhou, Zhejiang, China
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14
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Gao GF, Liu WJ. Let's Get Vaccinated for Both Flu and COVID-19: On the World Flu Day 2021. China CDC Wkly 2021; 3:915-917. [PMID: 34745691 PMCID: PMC8563337 DOI: 10.46234/ccdcw2021.227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 10/29/2021] [Indexed: 02/06/2023] Open
Affiliation(s)
- George F. Gao
- Chinese Center for Disease Control and Prevention, Beijing, China
| | - William J. Liu
- Chinese Center for Disease Control and Prevention, Beijing, China
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15
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Bi F, Jiang L, Huang L, Wei J, Pan X, Ju Y, Mo J, Chen M, Kang N, Tan Y, Li Y, Wang J. Genetic Characterization of Two Human Cases Infected with the Avian Influenza A (H5N6) Viruses - Guangxi Zhuang Autonomous Region, China, 2021. China CDC Wkly 2021; 3:923-928. [PMID: 34745693 PMCID: PMC8563334 DOI: 10.46234/ccdcw2021.199] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 09/02/2021] [Indexed: 11/14/2022] Open
Abstract
What is known about this topic? H5N6 has replaced H5N1 as a dominant avian influenza virus (AIV) subtype in southern China. The increasing genetic diversity and geographical distribution of H5N6 pose a serious threat to the poultry industry and human health. What is added by this report? A total of 2 cases of H5N6 that occurred from February 2021 to July 2021 in Guangxi, China were reported in this study. Phylogenetic analysis of gene was constructed, and some mutations of HA gene, PB2 gene, PA gene, M1 gene, NS1 gene, the receptor-binding site were detected. The evolutionary origins of the internal genes were different. What are the implications for public health practice? As a multi-source reassortant virus, the H5N6 highly pathogenic AIV is continuously evolving. There is an urgent need to strengthen the surveillance of drug-resistant strains and novel variants.
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Affiliation(s)
- Fuyin Bi
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Center for Disease Control and Prevention, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Lili Jiang
- Guilin Center for Disease Control and Prevention, Guilin, Guangxi Zhuang Autonomous Region, China
| | - Lihua Huang
- Hechi Center for Disease Control and Prevention, Hechi, Guangxi Zhuang Autonomous Region, China
| | - Jingguang Wei
- Hechi Center for Disease Control and Prevention, Hechi, Guangxi Zhuang Autonomous Region, China
| | - Xiaowen Pan
- Guilin Center for Disease Control and Prevention, Guilin, Guangxi Zhuang Autonomous Region, China
| | - Yu Ju
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Center for Disease Control and Prevention, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Jianjun Mo
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Center for Disease Control and Prevention, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Minmei Chen
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Center for Disease Control and Prevention, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Ning Kang
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Center for Disease Control and Prevention, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Yi Tan
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Center for Disease Control and Prevention, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Yonghong Li
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Center for Disease Control and Prevention, Nanning, Guangxi Zhuang Autonomous Region, China
| | - Jing Wang
- Guangxi Key Laboratory of Major Infectious Disease Prevention and Control and Biosafety Emergency Response, Guangxi Center for Disease Control and Prevention, Nanning, Guangxi Zhuang Autonomous Region, China
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