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Sun Y, Zhu Y, Zhang P, Sheng S, Guan Z, Cong Y. Hemagglutinin glycosylation pattern-specific effects: implications for the fitness of H9.4.2.5-branched H9N2 avian influenza viruses. Emerg Microbes Infect 2024; 13:2364736. [PMID: 38847071 PMCID: PMC11182062 DOI: 10.1080/22221751.2024.2364736] [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: 03/27/2024] [Accepted: 06/02/2024] [Indexed: 06/16/2024]
Abstract
Since 2007, h9.4.2.5 has emerged as the most predominant branch of H9N2 avian influenza viruses (AIVs) that affects the majority of the global poultry population. The spread of this viral branch in vaccinated chicken flocks has not been considerably curbed despite numerous efforts. The evolutionary fitness of h9.4.2.5-branched AIVs must consequently be taken into consideration. The glycosylation modifications of hemagglutinin (HA) play a pivotal role in regulating the balance between receptor affinity and immune evasion for influenza viruses. Sequence alignment showed that five major HA glycosylation patterns have evolved over time in h9.4.2.5-branched AIVs. Here, we compared the adaptive phenotypes of five virus mutants with different HA glycosylation patterns. According to the results, the mutant with 6 N-linked glycans displayed the best acid and thermal stability and a better capacity for multiplication, although having a relatively lower receptor affinity than 7 glycans. The antigenic profile between the five mutants revealed a distinct antigenic distance, indicating that variations in glycosylation level have an impact on antigenic drift. These findings suggest that changes in the number of glycans on HA can not only modulate the receptor affinity and antigenicity of H9N2 AIVs, but also affect their stability and multiplication. These adaptive phenotypes may underlie the biological basis for the dominant strain switchover of h9.4.2.5-branched AIVs. Overall, our study provides a systematic insight into how changes in HA glycosylation patterns regulate the evolutionary fitness and epidemiological dominance drift of h9.4.2.5-branched H9N2 AIVs, which will be of great benefit for the glycosylation-dependent vaccine design.
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Affiliation(s)
- Yixue Sun
- Department of Policies and Regulations, Changchun University, Changchun, People’s Republic of China
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, and College of Veterinary Medicine, Jilin University, Changchun, China
| | - Yanting Zhu
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, and College of Veterinary Medicine, Jilin University, Changchun, China
| | - Pengju Zhang
- Institute of Animal Biotechnology, Jilin Academy of Agricultural Sciences, Changchun, People’s Republic of China
| | - Shouzhi Sheng
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, and College of Veterinary Medicine, Jilin University, Changchun, China
| | - Zhenhong Guan
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, and College of Veterinary Medicine, Jilin University, Changchun, China
| | - Yanlong Cong
- State Key Laboratory for Diagnosis and Treatment of Severe Zoonotic Infectious Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, and College of Veterinary Medicine, Jilin University, Changchun, China
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Fusaro A, Pu J, Zhou Y, Lu L, Tassoni L, Lan Y, Lam TTY, Song Z, Bahl J, Chen J, Gao GF, Monne I, Liu J. Proposal for a Global Classification and Nomenclature System for A/H9 Influenza Viruses. Emerg Infect Dis 2024; 30:1-13. [PMID: 39043566 PMCID: PMC11286050 DOI: 10.3201/eid3008.231176] [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] [Indexed: 07/25/2024] Open
Abstract
Influenza A/H9 viruses circulate worldwide in wild and domestic avian species, continuing to evolve and posing a zoonotic risk. A substantial increase in human infections with A/H9N2 subtype avian influenza viruses (AIVs) and the emergence of novel reassortants carrying A/H9N2-origin internal genes has occurred in recent years. Different names have been used to describe the circulating and emerging A/H9 lineages. To address this issue, an international group of experts from animal and public health laboratories, endorsed by the WOAH/FAO Network of Expertise on Animal Influenza, has created a practical lineage classification and nomenclature system based on the analysis of 10,638 hemagglutinin sequences from A/H9 AIVs sampled worldwide. This system incorporates phylogenetic relationships and epidemiologic characteristics designed to trace emerging and circulating lineages and clades. To aid in lineage and clade assignment, an online tool has been created. This proposed classification enables rapid comprehension of the global spread and evolution of A/H9 AIVs.
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Yang Q, Ji J, Yang J, Zhang Y, Yin H, Dai H, Wang W, Li S. Diversity of genotypes and pathogenicity of H9N2 avian influenza virus derived from wild bird and domestic poultry. Front Microbiol 2024; 15:1402235. [PMID: 38974026 PMCID: PMC11225357 DOI: 10.3389/fmicb.2024.1402235] [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: 03/17/2024] [Accepted: 06/03/2024] [Indexed: 07/09/2024] Open
Abstract
Introduction The H9N2 subtype is a predominant avian influenza virus (AIV) circulating in Chinese poultry, forming various genotypes (A-W) based on gene segment origins. This study aims to investigate the genotypic distribution and pathogenic characteristics of H9N2 isolates from wild birds and domestic poultry in Yunnan Province, China. Methods Eleven H9N2 strains were isolated from fecal samples of overwintering wild birds and proximate domestic poultry in Yunnan, including four from common cranes (Grus grus), two from bar-headed geese (Anser indicus), and five from domestic poultry (Gallus gallus). Phylogenetic analysis was conducted to determine the genotypes, and representative strains were inoculated into Yunnan mallard ducks to assess pathogenicity. Results Phylogenetic analysis revealed that five isolates from domestic birds and one from a bar-headed goose belong to genotype S, while the remaining five isolates from wild birds belong to genotype A. These bird-derived strains possess deletions in the stalk domain of NA protein and the N166D mutation of HA protein, typical of poultry strains. Genotype S H9N2 demonstrated oropharyngeal shedding, while genotype A H9N2 exhibited cloacal shedding and high viral loads in the duodenum. Both strains caused significant pathological injuries, with genotype S inducing more severe damage to the thymus and spleen, while genotype A caused duodenal muscle layer rupture. Discussion These findings suggest that at least two genotypes of H9N2 are currently circulating in Yunnan, and Yunnan mallard ducks potentially act as intermediaries in interspecies transmission. These insights highlight the importance of analyzing the current epidemiological transmission characteristics of H9N2 among wild and domestic birds in China.
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Affiliation(s)
- Qinhong Yang
- College of Life Sciences, Southwest Forestry University, Kunming, China
| | - Jia Ji
- College of Life Sciences, Southwest Forestry University, Kunming, China
| | - Jia Yang
- College of Life Sciences, Southwest Forestry University, Kunming, China
| | - Yongxian Zhang
- Animal Disease Inspection and Supervision Institution of Yunnan Province, Kunming, China
| | - Hongbin Yin
- Animal Disease Inspection and Supervision Institution of Yunnan Province, Kunming, China
| | - Hongyang Dai
- The Management Bureau of Huize Black Necked Crane National Nature Reserve, Qujing, China
| | - Wei Wang
- College of Life Sciences, Southwest Forestry University, Kunming, China
| | - Suhua Li
- College of Life Sciences, Southwest Forestry University, Kunming, China
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Zhang N, Quan K, Chen Z, Hu Q, Nie M, Xu N, Gao R, Wang X, Qin T, Chen S, Peng D, Liu X. The emergence of new antigen branches of H9N2 avian influenza virus in China due to antigenic drift on hemagglutinin through antibody escape at immunodominant sites. Emerg Microbes Infect 2023; 12:2246582. [PMID: 37550992 PMCID: PMC10444018 DOI: 10.1080/22221751.2023.2246582] [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: 04/11/2023] [Revised: 07/13/2023] [Accepted: 08/06/2023] [Indexed: 08/09/2023]
Abstract
Vaccination is a crucial prevention and control measure against H9N2 avian influenza viruses (AIVs) that threaten poultry production and public health. However, H9N2 AIVs in China undergo continuous antigenic drift of hemagglutinin (HA) under antibody pressure, leading to the emergence of immune escape variants. In this study, we investigated the molecular basis of the current widespread antigenic drift of H9N2 AIVs. Specifically, the most prevalent h9.4.2.5-lineage in China was divided into two antigenic branches based on monoclonal antibody (mAb) hemagglutination inhibition (HI) profiling analysis, and 12 antibody escape residues were identified as molecular markers of these two branches. The 12 escape residues were mapped to antigenic sites A, B, and E (H3 was used as the reference). Among these, eight residues primarily increased 3`SLN preference and contributed to antigenicity drift, and four of the eight residues at sites A and B were positively selected. Moreover, the analysis of H9N2 strains over time and space has revealed the emergence of a new antigenic branch in China since 2015, which has replaced the previous branch. However, the old antigenic branch recirculated to several regions after 2018. Collectively, this study provides a theoretical basis for understanding the molecular mechanisms of antigenic drift and for developing vaccine candidates that contest with the current antigenicity of H9N2 AIVs.
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Affiliation(s)
- Nan Zhang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
| | - Keji Quan
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
| | - Zixuan Chen
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
| | - Qun Hu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
| | - Maoshun Nie
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
| | - Nuo Xu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
| | - Ruyi Gao
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
| | - Xiaoquan Wang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
| | - Tao Qin
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
| | - Sujuan Chen
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
| | - Daxin Peng
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, People’s Republic of China
- The International Joint Laboratory for Cooperation in Agriculture and Agricultural Product Safety, Ministry of Education, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou, People’s Republic of China
| | - Xiufan Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, People’s Republic of China
- Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou University, Yangzhou, People’s Republic of China
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Yang J, Yan J, Zhang C, Li S, Yuan M, Zhang C, Shen C, Yang Y, Fu L, Xu G, Shi W, Ma Z, Luo TR, Bi Y. Genetic, biological and epidemiological study on a cluster of H9N2 avian influenza virus infections among chickens, a pet cat, and humans at a backyard farm in Guangxi, China. Emerg Microbes Infect 2023; 12:2143282. [PMID: 36328956 PMCID: PMC9769140 DOI: 10.1080/22221751.2022.2143282] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
During an investigation in October 2018, two people with diarrhoea, mild abdominal pain, and mild arthralgia symptoms in Guangxi, China, were identified as infected by H9N2 avian influenza virus (AIV). Four H9N2 AIVs were isolated from one of two patients, a pet cat, and a dead chicken (two respective isolates from its lung and kidney tissues) bred by the patients at a backyard farm. Epidemiological investigation indicated that the newly bought chicken died first, and clinical syndromes appeared subsequently in the two owners and one cat. Furthermore, the two individuals possessed high H9N2-specific hemagglutination inhibition and microneutralization antibodies. Shared nucleotide sequence identity (99.9% - 100%) for all genes was detected in the four H9N2 isolates, and hemagglutinin (HA) T138A located on the receptor binding domain (RBD), resulted from nucleotide polymorphisms that were exclusively found in the isolate from the female patient. Moreover, HA K137N on the RBD was found in isolates from these three host species. Importantly, these four H9N2 isolates presented an exclusive binding preference for the human-type receptor (α2-6-SA), and could replicate and cause pathological changes in mice. Phylogenetic analyses showed that these four isolates clustered together and belonged to clade C1.2, lineage Y280. In addition, H9N2 viruses of human origin are genetically divergent and interspersed with the widespread poultry-origin H9N2 AIVs. All these results indicate a high risk of H9N2 AIVs in public health, and effective prevention and control measures against H9N2 AIVs should be considered and performed for both animal and human health.
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Affiliation(s)
- Jing Yang
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Jianhua Yan
- Laboratory of Animal Infectious Diseases, Medical College & College of Animal Sciences and Veterinary Medicine, Guangxi University, Nanning, People’s Republic of China
| | - Cheng Zhang
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing, People’s Republic of China,College of Life Science and Technology, Xinjiang University, Urumchi, People’s Republic of China
| | - Shanqin Li
- Shenzhen Key Laboratory of Pathogen and Immunity, Guangdong Key Laboratory for Diagnosis and Treatment of Emerging Infectious Diseases, State Key Discipline of Infectious Disease, Second Hospital Affiliated to Southern University of Science and Technology, Shenzhen Third People’s Hospital, Shenzhen, People’s Republic of China
| | - Manhua Yuan
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Chunge Zhang
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Chenguang Shen
- School of Public Health, Southern Medical University, Guangzhou, People’s Republic of China
| | - Yang Yang
- Shenzhen Key Laboratory of Pathogen and Immunity, Guangdong Key Laboratory for Diagnosis and Treatment of Emerging Infectious Diseases, State Key Discipline of Infectious Disease, Second Hospital Affiliated to Southern University of Science and Technology, Shenzhen Third People’s Hospital, Shenzhen, People’s Republic of China
| | - Lifeng Fu
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing, People’s Republic of China
| | - Guanlong Xu
- China Institute of Veterinary Drug Control, Beijing, People’s Republic of China
| | - Weifeng Shi
- Key Laboratory of Etiology and Epidemiology of Emerging Infectious Diseases in Universities of Shandong, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, People’s Republic of China
| | - Zhenghai Ma
- College of Life Science and Technology, Xinjiang University, Urumchi, People’s Republic of China
| | - Ting Rong Luo
- Laboratory of Animal Infectious Diseases, Medical College & College of Animal Sciences and Veterinary Medicine, Guangxi University, Nanning, People’s Republic of China, Yuhai Bi CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing, 100101, People's Republic of China; Ting Rong Luo Laboratory of Animal Infectious Diseases, Medical College & College of Animal Sciences and Veterinary Medicine, Guangxi University, Nanning, 530005, People's Republic of China
| | - Yuhai Bi
- CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing, People’s Republic of China,University of Chinese Academy of Sciences, Beijing, People’s Republic of China, Yuhai Bi CAS Key Laboratory of Pathogen Microbiology and Immunology, Institute of Microbiology, Center for Influenza Research and Early-warning (CASCIRE), CAS-TWAS Center of Excellence for Emerging Infectious Diseases (CEEID), Chinese Academy of Sciences, Beijing, 100101, People's Republic of China; Ting Rong Luo Laboratory of Animal Infectious Diseases, Medical College & College of Animal Sciences and Veterinary Medicine, Guangxi University, Nanning, 530005, People's Republic of China
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Carnaccini S, Cáceres CJ, Gay LC, Ferreri LM, Skepner E, Burke DF, Brown IH, Geiger G, Obadan A, Rajao DS, Lewis NS, Perez DR. Antigenic mapping of the hemagglutinin of the H9 subtype influenza A viruses using sera from Japanese quail ( Coturnix c. japonica). J Virol 2023; 97:e0074323. [PMID: 37800947 PMCID: PMC10617583 DOI: 10.1128/jvi.00743-23] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 08/18/2023] [Indexed: 10/07/2023] Open
Abstract
IMPORTANCE Determining the relevant amino acids involved in antigenic drift on the surface protein hemagglutinin (HA) is critical to understand influenza virus evolution and efficient assessment of vaccine strains relative to current circulating strains. We used antigenic cartography to generate an antigenic map of the H9 hemagglutinin (HA) using sera produced in one of the most relevant minor poultry species, Japanese quail. Key antigenic positions were identified and tested to confirm their impact on the antigenic profile. This work provides a better understanding of the antigenic diversity of the H9 HA as it relates to reactivity to quail sera and will facilitate a rational approach for selecting more efficacious vaccines against poultry-origin H9 influenza viruses in minor poultry species.
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Affiliation(s)
- Silvia Carnaccini
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - C. Joaquín Cáceres
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - L. Claire Gay
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - Lucas M. Ferreri
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - Eugene Skepner
- Center for Pathogen Evolution, University of Cambridge, Cambridge, United Kingdom
| | - David F. Burke
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Genome Campus, Hinxton, United Kingdom
| | - Ian H. Brown
- Animal and Plant Health Agency (APHA), Weybridge, United Kingdom
| | - Ginger Geiger
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - Adebimpe Obadan
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - Daniela S. Rajao
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - Nicola S. Lewis
- World Influenza Centre, The Francis Crick Institute, London, United Kingdom
| | - Daniel R. Perez
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
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Liu T, Xie S, Yang Z, Zha A, Shi Y, Xu L, Chen J, Qi W, Liao M, Jia W. That H9N2 avian influenza viruses circulating in different regions gather in the same live-poultry market poses a potential threat to public health. Front Microbiol 2023; 14:1128286. [PMID: 36876085 PMCID: PMC9979309 DOI: 10.3389/fmicb.2023.1128286] [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: 12/20/2022] [Accepted: 01/20/2023] [Indexed: 02/18/2023] Open
Abstract
H9N2 avian influenza viruses are endemic and persistent in China, but those that are prevalent in different provinces are also causes of wide epidemics, related to the spread of wild birds and the cross-regional trade in live poultry. For the past 4 years, beginning in 2018, we have sampled a live-poultry market in Foshan, Guangdong, in this ongoing study. In addition to the prevalence of H9N2 avian influenza viruses in China during this period, we identified isolates from the same market belonging to clade A and clade B, which diverged in 2012-2013, and clade C, which diverged in 2014-2016, respectively. An analysis of population dynamics revealed that, after a critical divergence period from 2014 to 2016, the genetic diversity of H9N2 viruses peaked in 2017. Our spatiotemporal dynamics analysis found that clade A, B, and C, which maintain high rates of evolution, have different prevalence ranges and transmission paths. Clades A and B were mainly prevalent in East China in the early stage, and then spread to Southern China, becoming epidemic with clade C. Strains from different regions converge at the same live-poultry market to communicate, which may be one reasons the H9N2 viruses are difficult to eradicate and increasingly dominant throughout China. Selection pressure and molecular analysis have demonstrated that single amino acid polymorphisms at key receptor binding sites 156, 160, and 190 under positive selection pressure, suggesting that H9N2 viruses are undergoing mutations to adapt to new hosts. Live-poultry markets are important because people who visit them have frequent contact with poultry, H9N2 viruses from different regions converge at these markets and spread through contact between live birds and humans, generating increased risks of human exposure to these viruses and threatening public health safety. Thus, it is important to reducing the cross-regional trade of live poultry and strengthening the monitoring of avian influenza viruses in live-poultry markets to reduce the spread of avian influenza viruses.
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Affiliation(s)
- Tengfei Liu
- National Avian Influenza Para-Reference Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Shumin Xie
- National Avian Influenza Para-Reference Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Zhiyi Yang
- National Avian Influenza Para-Reference Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Aimin Zha
- National Avian Influenza Para-Reference Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Yuting Shi
- National Avian Influenza Para-Reference Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Lingyu Xu
- National Avian Influenza Para-Reference Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Junhong Chen
- National Avian Influenza Para-Reference Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Wenbao Qi
- National Avian Influenza Para-Reference Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis, Key Laboratory of Animal Vaccine Development, Ministry of Agriculture and Rural Affairs, Guangzhou, China.,Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou, China
| | - Ming Liao
- National Avian Influenza Para-Reference Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis, Key Laboratory of Animal Vaccine Development, Ministry of Agriculture and Rural Affairs, Guangzhou, China.,Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou, China
| | - Weixin Jia
- National Avian Influenza Para-Reference Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis, Key Laboratory of Animal Vaccine Development, Ministry of Agriculture and Rural Affairs, Guangzhou, China.,Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou, China
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Chen T, Tan Y, Song Y, Wei G, Li Z, Wang X, Yang J, Millman A, Chen M, Liu D, Huang T, Jiao M, He W, Zhao X, Greene C, Kile J, Zhou S, Zhang R, Zeng X, Guo Q, Wang D. Enhanced Environmental Surveillance for Avian Influenza A/H5, H7 and H9 Viruses in Guangxi, China, 2017-2019. BIOSAFETY AND HEALTH 2023. [DOI: 10.1016/j.bsheal.2022.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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9
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Status and Challenges for Vaccination against Avian H9N2 Influenza Virus in China. Life (Basel) 2022; 12:life12091326. [PMID: 36143363 PMCID: PMC9505450 DOI: 10.3390/life12091326] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 08/23/2022] [Accepted: 08/24/2022] [Indexed: 12/14/2022] Open
Abstract
In China, H9N2 avian influenza virus (AIV) has become widely prevalent in poultry, causing huge economic losses after secondary infection with other pathogens. Importantly, H9N2 AIV continuously infects humans, and its six internal genes frequently reassort with other influenza viruses to generate novel influenza viruses that infect humans, threatening public health. Inactivated whole-virus vaccines have been used to control H9N2 AIV in China for more than 20 years, and they can alleviate clinical symptoms after immunization, greatly reducing economic losses. However, H9N2 AIVs can still be isolated from immunized chickens and have recently become the main epidemic subtype. A more effective vaccine prevention strategy might be able to address the current situation. Herein, we analyze the current status and vaccination strategy against H9N2 AIV and summarize the progress in vaccine development to provide insight for better H9N2 prevention and control.
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Pan X, Su X, Ding P, Zhao J, Cui H, Yan D, Teng Q, Li X, Beerens N, Zhang H, Liu Q, de Jong MCM, Li Z. Maternal-derived antibodies hinder the antibody response to H9N2 AIV inactivated vaccine in the field. ANIMAL DISEASES 2022. [DOI: 10.1186/s44149-022-00040-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
AbstractThe H9N2 subtype avian influenza virus (AIV) inactivated vaccine has been used extensively in poultry farms, but it often fails to stimulate a sufficiently high immune response in poultry in the field, although it works well in laboratory experiments; hence, the virus still causes economic damage every year and poses a potential threat to public health. Based on surveillance data collected in the field, we found that broilers with high levels of maternal-derived antibodies (MDAs) against H9N2 virus did not produce high levels of antibodies after vaccination with a commercial H9N2 inactivated vaccine. In contrast, specific pathogen-free (SPF) chickens without MDAs responded efficiently to that vaccination. When MDAs were mimicked by administering passively transferred antibodies (PTAs) into SPF chickens in the laboratory, similar results were observed: H9N2-specific PTAs inhibited humoral immunity against the H9N2 inactivated vaccine, suggesting that H9N2-specific MDAs might hinder the generation of antibodies when H9N2 inactivated vaccine was used. After challenge with homologous H9N2 virus, the virus was detected in oropharyngeal swabs of the vaccinated and unvaccinated chickens with PTAs but not in the vaccinated chickens without PTAs, indicating that H9N2-specific MDAs were indeed one of the reasons for H9N2 inactivated vaccine failure in the field. When different titers of PTAs were used to mimic MDAs in SPF chickens, high (HI = 12 log2) and medium (HI = log 9 log2) titers of PTAs reduced the generation of H9N2-specific antibodies after the first vaccination, but a booster dose would induce a high and faster humoral immune response even of PTA interference. This study strongly suggested that high or medium titers of MDAs might explain H9N2 inactivated vaccine failure in the field.
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Genetic Diversity of the Hemagglutinin Genes of Influenza a Virus in Asian Swine Populations. Viruses 2022; 14:v14040747. [PMID: 35458477 PMCID: PMC9032595 DOI: 10.3390/v14040747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 03/29/2022] [Accepted: 03/31/2022] [Indexed: 01/04/2023] Open
Abstract
Swine influenza (SI) is a major respiratory disease of swine; SI is due to the influenza A virus of swine (IAV-S), a highly contagious virus with zoonotic potential. The intensity of IAV-S surveillance varies among countries because it is not a reportable disease and causes limited mortality in swine. Although Asia accounts for half of all pig production worldwide, SI is not well managed in those countries. Rigorously managing SI on pig farms could markedly reduce the economic losses, the likelihood of novel reassortants among IAV-S, and the zoonotic IAV-S infections in humans. Vaccination of pigs is a key control measure for SI, but its efficacy relies on the optimal antigenic matching of vaccine strains with the viral strains circulating in the field. Here, we phylogenetically reviewed the genetic diversity of the hemagglutinin gene among IAVs-S that have circulated in Asia during the last decade. This analysis revealed the existence of country-specific clades in both the H1 and H3 subtypes and cross-border transmission of IAVs-S. Our findings underscore the importance of choosing vaccine antigens for each geographic region according to both genetic and antigenic analyses of the circulating IAV-S to effectively manage SI in Asia.
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Antigenic Evolution Characteristics and Immunological Evaluation of H9N2 Avian Influenza Viruses from 1994–2019 in China. Viruses 2022; 14:v14040726. [DOI: 10.3390/v14040726] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/24/2022] [Accepted: 03/27/2022] [Indexed: 01/27/2023] Open
Abstract
The H9N2 subtype avian influenza viruses (AIVs) have been circulating in China for more than 20 years, attracting more and more attention due to the potential threat of them. At present, vaccination is a common prevention and control strategy in poultry farms, but as virus antigenicity evolves, the immune protection efficiency of vaccines has constantly been challenged. In this study, we downloaded the hemagglutinin (HA) protein sequences of the H9N2 subtype AIVs from 1994 to 2019 in China—with a total of 5138 sequences. The above sequences were analyzed in terms of time and space, and it was found that h9.4.2.5 was the most popular in various regions of China. Furthermore, the prevalence of H9N2 subtype AIVs in China around 2006 was different. The domestic epidemic branch was relatively diversified from 1994 to 2006. After 2006, the epidemic branch each year was h9.4.2.5. We compared the sequences around 2006 as a whole and screened out 15 different amino acid positions. Based on the HA protein of A/chicken/Guangxi/55/2005 (GX55), the abovementioned amino acid mutations were completed. According to the 12-plasmid reverse genetic system, the rescue of the mutant virus was completed using A/PuertoRico/8/1934 (H1N1) (PR8) as the backbone. The cross hemagglutination inhibition test showed that these mutant sites could transform the parental strain from the old to the new antigenic region. Animal experiments indicated that the mutant virus provided significant protection against the virus from the new antigenic region. This study revealed the antigenic evolution of H9N2 subtype AIVs in China. At the same time, it provided an experimental basis for the development of new vaccines.
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13
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Abstract
The H9N2 subtype avian influenza virus (AIV) has become endemic in poultry globally; however due to its low pathogenicity, it is not under primary surveillance and control in many countries. Recent reports of human infection caused by H9N2 AIV has increased public concern. This study investigated the genetic and antigenic characteristics of H9N2 AIV isolated from local markets in nine provinces in Southern China from 2013 to 2018. We detected an increasing annual isolation rate of H9N2 AIV. Phylogenetic analyses of hemagglutinin (HA) genes suggests that isolated strains were rooted in BJ94 lineage but have evolved into new subgroups (II and III), which derived from subgroup I. The estimated substitution rate of the subgroup III strains was 6.23 × 10−3 substitutions/site/year, which was 1.5-fold faster than that of the average H9N2 HA rate (3.95 × 10−3 substitutions/site/year). Based on the antigenic distances, subgroup II and III strains resulted in two clear antigenic clusters 2 and 3, separated from the vaccine strain F98, cluster 1. New antigenic properties of subgroup III viruses were associated with 11 amino acid changes in the HA protein, suggesting antigenic drift in H9N2 viruses. Our phylogenetic and antigenic analyses of the H9N2 strains circulating in local markets in Southern China provide new insights on the antigenic diversification of H9N2 viruses. IMPORTANCE The H9N2 low pathogenicity avian influenza (LPAI) virus has become endemic in poultry globally. In several Asian countries, vaccination against H9N2 avian influenza virus (AIV) was approved to reduce economic losses in the poultry industry. However, surveillance programs initiated after the introduction of vaccination identified the persistence of H9N2 AIV in poultry (especially in chicken in South Korea and China). Recent reports of human infection caused by H9N2 AIV has increased public concern. Surveillance of H9N2 circulating in poultry in the fields or markets was essential to update the vaccination strategies. This study investigated the genetic and antigenic characteristics of H9N2 AIVs isolated from local markets in nine provinces in Southern China from 2013 to 2018. The discovery of mutations in the hemagglutinin (HA) gene that result in antigenic changes provides a baseline reference for evolutionary studies of H9N2 viruses and vaccination strategies in poultry.
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14
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Sun Y, Cong Y, Yu H, Ding Z, Cong Y. Assessing the effects of a two-amino acid flexibility in the Hemagglutinin 220-loop receptor-binding domain on the fitness of Influenza A(H9N2) viruses. Emerg Microbes Infect 2021; 10:822-832. [PMID: 33866955 PMCID: PMC8812783 DOI: 10.1080/22221751.2021.1919566] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 03/25/2021] [Accepted: 04/15/2021] [Indexed: 01/13/2023]
Abstract
The enzootic and zoonotic nature of H9N2 avian influenza viruses poses a persistent threat to the global poultry industry and public health. In particular, the emerging sublineage h9.4.2.5 of H9N2 viruses has drawn great attention. In this study, we determined the effects of the flexibility at residues 226 and 227 in the hemagglutinin on the receptor avidity and immune evasion of H9N2 viruses. The solid-phase direct binding assay showed that residue 226 plays a core role in the receptor preference of H9N2 viruses, while residue 227 affects the preference of the virus for a receptor. Consequently, each of these two successive residues can modulate the receptor avidity of H9N2 viruses and influence their potential of zoonotic infection. The antigenic map based on the cross-hemagglutination inhibition (HI) titers revealed that amino acid substitutions at positions 226 or 227 appear to be involved in antigenic drift, potentially resulting in the emergence of H9N2 immune evasion mutants. Further analysis suggested that increased receptor avidity facilitated by residue 226Q or 227M resulted in a reduction in the HI titer. Among the four naturally-occurring amino acid combinations comprising QQ, MQ, LQ, and LM, the number of viruses with LM accounted for 79.64% of the sublineage h9.4.2.5 and the rescued virus with LM exhibited absolute advantages of in vitro and in vivo replication and transmission. Collectively, these data demonstrate that residues 226 and 227 are under selective pressure and their synergistic regulation of receptor avidity and antigenicity is related to the evolution of circulating H9N2 viruses.
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Affiliation(s)
- Yixue Sun
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, People’s Republic of China
- JilinResearch & Development Center of Biomedical Engineering, Chanchung University, Changchun, People's Republic of China
| | - Yulin Cong
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, People’s Republic of China
| | - Haiying Yu
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, People’s Republic of China
| | - Zhuang Ding
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, People’s Republic of China
| | - Yanlong Cong
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Key Laboratory of Zoonosis Research, Ministry of Education, Jilin University, Changchun, People’s Republic of China
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15
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Nugroho CMH, Silaen OSM, Kurnia RS, Soejoedono RD, Poetri ON, Soebandrio A. Isolation and molecular characterization of the hemagglutinin gene of H9N2 avian influenza viruses from poultry in Java, Indonesia. J Adv Vet Anim Res 2021; 8:423-434. [PMID: 34722740 PMCID: PMC8520164 DOI: 10.5455/javar.2021.h530] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 07/08/2021] [Accepted: 07/13/2021] [Indexed: 12/01/2022] Open
Abstract
Objective: The avian influenza virus (AIV) subtype H9N2 circulating in Indonesia has raised increasing concern about its impact on poultry and its public health risks. In this study, the H9N2 virus from chicken poultry farms in Java was isolated and characterized molecularly. Materials and Methods: Thirty-three pooled samples of chicken brain, cloacal swab, trachea, and oviduct were taken from multiple chickens infected with AIV in five regions of Java, Indonesia. The samples were isolated from specific pathogenic-free embryonated eggs that were 9 days old. Reverse transcription polymerase chain reaction and sequencing were used to identify H9N2 viruses. Results: This study was successful in detecting and characterizing 13 H9N2 isolates. The sequencing analysis of hemagglutinin genes revealed a 96.9%–98.8% similarity to the H9N2 AIV isolated from Vietnam in 2014 (A/muscovy duck/Vietnam/LBM719/2014). According to the phylogenetic analysis, all recent H9N2 viruses were members of the lineage Y280 and clade h9.4.2.5. Nine of the H9N2 isolates studied showed PSKSSR↓GLF motifs at the cleavage site, while four had PSKSSR↓GLF. Notably, all contemporary viruses have leucine (L) at position 216 in the receptor-binding region, indicating that the virus can interact with a human-like receptor. Conclusion: This study described the features of recent H9N2 viruses spreading in Java’s poultry industry. Additionally, H9N2 infection prevention and management must be implemented to avoid the occurrence of virus mutations in the Indonesian poultry industry.
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Affiliation(s)
| | | | - Ryan Septa Kurnia
- Doctoral Program Biomedical Science, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
| | - Retno Damajanti Soejoedono
- Department of Animal Diseases and Public Health, Faculty of Veterinary Medicine, IPB University, Bogor, Indonesia
| | - Okti Nadia Poetri
- Department of Animal Diseases and Public Health, Faculty of Veterinary Medicine, IPB University, Bogor, Indonesia
| | - Amin Soebandrio
- Eijkman Institute for Molecular Biology, Jakarta, Indonesia.,Department of Microbiology, Faculty of Medicine, University of Indonesia, Jakarta, Indonesia
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RNA-Seq Analysis of Influenza A Virus-Induced Transcriptional Changes in Mice Lung and Its Possible Implications for the Virus Pathogenicity in Mice. Viruses 2021; 13:v13102031. [PMID: 34696461 PMCID: PMC8538690 DOI: 10.3390/v13102031] [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: 09/03/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 12/13/2022] Open
Abstract
The influenza A virus (IAV) is an important cause of respiratory disease worldwide. It is well known that alveolar epithelial cells are the target cells for the IAV, but there is relatively limited knowledge regarding the role of macrophages during IAV infection. Here, we aimed to analyze transcriptome differences in mouse lungs and macrophage (RAW264.7) cell lines infected with either A/California/04/2009 H1N1 (CA09) or A/chicken/SD/56/2015 H9N2 (SD56) using deep sequencing. The uniquely differentially expressed genes (UDEGs) were analyzed with the Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) databases; the results showed that the lungs infected with the two different viruses had different enrichments of pathways and terms. Interestingly, CA09 virus infection in mice was mostly involved with genes related to the extracellular matrix (ECM), while the most significant differences after SD56 infection in mice were in immune-related genes. Gene set enrichment analysis (GSEA) of RAW264.7 cells revealed that regulation of the cell cycle was of great significance after CA09 infection, whereas the regulation of the immune response was most enriched after SD56 infection, which was consistent with analysis results in the lung. Similar results were obtained from weighted gene co-expression network analysis (WGCNA), where cell cycle regulation was extensively activated in RAW264.7 macrophages infected with the CA09 virus. Disorder of the cell cycle is likely to affect their normal immune regulation, which may be an important factor leading to their different prognoses. These results provide insight into the mechanism of the CA09 virus that caused a pandemic and explain the different reactivities of monocytes/macrophages infected by H9N2 and H1N1 IAV subtypes.
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Traceable surveillance and genetic diversity analysis of coronaviruses in poultry from China in 2019. Virus Res 2021; 306:198566. [PMID: 34582833 PMCID: PMC8464398 DOI: 10.1016/j.virusres.2021.198566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 09/13/2021] [Accepted: 09/15/2021] [Indexed: 11/20/2022]
Abstract
Coronavirus disease 2019 (COVID-19), caused by Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), was first reported in Wuhan, China, and rapidly spread throughout the world. This newly emerging pathogen is highly transmittable and can cause fatal disease. More than 35 million cases have been confirmed, with a fatality rate of about 2.9% to October 9, 2020. However, the original and intermediate hosts of SARS-CoV-2 remain unknown. Here, 3160 poultry samples collected from 14 provinces of China between September and December 2019 were tested for SARS-CoV-2 infection. All the samples were SARS-CoV-2 negative, but 593 avian coronaviruses were detected, including 485 avian infectious bronchitis viruses, 72 duck coronaviruses, and 36 pigeon coronaviruses, with positivity rates of 15.35%, 2.28%, and 1.14%, respectively. Our surveillance demonstrates the diversity of avian coronaviruses in China, with higher prevalence rates in some regions. Furthermore, the possibility that SARS-CoV-2 originated from a known avian-origin coronavirus can be preliminarily ruled out. More surveillance of and research into avian coronaviruses are required to better understand the diversity, distribution, cross-species transmission, and clinical significance of these viruses.
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18
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Jin JH, Wang JJ, Ren YC, Liu S, Li JP, Hou GY, Liu HL, Zhuang QY, Wang SC, Jiang WM, Yu XH, Yu JM, Yuan LP, Peng C, Zhang GZ, Chen JM. A set of RT-PCR assays for detection of all known avian paramyxoviruses and application in surveillance of avian paramyxoviruses in China. PeerJ 2021; 9:e10748. [PMID: 33717667 PMCID: PMC7937338 DOI: 10.7717/peerj.10748] [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: 08/13/2020] [Accepted: 12/18/2020] [Indexed: 12/13/2022] Open
Abstract
Background Avian paramyxoviruses (APMVs), also termed avian avulaviruses, are of a vast diversity and great significance in poultry. Detection of all known APMVs is challenging, and distribution of APMVs have not been well investigated. Methods A set of reverse transcription polymerase chain reaction (RT-PCR) assays for detection of all known APMVs were established using degenerate primers targeting the viral polymerase L gene. The assays were preliminarily evaluated using in-vitro transcribed double-stranded RNA controls and 24 known viruses, and then they were employed to detect 4,346 avian samples collected from 11 provinces. Results The assays could detect 20-200 copies of the double-stranded RNA controls, and detected correctly the 24 known viruses. Of the 4,346 avian samples detected using the assays, 72 samples were found positive. Of the 72 positives, 70 were confirmed through sequencing, indicating the assays were specific for APMVs. The 4,346 samples were also detected using a reported RT-PCR assay, and the results showed this RT-PCR assay was less sensitive than the assays reported here. Of the 70 confirmed positives, 40 were class I Newcastle disease virus (NDV or APMV-1) and 27 were class II NDV from poultry including chickens, ducks, geese, and pigeons, and three were APMV-2 from parrots. The surveillance identified APMV-2 in parrots for the first time, and revealed that prevalence of NDVs in live poultry markets was higher than that in poultry farms. The surveillance also suggested that class I NDVs in chickens could be as prevalent as in ducks, and class II NDVs in ducks could be more prevalent than in chickens, and class II NDVs could be more prevalent than class I NDVs in ducks. Altogether, we developed a set of specific and sensitive RT-PCR assays for detection of all known APMVs, and conducted a large-scale surveillance using the assays which shed novel insights into APMV epidemiology.
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Affiliation(s)
- Ji-Hui Jin
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Jing-Jing Wang
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Ying-Chao Ren
- Department for Animal Health Assessment, China Animal Health and Epidemiology Center, Qingdao, China
| | - Shuo Liu
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Jin-Ping Li
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Guang-Yu Hou
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Hua-Lei Liu
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Qing-Ye Zhuang
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Su-Chun Wang
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Wen-Ming Jiang
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Xiao-Hui Yu
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Jian-Min Yu
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Li-Ping Yuan
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Cheng Peng
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
| | - Guo-Zhong Zhang
- Key Laboratory of Animal Epidemiology of the Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Ji-Ming Chen
- Laboratory for Avian Disease Surveillance (OIE Reference Laboratory for Newcastle Disease), China Animal Health and Epidemiology Center, Qingdao, China
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19
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Zhang S, Yu J, He L, Gong L, Hou S, Zhu M, Wu J, Su B, Liu J, Wu G, He J. Molecular characteristics of the H9N2 avian influenza viruses in live poultry markets in Anhui Province, China, 2013 to 2018. Health Sci Rep 2021; 4:e230. [PMID: 33437876 PMCID: PMC7787659 DOI: 10.1002/hsr2.230] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 09/26/2020] [Accepted: 10/14/2020] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND AIMS H9N2 subtype avian influenza virus (AIV) has low-pathogenicity but causes respiratory symptoms and drop in egg production in chicken with long-term virus shedding, resulting in great economic losses due to high mortality related to secondary infection with other pathogens. In recent years, H9N2 viruses have been posing a threat to public health, causing human infection in China. Compared to studies on other AIV subtypes, there are relatively few studies on the pathogenic mechanism of the H9N2 virus in mammals. H9N2 subtype AIV has been circulating worldwide in many avian species and transmitting with high efficiency in poultry. It can provide internal genes for other subtypes to produce new viruses, causing a pandemic risk. It is important to carry out long-term surveillance and pathogenic characteristics of the H9N2 virus. In this study, we conducted environmental surveillance of live poultry markets in Anhui province from 2013 to 2018, and 33 representative environmental isolates were selected and studied systematically. METHODS The genomic RNA of Anhui H9N2 isolates was subjected to RT-PCR amplification followed by sequencing analysis. RESULTS Thirty-three strains were isolated from the embryonated eggs of specific-pathogen-free chickens. Phylogenetic analysis indicated that h9.4.2.5-like H9N2 viruses were predominant during 2013-2018 and acquired multiple specific amino acid mutations that may have increased their affinity for mammals and enhanced their infectivity and transmissibility. Additionally, six internal genes of H9N2 clustered together with the novel human-lethal reassortant viruses, such as the low-pathogenicity H7N9, H10N8, and Anhui H5N6 viruses, and even HPAI H7N9. CONCLUSION Because H9N2 viruses may be the donors of internal genes that lead to the generation of novel reassortant viruses with enhanced pathogenicity in Anhui province, continuous environmental surveillance of live poultry markets, a key source of reassorted H9N2 and other avian influenza viruses, is of great importance.
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Affiliation(s)
- Shuxia Zhang
- National Institute for Viral Disease Control and PreventionChina Center for Disease Control and PreventionBeijingChina
| | - Jun‐Ling Yu
- Department of Microbiological Laboratory, Anhui Provincial Center for Disease Control and PreventionKey Laboratory for Medical and Health of the 13th Five‐Year Plan in Anhui ProvinceHefeiChina
| | - Lan He
- Department of Microbiological Laboratory, Anhui Provincial Center for Disease Control and PreventionKey Laboratory for Medical and Health of the 13th Five‐Year Plan in Anhui ProvinceHefeiChina
| | - Lei Gong
- Department of Acute Infectious Disease PreventionAnhui Provincial Center for Disease Control and PreventionHefeiChina
| | - Sai Hou
- Department of Acute Infectious Disease PreventionAnhui Provincial Center for Disease Control and PreventionHefeiChina
| | - Meng Zhu
- Department of Acute Infectious Disease PreventionAnhui Provincial Center for Disease Control and PreventionHefeiChina
| | - Jia‐Bing Wu
- Department of Acute Infectious Disease PreventionAnhui Provincial Center for Disease Control and PreventionHefeiChina
| | - Bin Su
- Department of Microbiological Laboratory, Anhui Provincial Center for Disease Control and PreventionKey Laboratory for Medical and Health of the 13th Five‐Year Plan in Anhui ProvinceHefeiChina
| | - Jia Liu
- National Institute for Viral Disease Control and PreventionChina Center for Disease Control and PreventionBeijingChina
| | - Guizhen Wu
- National Institute for Viral Disease Control and PreventionChina Center for Disease Control and PreventionBeijingChina
| | - Jun He
- Department of Microbiological Laboratory, Anhui Provincial Center for Disease Control and PreventionKey Laboratory for Medical and Health of the 13th Five‐Year Plan in Anhui ProvinceHefeiChina
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Liu Y, Li S, Sun H, Pan L, Cui X, Zhu X, Feng Y, Li M, Yu Y, Wu M, Lin J, Xu F, Yuan S, Huang S, Sun H, Liao M. Variation and Molecular Basis for Enhancement of Receptor Binding of H9N2 Avian Influenza Viruses in China Isolates. Front Microbiol 2020; 11:602124. [PMID: 33391219 PMCID: PMC7773702 DOI: 10.3389/fmicb.2020.602124] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 11/03/2020] [Indexed: 11/13/2022] Open
Abstract
Currently, H9N2 avian influenza viruses (H9N2 AIVs) globally circulate in poultry and have acquired some adaptation to mammals. However, it is not clear what the molecular basis is for the variation in receptor-binding features of the H9N2 AIVs. The receptor-binding features of 92 H9N2 AIVs prevalent in China during 1994-2017 were characterized through solid-phase ELISA assay and reverse genetics. H9N2 AIVs that circulated in this period mostly belonged to clade h9.4.2. Two increasing incidents occurred in the ability of H9N2 AIVs to bind to avian-like receptors in 2002-2005 and 2011-2014. Two increasing incidents occurred in the strength of H9N2 AIVs to bind to human-like receptors in 2002-2005 and 2011-2017. We found that Q227M, D145G/N, S119R, and R246K mutations can significantly increase H9N2 AIVs to bind to both avian- and human-like receptors. A160D/N, Q156R, T205A, Q226L, V245I, V216L, D208E, T212I, R172Q, and S175N mutations can significantly enhance the strength of H9N2 AIVs to bind to human-like receptors. Our study also identified mutations T205A, D208E, V216L, Q226L, and V245I as the key sites leading to enhanced receptor binding of H9N2 AIVs during 2002-2005 and mutations S119R, D145G, Q156R, A160D, T212I, Q227M, and R246K as the key sites leading to enhanced receptor binding of H9N2 AIVs during 2011-2017. These findings further illustrate the receptor-binding characteristics of avian influenza viruses, which can be a potential threat to public health.
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Affiliation(s)
- Yang Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Shuo Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Huapeng Sun
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Liangqi Pan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Xinxin Cui
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Xuhui Zhu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Yaling Feng
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Mingliang Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Yanan Yu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Meihua Wu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Jiate Lin
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Fengxiang Xu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Shaohua Yuan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Shujian Huang
- School of Life Science and Engineering, Foshan University, Foshan, China
| | - Hailiang Sun
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
| | - Ming Liao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou, China.,Key Laboratory of Zoonoses Control and Prevention of Guangdong, Guangzhou, China
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21
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Zhuang Q, Liu S, Zhang X, Jiang W, Wang K, Wang S, Peng C, Hou G, Li J, Yu X, Yuan L, Wang J, Li Y, Liu H, Chen J. Surveillance and taxonomic analysis of the coronavirus dominant in pigeons in China. Transbound Emerg Dis 2020; 67:1981-1990. [PMID: 32163661 PMCID: PMC7228218 DOI: 10.1111/tbed.13541] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 03/04/2020] [Accepted: 03/04/2020] [Indexed: 11/30/2022]
Abstract
Coronaviruses (CoVs) are found in humans and a wide variety of wild and domestic animals, and of substantial impact on human and animal health. In poultry, the genetic diversity, evolution, distribution and taxonomy of CoVs dominant in birds other than chickens remain enigmatic. In our previous study, we proposed that the CoVs dominant (i.e. mainly circulating) in ducks (DdCoVs) should represent a novel species, which was different from the one represented by the CoVs dominant in chickens (CdCoVs). In this study, we conducted a large-scale surveillance of CoVs in chickens, ducks, geese, pigeons and other birds (quails, sparrows and partridges) using a conserved RT-PCR assay. The surveillance demonstrated that CdCoVs, DdCoVs and the CoVs dominant in pigeons (PdCoVs) belong to different lineages, and they are all prevalent in live poultry markets and the backyard flocks in some regions of China. We further sequenced seven Coronaviridae-wide conserved domains in their replicase polyprotein pp1ab of seven PdCoVs and found that the genetic distances in these domains between PdCoVs and DdCoVs or CdCoVs are large enough to separate PdCoVs into a novel species, which were different from the ones represented by DdCoVs or CdCoVs within the genus Gammacoronavirus, per the species demarcation criterion of International Committee on Taxonomy of Viruses. This report shed novel insight into the genetic diversity, distribution, evolution and taxonomy of avian CoVs.
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Affiliation(s)
- Qingye Zhuang
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Shuo Liu
- China Animal Health and Epidemiology CenterQingdaoChina
| | | | - Wenming Jiang
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Kaicheng Wang
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Suchun Wang
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Cheng Peng
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Guangyu Hou
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Jinping Li
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Xiaohui Yu
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Liping Yuan
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Jingjing Wang
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Yang Li
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Hualei Liu
- China Animal Health and Epidemiology CenterQingdaoChina
| | - Jiming Chen
- China Animal Health and Epidemiology CenterQingdaoChina
- College of Veterinary MedicineQingdao Agricultural UniversityQingdaoChina
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22
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Zhang RH, Li PY, Xu MJ, Wang CL, Li CH, Gao JP, Wang XJ, Xu T, Zhang HL, Zhang RH, Tian SF. Molecular characterization and pathogenesis of H9N2 avian influenza virus isolated from a racing pigeon. Vet Microbiol 2020; 246:108747. [PMID: 32605760 DOI: 10.1016/j.vetmic.2020.108747] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 05/31/2020] [Accepted: 05/31/2020] [Indexed: 12/14/2022]
Abstract
H9N2 avian influenza viruses (AIVs) can cross species barriers and expand from birds tomammals and humans. It usually leads to economic loss for breeding farms and poses a serious threat to human health.This study investigated the molecular characteristics of H9N2 AIV isolated from a racing pigeon and its pathogenesis in BALB/c mice and pigeons. Phylogenetic analysis indicated that the H9N2 virus belonged to the Ck/BJ/94-like lineage, and acquired multiple specific amino acid substitutions that might contribute to viral transmission from birds to mammals and humans. A pathogenesis study showed that both mice and pigeons infected with H9N2 virus showed clinical signs and mortality. The H9N2 viruses efficiently replicated in mice and pigeons. In our study, high levels of viral shedding were detected in pigeons, but the infection was not transmitted to co-housed pigeons. Histopathological examination revealed the presence of inflammatory responses in the infected mice and pigeons. Immunohistochemical analysis showed the presence of H9N2 virus in multiple organs of the infected mice and pigeons. Moreover, the infected mice and pigeons demonstrated significant cytokine/chemokine production. Our results showed that the H9N2 virus can infect mice and pigeons, and can not be transmitted between pigeons through direct contact.
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Affiliation(s)
- Rui-Hua Zhang
- Key Laboratory of Preventive Veterinary Medicine, Department of Veterinary Medicine, Animal Science College, Hebei North University, Zhangjiakou, 075131, PR China
| | - Pei-Yao Li
- Key Laboratory of Preventive Veterinary Medicine, Department of Veterinary Medicine, Animal Science College, Hebei North University, Zhangjiakou, 075131, PR China
| | - Ming-Ju Xu
- Key Laboratory of Preventive Veterinary Medicine, Department of Veterinary Medicine, Animal Science College, Hebei North University, Zhangjiakou, 075131, PR China
| | - Cun-Lian Wang
- Key Laboratory of Preventive Veterinary Medicine, Department of Veterinary Medicine, Animal Science College, Hebei North University, Zhangjiakou, 075131, PR China
| | - Chun-Hong Li
- Key Laboratory of Preventive Veterinary Medicine, Department of Veterinary Medicine, Animal Science College, Hebei North University, Zhangjiakou, 075131, PR China
| | - Jing-Ping Gao
- Key Laboratory of Preventive Veterinary Medicine, Department of Veterinary Medicine, Animal Science College, Hebei North University, Zhangjiakou, 075131, PR China
| | - Xue-Jing Wang
- The Animal Husbandry and Veterinary Institute of Heibei, Baoding, 071001, PR China
| | - Tong Xu
- Key Laboratory of Preventive Veterinary Medicine, Department of Veterinary Medicine, Animal Science College, Hebei North University, Zhangjiakou, 075131, PR China.
| | - Hong-Liang Zhang
- Department of Veterinary Medicine, Qingdao Agricultural University, Qingdao, 266109, PR China.
| | - Rui-Hong Zhang
- BaYin Central School, ChaYouZhongQi, Wulanchabu, Inner Mongolia, 013550, PR China
| | - Shu-Fei Tian
- Key Laboratory of Preventive Veterinary Medicine, Department of Veterinary Medicine, Animal Science College, Hebei North University, Zhangjiakou, 075131, PR China
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23
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Abstract
Influenza A viruses (IAVs) of the H9 subtype are enzootic in Asia, the Middle East, and parts of North and Central Africa, where they cause significant economic losses to the poultry industry. Of note, some strains of H9N2 viruses have been linked to zoonotic episodes of mild respiratory diseases. Because of the threat posed by H9N2 viruses to poultry and human health, these viruses are considered of pandemic concern by the World Health Organization (WHO). H9N2 IAVs continue to diversify into multiple antigenically and phylogenetically distinct lineages that can further promote the emergence of strains with pandemic potential. Somewhat neglected compared with the H5 and H7 subtypes, there are numerous indicators that H9N2 viruses could be involved directly or indirectly in the emergence of the next influenza pandemic. The goal of this work is to discuss the state of knowledge on H9N2 IAVs and to provide an update on the contemporary global situation.
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Affiliation(s)
- Silvia Carnaccini
- Department of Population Health, Poultry Diagnostic and Research Center, University of Georgia, Athens, Georgia 30602, USA
| | - Daniel R Perez
- Department of Population Health, Poultry Diagnostic and Research Center, University of Georgia, Athens, Georgia 30602, USA
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24
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Su H, Zhao Y, Zheng L, Wang S, Shi H, Liu X. Effect of the selection pressure of vaccine antibodies on evolution of H9N2 avian influenza virus in chickens. AMB Express 2020; 10:98. [PMID: 32462233 PMCID: PMC7253569 DOI: 10.1186/s13568-020-01036-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 05/23/2020] [Indexed: 12/03/2022] Open
Abstract
H9N2 avian influenza virus has spread worldwide, and vaccination with an inactivated virus is currently the major prevention method in China. To further understand the effect of the selection pressure from antibodies on the evolution of H9N2 avian influenza virus, F/98 (A/Chicken/Shanghai/F/98), which is the vaccine representative of H9N2 avian influenza virus in East China, was used for serial passaging for 20 generations in chickens with and without vaccination. After plaque purification from trachea and lung tissues, 390 quasispecies were obtained. The second-generation quasispecies under the selection pressure of vaccine antibodies had undergone 100% antigen variation, while after passaging to the fifth generation, only 30-40% of the quasispecies displayed antigen variation when there was no selection pressure of vaccine antibodies, implying that the selection pressure of vaccine antibodies promotes the antigen variation of F/98. We found for the first time that there were three mutation hotspots in the HA genes of the quasispecies under the selection pressure of vaccine antibodies, which were K131R, A168T, and N201D. Moreover, under the selection pressure of vaccine antibodies, 10 amino acids (67-76) of the NA protein of all quasispecies were deleted, and PB2 of the quasispecies had undergone a high-frequency R355K mutation. However, without selection pressure of vaccine antibodies, NP had undergone two high-frequency mutations, namely, V186I and L466I, and a high-frequency mutation of L77I appeared in the NS gene. This result shows that the vaccine antibody selection pressure could control and regulate gene variation of the F/98 virus. Compared to that of the parental virus F/98, the EID50 of the twentieth passaged virus under the selection pressure of vaccine antibodies did not change, while the EID50 of the twentieth passaged virus without selection pressure of vaccine antibodies was significantly enhanced by 794 times. Furthermore, the twentieth passaged virus with selection pressure from vaccine antibodies lost its lethal ability in embryonated chicken eggs, whereas the EID50 of the twentieth passaged virus without selection pressure of vaccine antibodies increased to 6.3 times that of the F/98 strain. All the above results show that the selection pressure of vaccine antibodies promotes the antigen variation of H9N2 avian influenza virus and plays a role in regulating and controlling gene mutation of H9N2 avian influenza virus.
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Affiliation(s)
- Hailong Su
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009 Jiangsu China
| | - Yu Zhao
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009 Jiangsu China
| | - Lirong Zheng
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009 Jiangsu China
| | - Shifeng Wang
- Department of Infectious Diseases and Immunology, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611-0880 USA
| | - Huoying Shi
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009 Jiangsu People’s Republic of China
- Key Laboratory of Avian Preventive Medicine, Ministry of Education, Yangzhou University, Yangzhou, China
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, 225009 Jiangsu China
- Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou, 225009 Jiangsu China
| | - Xiufan Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, 225009 Jiangsu China
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25
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Liu S, Zhuang Q, Wang S, Jiang W, Jin J, Peng C, Hou G, Li J, Yu J, Yu X, Liu H, Sun S, Yuan L, Chen J. Control of avian influenza in China: Strategies and lessons. Transbound Emerg Dis 2020; 67:1463-1471. [PMID: 32065513 DOI: 10.1111/tbed.13515] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 01/13/2020] [Accepted: 02/13/2020] [Indexed: 11/30/2022]
Abstract
In recent decades, multiple subtypes (i.e. H9N2, H5N1 and H7N9) of avian influenza virus (AIV) have become widespread in China, which has caused enormous economic losses and posed considerable threats to public health. In this review, with the aim to provide insights into and guidelines for the control of AIV spread in China and globally in the future, we analysed the reasons why AIV has persisted in China based on socio-economic features, including poultry biosecurity, live bird markets, live bird transportation, wild birds, poultry waterfowl, poultry density, poultry population and infected birds. We also described the present status of the AIV subtypes H9, H5 and H7 in China to elucidate the effectiveness of the strategies currently employed in China (i.e. culling, mass vaccination and biosecurity improvement) to control the disease based on a literature review and our unpublished surveillance data collected over a 12-year period from 2007 to 2018. We then summarized the lessons to be learned from the control experience in China, including whether culling of infected birds is of limited value for disease control and whether improved biosecurity is a better option than culling and vaccination for the long-term control of AIV, and when the vaccine strain should be updated.
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Affiliation(s)
- Shuo Liu
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Qingye Zhuang
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Suchun Wang
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Wenming Jiang
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Jihui Jin
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Cheng Peng
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Guangyu Hou
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Jinping Li
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Jianmin Yu
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Xiaohui Yu
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Hualei Liu
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Shufang Sun
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Liping Yuan
- China Animal Health and Epidemiology Center, Qingdao, China
| | - Jiming Chen
- China Animal Health and Epidemiology Center, Qingdao, China
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26
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Suttie A, Tok S, Yann S, Keo P, Horm SV, Roe M, Kaye M, Sorn S, Holl D, Tum S, Barr IG, Hurt AC, Greenhill AR, Karlsson EA, Vijaykrishna D, Deng YM, Dussart P, Horwood PF. The evolution and genetic diversity of avian influenza A(H9N2) viruses in Cambodia, 2015 - 2016. PLoS One 2019; 14:e0225428. [PMID: 31815945 PMCID: PMC6901181 DOI: 10.1371/journal.pone.0225428] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 11/04/2019] [Indexed: 11/18/2022] Open
Abstract
Low pathogenic A(H9N2) subtype avian influenza viruses (AIVs) were originally detected in Cambodian poultry in 2013, and now circulate endemically. We sequenced and characterised 64 A(H9N2) AIVs detected in Cambodian poultry (chickens and ducks) from January 2015 to May 2016. All A(H9) viruses collected in 2015 and 2016 belonged to a new BJ/94-like h9-4.2.5 sub-lineage that emerged in the region during or after 2013, and was distinct to previously detected Cambodian viruses. Overall, there was a reduction of genetic diversity of H9N2 since 2013, however two genotypes were detected in circulation, P and V, with extensive reassortment between the viruses. Phylogenetic analysis showed a close relationship between A(H9N2) AIVs detected in Cambodian and Vietnamese poultry, highlighting cross-border trade/movement of live, domestic poultry between the countries. Wild birds may also play a role in A(H9N2) transmission in the region. Some genes of the Cambodian isolates frequently clustered with zoonotic A(H7N9), A(H9N2) and A(H10N8) viruses, suggesting a common ecology. Molecular analysis showed 100% of viruses contained the hemagglutinin (HA) Q226L substitution, which favours mammalian receptor type binding. All viruses were susceptible to the neuraminidase inhibitor antivirals; however, 41% contained the matrix (M2) S31N substitution associated with resistance to adamantanes. Overall, Cambodian A(H9N2) viruses possessed factors known to increase zoonotic potential, and therefore their evolution should be continually monitored.
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Affiliation(s)
- Annika Suttie
- Virology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, Phnom Penh, Cambodia
- School of Health and Life Sciences, Federation University, Churchill, Australia
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Songha Tok
- Virology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, Phnom Penh, Cambodia
| | - Sokhoun Yann
- Virology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, Phnom Penh, Cambodia
| | - Ponnarath Keo
- Virology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, Phnom Penh, Cambodia
| | - Srey Viseth Horm
- Virology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, Phnom Penh, Cambodia
| | - Merryn Roe
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Matthew Kaye
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - San Sorn
- National Animal Health and Production Research Institute, General Directorate of Animal Health and Production, Cambodian Ministry of Agriculture, Forestry and Fisheries, Phnom Penh, Cambodia
| | - Davun Holl
- National Animal Health and Production Research Institute, General Directorate of Animal Health and Production, Cambodian Ministry of Agriculture, Forestry and Fisheries, Phnom Penh, Cambodia
| | - Sothyra Tum
- National Animal Health and Production Research Institute, General Directorate of Animal Health and Production, Cambodian Ministry of Agriculture, Forestry and Fisheries, Phnom Penh, Cambodia
| | - Ian G. Barr
- School of Health and Life Sciences, Federation University, Churchill, Australia
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
- Department of Microbiology and Immunology, The University of Melbourne, Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Aeron C. Hurt
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Andrew R. Greenhill
- School of Health and Life Sciences, Federation University, Churchill, Australia
| | - Erik A. Karlsson
- Virology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, Phnom Penh, Cambodia
| | - Dhanasekaran Vijaykrishna
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Melbourne, Victoria Australia
| | - Yi-Mo Deng
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Philippe Dussart
- Virology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, Phnom Penh, Cambodia
- * E-mail: (PH); (PD)
| | - Paul F. Horwood
- Virology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, Phnom Penh, Cambodia
- College of Public Health, Medical and Veterinary Sciences, James Cook University, Townsville, Australia
- * E-mail: (PH); (PD)
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27
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Cheng W, Chong KC, Lau SYF, Wang X, Yu Z, Liu S, Wang M, Pan J, Chen E. Comparison of Avian Influenza Virus Contamination in the Environment Before and After Massive Poultry H5/H7 Vaccination in Zhejiang Province, China. Open Forum Infect Dis 2019; 6:ofz197. [PMID: 31198818 PMCID: PMC6546204 DOI: 10.1093/ofid/ofz197] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 04/20/2019] [Indexed: 12/25/2022] Open
Abstract
Background Information regarding comparison of the environmental prevalence of avian influenza virus (AIVs), before and after massive poultry vaccinations, is limited. Our study aimed to detect differences in the prevalence of AIVs type A and subtypes H5, H7, and H9 before and after the September 2017 massive poultry vaccination, across different sampling places and types. Methods We collected 55 130 environmental samples from 11 cities in Zhejiang Province (China) between March 2013 and December 2018. Multivariate logistic regression analyses were conducted to determine the prevalence of AIV type A and subtypes H5, H7, and H9 across different sampling places and types, before and after massive poultry vaccination. Results After the vaccination, contamination risk of AIV type A (adjusted odds ratio [aOR] = 1.08; 95% confidence interval [CI], 1.03–1.14) and subtype H9 (aOR = 1.58; 95% CI, 1.48–1.68) increased, and that of subtype H7 (aOR = 0.12; 95% CI, 0.10–0.14) decreased. Statistically significant decreased risk for H7 subtype contamination and increased risk for H9 subtype contamination were observed in backyard poultry flocks, live poultry markets, and slaughtering/processing plants. Swabs from poultry cages and slaughtering tables showed a statistically significant increased risk for H5 subtype contamination. The prevalence of H7 subtype decreased statistically significantly, whereas that of H9 subtype increased across the 5 sample types (poultry cages swabs, slaughtering table swabs, poultry feces, poultry drinking water, and poultry sewage). Conclusions Despite the sharp decrease in H7 subtype prevalence, reduction measures for AIV circulation are still imperative, given the high type A prevalence and the increase in H9 subtype contamination across different sampling places and types.
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Affiliation(s)
- Wei Cheng
- Zhejiang Provincial Centre for Disease Control and Prevention, Bin jiang District, Hangzhou, China
| | - Ka Chun Chong
- Division of Biostatistics, JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories
| | - Steven Yuk-Fai Lau
- Division of Biostatistics, JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories
| | - Xiaoxiao Wang
- Zhejiang Provincial Centre for Disease Control and Prevention, Bin jiang District, Hangzhou, China
| | - Zhao Yu
- Zhejiang Provincial Centre for Disease Control and Prevention, Bin jiang District, Hangzhou, China
| | - Shelan Liu
- Zhejiang Provincial Centre for Disease Control and Prevention, Bin jiang District, Hangzhou, China
| | - Maggie Wang
- Division of Biostatistics, JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories
| | - Jinren Pan
- Zhejiang Provincial Centre for Disease Control and Prevention, Bin jiang District, Hangzhou, China
| | - Enfu Chen
- Zhejiang Provincial Centre for Disease Control and Prevention, Bin jiang District, Hangzhou, China
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28
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Ma C, Cui S, Sun Y, Zhao J, Zhang D, Zhang L, Zhang Y, Pan Y, Wu S, Duan W, Zhang M, Yang P, Wang Q. Avian influenza A (H9N2) virus infections among poultry workers, swine workers, and the general population in Beijing, China, 2013-2016: A serological cohort study. Influenza Other Respir Viruses 2019; 13:415-425. [PMID: 30884184 PMCID: PMC6586185 DOI: 10.1111/irv.12641] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 02/21/2019] [Accepted: 02/23/2019] [Indexed: 12/25/2022] Open
Abstract
Background Few studies have reported on the seroprevalence of antibodies against avian influenza A (H9N2) virus and the incidence of these infections in the northern China and among swine workers. Methods We conducted a serological cohort study among people working with poultry or swine or the general population in Beijing, China. It comprised four cross‐sectional serological surveys in November 2013, April 2014, April 2015, and April 2016. Blood samples collected from the participants were tested for anti‐H9N2 antibodies using a hemagglutination‐inhibition (HI) assay. Multivariable Poisson regression model was then used to compare the person‐month incidence rates for H9N2 viral infections among the three groups, assessed by incidence rate ratio (IRR). Results In the four cross‐sectional surveys, the highest seroprevalence of anti‐H9N2 antibodies (HI titer ≥ 80) was recorded in the poultry workers (2.77%, 19/685) in April 2016, while the lowest was recorded in the general population (0.09%, 1/1135) in April 2015. The highest incidence density rate for H9N2 infections across the whole study period was recorded among the poultry workers (3.75/1000 person‐months), followed by the swine workers (1.94/1000 person‐months) and the general population (1.78/1000 person‐months). Multivariable analysis showed that the poultry workers were at higher risk (IRR: 2.42, 95% CI: 1.07‐5.48; P = 0.034) of contracting H9N2 virus than the general population. Conclusions Although the seroprevalence of H9N2 antibodies was low in Beijing, the poultry workers were at higher risk of contracting H9N2 viral infections than the general population. Closer monitoring and strengthened protection measures for poultry workers are warranted.
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Affiliation(s)
- Chunna Ma
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China
| | - Shujuan Cui
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China
| | - Ying Sun
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China
| | - Jiachen Zhao
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China
| | - Daitao Zhang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China
| | - Li Zhang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China
| | - Yi Zhang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China
| | - Yang Pan
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China.,School of Public Health, Capital Medical University, Beijing, China
| | - Shuangsheng Wu
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China
| | - Wei Duan
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China
| | - Man Zhang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China
| | - Peng Yang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China.,School of Public Health, Capital Medical University, Beijing, China
| | - Quanyi Wang
- Institute for Infectious Disease and Endemic Disease Control, Beijing Municipal Center for Disease Prevention and Control, Beijing, China.,Institute for Infectious Disease and Endemic Disease Control, Beijing Research Center for Preventive Medicine, Beijing, China
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29
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Nguyen GT, Rauw F, Steensels M, Ingrao F, Bonfante F, Davidson I, Lambrecht B. Study of the underlying mechanisms and consequences of pathogenicity differences between two in vitro selected G1-H9N2 clones originating from a single isolate. Vet Res 2019; 50:18. [PMID: 30823888 PMCID: PMC6397504 DOI: 10.1186/s13567-019-0635-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 02/20/2019] [Indexed: 01/10/2023] Open
Abstract
The G1-H9N2 avian influenza virus (AIV) has caused significant economic losses in the commercial poultry industry due to reduced egg production and increased mortality. The field observations have shown that H9N2 viruses circulate and naturally mix with other pathogens and these simultaneous infections can exacerbate disease. To avoid an incorrect virus characterization, due to co-infection, isolates were purified by in vitro plaque assays. Two plaque purified G1-H9N2 clones, selected on different cell types, named MDCK-and CEF-clone in regards to the cell culture used, were studied in vivo, revealing two different virulence phenotypes. Subsequently, the underlying mechanisms were studied. Specifically, the phenotypical outcome of SPF bird infection by the two clones resulted in completely different clinical outcomes. These differences in clinical outcome were used to study the factors behind this output in more detail. Further studies demonstrated that the more severe disease outcome associated with the MDCK-clone involves a strong induction of pro-inflammatory cytokines and a lack of type I interferon production, whereas the mild disease outcome associated with the CEF-clone is related to a greater antiviral cytokine response. The immunosuppressive effect of the MDCK-clone on splenocytes was further demonstrated via ChIFN-γ lack production after ex vivo mitogenic stimulation. Genome sequencing of the two clones identified only four amino acid differences including three in the HA sequence (HA-E198A, HA-R234L, HA-E502D-H9 numbering) and one in the NA sequence (NA-V33M). In the present study, valuable insights on the mechanisms responsible for AI pathogenicity and molecular mechanisms of H9N2 infections in chicken were obtained while highlighting the impact of the cells viruses are grown on their virulence.
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Affiliation(s)
- Giang Thu Nguyen
- Avian Virology and Immunology Service, National Reference Laboratory for Avian Influenza and Newcastle Disease Virus, Sciensano, Uccle, Brussels Belgium
| | - Fabienne Rauw
- Avian Virology and Immunology Service, National Reference Laboratory for Avian Influenza and Newcastle Disease Virus, Sciensano, Uccle, Brussels Belgium
| | - Mieke Steensels
- Avian Virology and Immunology Service, National Reference Laboratory for Avian Influenza and Newcastle Disease Virus, Sciensano, Uccle, Brussels Belgium
| | - Fiona Ingrao
- Avian Virology and Immunology Service, National Reference Laboratory for Avian Influenza and Newcastle Disease Virus, Sciensano, Uccle, Brussels Belgium
| | | | - Irit Davidson
- Division of Avian and Diseases, Kimron Veterinary Institute, Bet Dagan, Israel
| | - Bénédicte Lambrecht
- Avian Virology and Immunology Service, National Reference Laboratory for Avian Influenza and Newcastle Disease Virus, Sciensano, Uccle, Brussels Belgium
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30
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Zou S, Zhang Y, Li X, Bo H, Wei H, Dong L, Yang L, Dong J, Liu J, Shu Y, Wang D. Molecular characterization and receptor binding specificity of H9N2 avian influenza viruses based on poultry-related environmental surveillance in China between 2013 and 2016. Virology 2019; 529:135-143. [PMID: 30703577 DOI: 10.1016/j.virol.2019.01.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 12/25/2018] [Accepted: 01/02/2019] [Indexed: 12/25/2022]
Abstract
H9N2 avian influenza viruses (AIVs) have become panzootic and caused sporadic human cases since 1998. Based on the poultry-related environmental surveillance data in mainland China from 2013 to 2016, a total of 68 representative environment isolates were selected and further investigated systematically. Phylogenetic analysis indicated that Y280-like H9N2 viruses have been predominant during 2013-2016 and acquired multiple specific amino acid substitutions that might favor viral transmission from avian to mammalians. Additionally, the viruses have undergone dramatic evolution and reassortment, resulting in an increased genetic diversity or acting as the gene contributors to new avian viruses. Receptor-binding tests indicated that most of the H9N2 isolates bound to human-type receptor, making them easily cross the species barrier and infect human efficiently. Our results suggested that the H9N2 AIVs prevalent in poultry may pose severe public health threat.
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Affiliation(s)
- Shumei Zou
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, and Key Laboratory for Medical Virology, National Health and Family Planning Commission, Beijing 102206, People's Republic of China.
| | - Ye Zhang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, and Key Laboratory for Medical Virology, National Health and Family Planning Commission, Beijing 102206, People's Republic of China.
| | - Xiyan Li
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, and Key Laboratory for Medical Virology, National Health and Family Planning Commission, Beijing 102206, People's Republic of China.
| | - Hong Bo
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, and Key Laboratory for Medical Virology, National Health and Family Planning Commission, Beijing 102206, People's Republic of China.
| | - Hejiang Wei
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, and Key Laboratory for Medical Virology, National Health and Family Planning Commission, Beijing 102206, People's Republic of China.
| | - Libo Dong
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, and Key Laboratory for Medical Virology, National Health and Family Planning Commission, Beijing 102206, People's Republic of China.
| | - Lei Yang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, and Key Laboratory for Medical Virology, National Health and Family Planning Commission, Beijing 102206, People's Republic of China.
| | - Jie Dong
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, and Key Laboratory for Medical Virology, National Health and Family Planning Commission, Beijing 102206, People's Republic of China.
| | - Jia Liu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, and Key Laboratory for Medical Virology, National Health and Family Planning Commission, Beijing 102206, People's Republic of China.
| | - Yuelong Shu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, and Key Laboratory for Medical Virology, National Health and Family Planning Commission, Beijing 102206, People's Republic of China.
| | - Dayan Wang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, and Key Laboratory for Medical Virology, National Health and Family Planning Commission, Beijing 102206, People's Republic of China.
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31
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Zhang J, Wu H, Zhang Y, Cao M, Brisse M, Zhu W, Li R, Liu M, Cai M, Chen J, Chen J. Molecular evolutionary and antigenic characteristics of newly isolated H9N2 avian influenza viruses in Guangdong province, China. Arch Virol 2018; 164:607-612. [PMID: 30474753 DOI: 10.1007/s00705-018-4103-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 11/03/2018] [Indexed: 02/08/2023]
Abstract
Four new H9N2 avian influenza viruses (AIVs) were isolated from domestic birds in Guangdong between December 2015 and April 2016. Nucleotide sequence comparisons indicated that most of the internal genes of these four strains were highly similar to those of human H7N9 viruses. Amino acid substitutions and deletions found in the HA and NA proteins indicated that all four of these new isolates may have an enhanced ability to infect humans and other mammals. A cross-hemagglutinin-inhibition assay, conducted with two vaccine strains that are broadly used in China, suggested that antisera against vaccine candidates could not provide complete inhibition of the new isolates.
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Affiliation(s)
- Jipei Zhang
- School of Life Science and Engineering, Foshan University, Foshan, 528000, Guangdong, People's Republic of China
| | - Huiji Wu
- School of Life Science and Engineering, Foshan University, Foshan, 528000, Guangdong, People's Republic of China
| | - Yishan Zhang
- School of Life Science and Engineering, Foshan University, Foshan, 528000, Guangdong, People's Republic of China
| | - Mengrui Cao
- School of Life Science and Engineering, Foshan University, Foshan, 528000, Guangdong, People's Republic of China
| | - Morgan Brisse
- College of Veterinary Medicine, University of Minnesota, Twin Cites Campus, Saint Paul, MN, 55108, USA
| | - Wanjun Zhu
- School of Life Science and Engineering, Foshan University, Foshan, 528000, Guangdong, People's Republic of China.,College of Veterinary Medicine, University of Minnesota, Twin Cites Campus, Saint Paul, MN, 55108, USA
| | - Rongxu Li
- School of Life Science and Engineering, Foshan University, Foshan, 528000, Guangdong, People's Republic of China
| | - Minfang Liu
- School of Life Science and Engineering, Foshan University, Foshan, 528000, Guangdong, People's Republic of China
| | - Mingsheng Cai
- Department of Pathogenic Biology and Immunology, Sino-French Hoffmann Institute, School of Basic Medical Science, Guangzhou Medical University, Xinzao Town, Panyu, Guangzhou, 511436, Guangdong, People's Republic of China
| | - Jianhong Chen
- School of Life Science and Engineering, Foshan University, Foshan, 528000, Guangdong, People's Republic of China.
| | - Jidang Chen
- School of Life Science and Engineering, Foshan University, Foshan, 528000, Guangdong, People's Republic of China.
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32
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Xu C, Ye H, Qiu W, Lin H, Chen Y, Zhang H, Liao M. Phylogenetic classification of hemagglutinin gene of H9N2 avian influenza viruses isolated in China during 2012-2016 and evaluation of selected candidate vaccine strains. Poult Sci 2018; 97:3023-3030. [PMID: 29931183 DOI: 10.3382/ps/pey154] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 06/13/2018] [Indexed: 12/20/2022] Open
Abstract
H9N2 subtype avian influenza virus (AIV) was the highly contagious pathogen which has caused severe losses in the poultry industry throughout China in recent years. Using current epidemic viruses as vaccine was an effective way to prevent infection of H9N2 subtype AIV. In this study, a total of 23 H9N2 subtype AIV strains were isolated in 200 samples from 13 provinces of China during 2012-2016. The sequencing and phylogenetic analysis of the hemagglutinin gene sequence of the isolation strains showed that 22 isolation strains were clustered to h9.4.2.5 lineage, while only 1 belonged to h9.4.2.6. The data of cross-HI, neutralization and cross-immune protection shown that the A/chicken/Hunan/HN/2015 (HN) and A/chicken/Shandong/SD/2014 (SD) strains as vaccine could effectively protect present viruses infection compared with other strains. These results indicated that current epidemic viruses were mainly belong to h9.4.2.5 lineage and HN and SD strains as candidate vaccine strains were potentiality for the protection of present H9N2 subtype AIV infection.
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Affiliation(s)
- C Xu
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Veterinary Vaccine Innovation of the Ministry of Agriculture, China.,Key Laboratory of Zoonosis Prevention and Control of Guangzhou Province, China
| | - H Ye
- Guangzhou South China Biological Medicine Co., Ltd., Zengcheng, China
| | - W Qiu
- Guangzhou South China Biological Medicine Co., Ltd., Zengcheng, China
| | - H Lin
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Y Chen
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - H Zhang
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - M Liao
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Veterinary Vaccine Innovation of the Ministry of Agriculture, China.,Key Laboratory of Zoonosis Prevention and Control of Guangzhou Province, China
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33
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Chang HP, Peng L, Chen L, Jiang LF, Zhang ZJ, Xiong CL, Zhao GM, Chen Y, Jiang QW. Avian influenza viruses (AIVs) H9N2 are in the course of reassorting into novel AIVs. J Zhejiang Univ Sci B 2018; 19:409-414. [PMID: 29732752 DOI: 10.1631/jzus.b1700374] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In 2013, two episodes of influenza emerged in China and caused worldwide concern. A new H7N9 avian influenza virus (AIV) first appeared in China on February 19, 2013. By August 31, 2013, the virus had spread to ten provinces and two metropolitan cities. Of 134 patients with H7N9 influenza, 45 died. From then on, epidemics emerged sporadically in China and resulted in several victims. On November 30, 2013, a 73-year-old woman presented with an influenza-like illness. She developed multiple organ failure and died 9 d after the onset of disease. A novel reassortant AIV, H10N8, was isolated from a tracheal aspirate specimen that was obtained from the patient 7 d after onset. This case was the first human case of influenza A subtype H10N8. On 4 February, 2014, another death due to H10N8 avian influenza was reported in Jiangxi Province, China.
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Affiliation(s)
- Hui-Ping Chang
- Department of Life Sciences, Henan Institute of Education, Zhengzhou 450000, China
| | - Li Peng
- Shanghai Key Laboratory of Meteorology and Health, Shanghai 200032, China
| | - Liang Chen
- Department of Public Health Microbiology, School of Public Health, Fudan University, Shanghai 200032, China.,Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Lu-Fang Jiang
- Department of Public Health Microbiology, School of Public Health, Fudan University, Shanghai 200032, China.,Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Zhi-Jie Zhang
- Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China.,Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China
| | - Cheng-Long Xiong
- Department of Public Health Microbiology, School of Public Health, Fudan University, Shanghai 200032, China.,Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China
| | - Gen-Ming Zhao
- Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China.,Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China
| | - Yue Chen
- School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, K1G5Z3, Canada
| | - Qing-Wu Jiang
- Key Laboratory of Public Health Safety, Ministry of Education, Fudan University, Shanghai 200032, China.,Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China
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Wille M, Latorre-Margalef N, Tolf C, Halpin R, Wentworth D, Fouchier RAM, Raghwani J, Pybus OG, Olsen B, Waldenström J. Where do all the subtypes go? Temporal dynamics of H8-H12 influenza A viruses in waterfowl. Virus Evol 2018; 4:vey025. [PMID: 30151242 PMCID: PMC6101617 DOI: 10.1093/ve/vey025] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Influenza A virus (IAV) is ubiquitous in waterfowl. In the northern hemisphere IAV prevalence is highest during the autumn and coincides with a peak in viral subtype diversity. Although haemagglutinin subtypes H1-H12 are associated with waterfowl hosts, subtypes H8-H12 are detected very infrequently. To better understand the role of waterfowl in the maintenance of these rare subtypes, we sequenced H8-H12 viruses isolated from Mallards (Anas platyrhynchos) from 2002 to 2009. These rare viruses exhibited varying ecological and phylodynamic features. The Eurasian clades of H8 and H12 phylogenies were dominated by waterfowl sequences; mostly viruses sequenced in this study. H11, once believed to be a subtype that infected charadriiformes (shorebirds), exhibited patterns more typical of common virus subtypes. Finally, subtypes H9 and H10, which have maintained lineages in poultry, showed markedly different patterns: H10 was associated with all possible NA subtypes and this drove HA lineage diversity within years. Rare viruses belonging to subtypes H8-H12 were highly reassorted, indicating that these rare subtypes are part of the broader IAV pool. Our results suggest that waterfowl play a role in the maintenance of these rare subtypes, but we recommend additional sampling of non-traditional hosts to better understand the reservoirs of these rare viruses.
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Affiliation(s)
- Michelle Wille
- Center for Ecology and Evolution in Microbial Model Systems, Linnaeus University, SE-391 82 Kalmar, Sweden
| | - Neus Latorre-Margalef
- Center for Ecology and Evolution in Microbial Model Systems, Linnaeus University, SE-391 82 Kalmar, Sweden.,Department of Biology, Lund University, Ecology Building, 223 62 Lund, Sweden
| | - Conny Tolf
- Center for Ecology and Evolution in Microbial Model Systems, Linnaeus University, SE-391 82 Kalmar, Sweden
| | - Rebecca Halpin
- Department of Infectious Disease, J. Craig Venter Institute, Rockville, MD, USA
| | - David Wentworth
- Department of Infectious Disease, J. Craig Venter Institute, Rockville, MD, USA
| | - Ron A M Fouchier
- Department of Virology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Jayna Raghwani
- Department of Zoology, University of Oxford, Oxford OX1 3SY, UK
| | - Oliver G Pybus
- Department of Zoology, University of Oxford, Oxford OX1 3SY, UK
| | - Björn Olsen
- Department of Medical Biochemistry and Microbiology, Zoonosis Science Center, Uppsala University, Uppsala, Sweden
| | - Jonas Waldenström
- Center for Ecology and Evolution in Microbial Model Systems, Linnaeus University, SE-391 82 Kalmar, Sweden
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35
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Zhu R, Xu D, Yang X, Zhang J, Wang S, Shi H, Liu X. Genetic and biological characterization of H9N2 avian influenza viruses isolated in China from 2011 to 2014. PLoS One 2018; 13:e0199260. [PMID: 29969454 PMCID: PMC6029760 DOI: 10.1371/journal.pone.0199260] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 06/04/2018] [Indexed: 11/19/2022] Open
Abstract
The genotypes of the H9N2 avian influenza viruses have changed since 2013 when almost all H9N2 viruses circulating in chickens in China were genotype 57 (G57) with the fittest lineage of each gene. To characterize the H9N2 variant viruses from 2011 to 2014, 28 H9N2 influenza viruses were isolated from live poultry markets in China from 2011–2014 and were analyzed by genetic and biological characterization. Our findings showed that 16 residues that changed antigenicity, two potential N-linked glycosylation sites, and one amino acid in the receptor binding site of the HA protein changed significantly from 2011–2014. Moreover, the HA and NA genes in the phylogenetic tree were mainly clustered into two independent branches, A and B, based on the year of isolation. H9N2 virus internal genes were related to those from the human-infected avian influenza viruses H5N1, H7N9, and H10N8. In particular, the NS gene in the phylogenetic tree revealed genetic divergence of the virus gene into three branches labeled A, B, and C, which were related to the H9N2, H10N8, and H7N9 viruses, respectively. Additionally, the isolates also showed varying levels of infection and airborne transmission. These results indicated that the H9N2 virus had undergone an adaptive evolution and variation from 2011–2014.
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MESH Headings
- Amino Acid Sequence
- Animals
- Antigens, Viral/chemistry
- Antigens, Viral/genetics
- Antigens, Viral/immunology
- Chickens
- China/epidemiology
- Evolution, Molecular
- Gene Expression
- Glycosylation
- Hemagglutinin Glycoproteins, Influenza Virus/chemistry
- Hemagglutinin Glycoproteins, Influenza Virus/genetics
- Hemagglutinin Glycoproteins, Influenza Virus/immunology
- Humans
- Influenza A Virus, H10N8 Subtype/classification
- Influenza A Virus, H10N8 Subtype/genetics
- Influenza A Virus, H10N8 Subtype/immunology
- Influenza A Virus, H5N1 Subtype/classification
- Influenza A Virus, H5N1 Subtype/genetics
- Influenza A Virus, H5N1 Subtype/immunology
- Influenza A Virus, H7N9 Subtype/classification
- Influenza A Virus, H7N9 Subtype/genetics
- Influenza A Virus, H7N9 Subtype/immunology
- Influenza A Virus, H9N2 Subtype/classification
- Influenza A Virus, H9N2 Subtype/genetics
- Influenza A Virus, H9N2 Subtype/immunology
- Influenza in Birds/epidemiology
- Influenza in Birds/immunology
- Influenza in Birds/virology
- Influenza, Human/epidemiology
- Influenza, Human/immunology
- Influenza, Human/virology
- Neuraminidase/chemistry
- Neuraminidase/genetics
- Neuraminidase/immunology
- Phylogeny
- Polymorphism, Genetic
- Poultry Diseases/epidemiology
- Poultry Diseases/immunology
- Poultry Diseases/virology
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Affiliation(s)
- Rui Zhu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, PR China
- Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, PR China
| | - Danwen Xu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, PR China
- Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, PR China
| | - Xueqin Yang
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, PR China
- Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, PR China
| | - Jianjun Zhang
- Sinopharm Yangzhou VAC Biological Engineering Co., Ltd., Yangzhou, Jiangsu, PR China
| | - Shifeng Wang
- Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, Gainesville, Florida, United States of America
| | - Huoying Shi
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, PR China
- Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, PR China
- * E-mail:
| | - Xiufan Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, PR China
- Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, PR China
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36
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Wu Y, Lin J, Yang S, Xie Y, Wang M, Chen X, Zhu Y, Luo L, Shi W. The molecular characteristics of avian influenza viruses (H9N2) derived from air samples in live poultry markets. INFECTION GENETICS AND EVOLUTION 2018; 60:191-196. [DOI: 10.1016/j.meegid.2018.01.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Revised: 12/03/2017] [Accepted: 01/09/2018] [Indexed: 12/24/2022]
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Hassan MM, Hoque MA, Ujvari B, Klaassen M. Live bird markets in Bangladesh as a potentially important source for Avian Influenza Virus transmission. Prev Vet Med 2018; 156:22-27. [PMID: 29891142 DOI: 10.1016/j.prevetmed.2018.05.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 05/02/2018] [Accepted: 05/02/2018] [Indexed: 10/17/2022]
Abstract
Live bird markets (LBM) are important for trading poultry in many developing countries where they are being considered hotspots of Avian Influenza Virus (AIV) prevalence and contamination. An active surveillance for Avian Influenza Virus (AIV) was conducted on four species of LBM birds (chickens, ducks, quails and pigeons) from 10 of the largest LBM in Chittagong, Bangladesh, and two species of peri-domestic wild birds (house crow and Asian pied starling) in their direct vicinity from November 2012 until September 2016. Our aim was to identify the scale and annual pattern of AIV circulation in both the LBM birds and the two per-domestic wild bird species living in close proximity of the LBM. In the latter two species, the annual pattern in AIV antibody prevalence was additionally investigated. A total of 4770 LBM birds and 1119 peri-domestic wild birds were sampled. We used rt-PCR for detection of the AIV M-gene and AIV subtypes H5, H7 and H9 from swab samples. We used c-ELISA for AIV antibody detection from serum samples of peri-domestic wild birds. Average AIV prevalence among the four LBM species varied between 16 and 28%, whereas no AIV was detected in peri-domestic wild birds by rt-PCR. In all LBM species we found significantly higher AIV prevalence in winter compared to summer. A similar pattern was found in AIV antibody prevalence in peri-domestic wild birds feeding in the direct vicinity of LBM. For the subtypes of AIV investigated, we found a significantly higher proportion of AIV H5 in LBM chickens and H9 in LBM ducks. No H7 was detected in any of the investigated samples. We conclude that AIV and notably AIV H5 and H9 were circulating in the investigated LBM of Bangladesh with clear seasonality that matched the prevalence of AIV antibodies of peri-domestic wild birds. These patterns show great resemblance to the annual outbreak patterns in Bangladeshi poultry industry. Our data suggest considerable exchange of AIV within and among the four LBM bird species and peri-domestic wild birds, which likely contributes to the maintenance of the AIV problems in Bangladesh. Increasing biosecurity and notably reducing the direct and indirect mixing of various domestic bird species and peri-domestic wild birds and developing all-in-all-out selling systems with regular use of disinfectant are likely to reduce the risk of transmission and spread of AIV, including HPAI.
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Affiliation(s)
- Mohammad Mahmudul Hassan
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Geelong, VIC, Australia; Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Sciences University, Zakir Hossain Road, Khulshi, Chittagong, 4225, Bangladesh.
| | - Md Ahasanul Hoque
- Faculty of Veterinary Medicine, Chittagong Veterinary and Animal Sciences University, Zakir Hossain Road, Khulshi, Chittagong, 4225, Bangladesh.
| | - Beata Ujvari
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Geelong, VIC, Australia.
| | - Marcel Klaassen
- Centre for Integrative Ecology, School of Life and Environmental Sciences, Deakin University, Geelong, VIC, Australia.
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Lee DW, Whittaker GR. Use of AAScatterPlot tool for monitoring the evolution of the hemagglutinin cleavage site in H9 avian influenza viruses. Bioinformatics 2018; 33:2431-2435. [PMID: 28383669 DOI: 10.1093/bioinformatics/btx203] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 04/04/2017] [Indexed: 02/03/2023] Open
Abstract
Motivation Viruses rapidly evolve due to their error-prone genome replication, and identifying which mutations are selected for during evolution is critical for virus surveillance efforts. Here we introduce a scatter plot tool (AAScatterPlot) that easily shows the selection and avoidance of certain protein mutations based on biochemical properties. We demonstrate its utility for monitoring the evolution of H9 avian influenza viruses from China between 2005 and 2015, particularly at the hemagglutinin (HA) proteolytic cleavage site (PCS) that can affect virus activation and pathogenicity. Results Given genome sequences, the AAScatterPlot tool compacts into a single plot, information about the hydropathy index, Van der Waals volume, chemical property and occurrence frequency of amino acid residues. The tool also shows the range of residues that could arise from a single point mutation in the genome, which can then be compared against the observed residues to identify mutation constraints. Through this approach, we found that the 2nd position towards the N-terminus side of the HA PCS (P2 position) avoided hydrophobic residues, whereas the P3 position avoided hydrophilic residues. Availability and Implementation AAScatterPlot is available at https://github.com/WhittakerLab/AAScatterPlot. Contact gary.whittaker@cornell.edu. Supplementary information Supplementary data are available at Bioinformatics online.
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Affiliation(s)
| | - Gary R Whittaker
- Department of Microbiology and Immunology, Cornell University, Ithaca, NY, USA
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Genetic evolution of influenza H9N2 viruses isolated from various hosts in China from 1994 to 2013. Emerg Microbes Infect 2017; 6:e106. [PMID: 29184157 PMCID: PMC5717095 DOI: 10.1038/emi.2017.94] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Revised: 09/18/2017] [Accepted: 10/08/2017] [Indexed: 12/29/2022]
Abstract
Influenza H9N2 subtype viruses and their reassortants (such as H7N9) are posing increasing threats to birds and humans in China. During 2009–2013, multiple novel subtype viruses with H9N2 original genes emerged in China. Yet, the genetic evolution of H9N2 viruses in various host organisms in China has not been systematically investigated since 2009. In the present study, we performed large-scale sequence analysis of H9N2 viral genomes from public databases, representing the spectrum of viruses isolated from birds, mammals and humans in China from 1994 to 2013, and updated the clade classification for each segment. We identified 117 distinct genotypes in 730 H9N2 viruses. We analyzed the sequences of all eight segments in each virus and found three important time points: the years 2000, 2006 and 2010. In the periods divided by these years, genotypic diversity, geographic distribution and host range changed considerably. Genotypic diversity fluctuated greatly in 2000 and 2006. Since 2010, a single genotype became predominant in poultry throughout China, and the eastern coastal region became the newly identified epidemic center. Throughout their 20-year prevalence in China, H9N2 influenza viruses have emerged and adapted from aquatic birds to chickens. The minor avian species and wild birds exacerbated H9N2 genotypes by providing diversified genes, and chickens were the most prevalent vector in which the viruses evolved and expanded their prevalence. It is the necessity for surveillance and disease control on live-bird markets, poultry farms and wild-bird habitats in China.
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40
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Gu M, Xu L, Wang X, Liu X. Current situation of H9N2 subtype avian influenza in China. Vet Res 2017; 48:49. [PMID: 28915920 PMCID: PMC5603032 DOI: 10.1186/s13567-017-0453-2] [Citation(s) in RCA: 121] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 07/18/2017] [Indexed: 11/12/2022] Open
Abstract
In China, H9N2 subtype avian influenza outbreak is firstly reported in Guangdong province in 1992. Subsequently, the disease spreads into vast majority regions nationwide and has currently become endemic there. Over vicennial genetic evolution, the viral pathogenicity and transmissibility have showed an increasing trend as year goes by, posing serious threat to poultry industry. In addition, H9N2 has demonstrated significance to public health as it could not only directly infect mankind, but also donate partial or even whole cassette of internal genes to generate novel human-lethal reassortants like H5N1, H7N9, H10N8 and H5N6 viruses. In this review, we mainly focused on the epidemiological dynamics, biological characteristics, molecular phylogeny and vaccine strategy of H9N2 subtype avian influenza virus in China to present an overview of the situation of H9N2 in China.
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Affiliation(s)
- Min Gu
- College of Veterinary Medicine, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, China.,Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, 225009, Jiangsu, China
| | - Lijun Xu
- College of Veterinary Medicine, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, China.,Yangzhou Entry-Exit Inspection and Quarantine Bureau, Yangzhou, 225009, Jiangsu, China
| | - Xiaoquan Wang
- College of Veterinary Medicine, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu, China.,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, China.,Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, 225009, Jiangsu, China
| | - Xiufan Liu
- College of Veterinary Medicine, Yangzhou University, 48 East Wenhui Road, Yangzhou, 225009, Jiangsu, China. .,Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, Jiangsu, China. .,Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, 225009, Jiangsu, China.
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41
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Liu M, Lu Q, Zhang S, Feng X, Hossain MS. Temporal and spatial characteristics of highly pathogenic avian influenza outbreaks in China during 2004 to 2015. Poult Sci 2017; 96:3113-3121. [PMID: 28453859 DOI: 10.3382/ps/pex097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Indexed: 11/20/2022] Open
Abstract
Identifying the temporal and spatial characteristics of highly pathogenic avian influenza (HPAI) outbreaks is very important for developing effective and appropriate countermeasures against HPAI and promoting sustainable development in the poultry industry. This study aimed to analyze four aspects of the temporal and spatial characteristics of HPAI outbreaks in China, including the frequency of HPAI outbreaks, numbers of dead animals (died or culled), types of HPAI viruses, and species of infected animals. Temporal characteristics showed that the frequency of HPAI outbreaks decreased and then increased, with some years deviating from the main trend in 2004 to 2010 and 2011 to 2015, while the largest number of dead animals due to HPAI outbreaks was in 2005. During 2004 to 2015, HPAI H5N1 was the major type of HPAI virus, and chickens had the greatest risk of being infected with HPAI, followed by ducks and geese. The HPAI outbreaks had obvious seasonal effects clustered in January to February, June, and November. Spatial characteristics revealed that outbreaks were more frequent in Xinjiang, Hubei, and Guangdong but caused a larger number of dead animals in Liaoning and Shanxi. HPAI H5N1 appeared in 25 provinces, while HPAI H5N2 was mainly localized in Hebei and Jiangsu, and HPAI H5N6 occurred in Heilongjiang, Jiangsu, Hunan, and Guangdong. HPAI viruses were most frequently detected in chickens and wild birds in northern China, while the majority of HPAI infections were identified in chickens, ducks, and geese in southern China. Regionally, HPAI outbreaks were most frequent in the western region but resulted in larger number of animals dying or being culled in the eastern region. These findings could provide a new understanding of the distributional characteristics of HPAI outbreaks and offer prospects for better prevention and control strategies.
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Affiliation(s)
- Mingyue Liu
- College of Economics and Management, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi, China
| | - Qian Lu
- College of Economics and Management, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi, China.
| | - Shuxia Zhang
- College of Veterinary Medicine, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi, China
| | - Xiaolong Feng
- College of Economics and Management, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi, China
| | - Md Shakhawat Hossain
- College of Economics and Management, Northwest Agriculture and Forestry University, Yangling 712100, Shaanxi, China
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Liu YF, Lai HZ, Li L, Liu YP, Zhang WY, Gao R, Huang WK, Luo QF, Gao Y, Luo Q, Xie XY, Xu JH, Chen RA. Endemic Variation of H9N2 Avian Influenza Virus in China. Avian Dis 2017; 60:817-825. [PMID: 27902899 DOI: 10.1637/11452-061616-reg] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Forty-two H9N2 subtype AIV strains were isolated from vaccinated commercial chickens in China from 2012 to 2015. Their HA genes had nucleotide sequence homology from 86.7% to 99.7%, and similarity to the classic vaccine strain was 88.6%-92.6%. A comparison was carried out with published HA genes (410 H9 strains) and whole genomes (306 strains) isolated in China during 2012-2015. Interestingly, 99.1% (448/452) of Chinese H9N2 AIV belonged to lineage h9.4.2, and 98.5% (445/452) of the viruses belonged to h9.4.2.5. Meanwhile, 99.6% (443/445) of lineage 9.4.2.5 viruses had PSRSSR↓GLF instead of PARSSR↓GLF motifs in the HA cleavage sites; 98.2% (444/452) of HA genes showed human receptor binding associated mutation Q226L. A total of 96.8% (337/348) of the viruses had three amino-acid deletions at 63-65 in the NA stalk, associated with enhanced virulence in chickens and mice; 97.1% (338/348) of M2 proteins had the S31N mutation associated with adamantane resistance in humans. Two H9 viruses isolated in this study were highly homologous to the human-origin H9N2 virus reported in 2013. The isolates were divided into four different genotypes (U, S, V, and W). Genotype S was the major one, accounting for 94.8% (330/348). Genotypes V and W were new reassortment genotypes, with genotype W recombined with the PB2 gene originating from the new wild waterfowl-like lineage. According to the cross-HI antibody titer data, HA gene evolution, and isolation history, the isolates were divided into A, B, and C antigenic groups successively. All the antigenic group viruses were found to circulate throughout China. This study emphasizes the importance of updated vaccine and strengthened veterinary biosecurity on poultry farms and trade markets.
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Affiliation(s)
- Yu-Fu Liu
- A College of Veterinary Medicine, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong Province, 510642, China
| | - Han-Zhang Lai
- B Key Laboratory of Biotechnology and Bioproducts Development for Animal Epidemic Prevention, Ministry of Agriculture, P. R. China, Guangdong Wens Dahuanong Biotechnology Co., Ltd., No. 6 Dongdi North Road, Xincheng Town, Xinxing County, Yunfu City, 527400, China.,C Guangdong Enterprise Key Laboratory of Biotechnology R&D of Veterinary Biological Products, Zhaoqing Dahuanong Biological Medicine Co., Ltd., Zhaoqing High-Tech Development Zone, Zhaoqing, Guangdong Province 526238, China
| | - Lin Li
- B Key Laboratory of Biotechnology and Bioproducts Development for Animal Epidemic Prevention, Ministry of Agriculture, P. R. China, Guangdong Wens Dahuanong Biotechnology Co., Ltd., No. 6 Dongdi North Road, Xincheng Town, Xinxing County, Yunfu City, 527400, China
| | - Yu-Peng Liu
- B Key Laboratory of Biotechnology and Bioproducts Development for Animal Epidemic Prevention, Ministry of Agriculture, P. R. China, Guangdong Wens Dahuanong Biotechnology Co., Ltd., No. 6 Dongdi North Road, Xincheng Town, Xinxing County, Yunfu City, 527400, China.,C Guangdong Enterprise Key Laboratory of Biotechnology R&D of Veterinary Biological Products, Zhaoqing Dahuanong Biological Medicine Co., Ltd., Zhaoqing High-Tech Development Zone, Zhaoqing, Guangdong Province 526238, China
| | - Wen-Yan Zhang
- B Key Laboratory of Biotechnology and Bioproducts Development for Animal Epidemic Prevention, Ministry of Agriculture, P. R. China, Guangdong Wens Dahuanong Biotechnology Co., Ltd., No. 6 Dongdi North Road, Xincheng Town, Xinxing County, Yunfu City, 527400, China
| | - Ren Gao
- B Key Laboratory of Biotechnology and Bioproducts Development for Animal Epidemic Prevention, Ministry of Agriculture, P. R. China, Guangdong Wens Dahuanong Biotechnology Co., Ltd., No. 6 Dongdi North Road, Xincheng Town, Xinxing County, Yunfu City, 527400, China
| | - Wen-Ke Huang
- B Key Laboratory of Biotechnology and Bioproducts Development for Animal Epidemic Prevention, Ministry of Agriculture, P. R. China, Guangdong Wens Dahuanong Biotechnology Co., Ltd., No. 6 Dongdi North Road, Xincheng Town, Xinxing County, Yunfu City, 527400, China
| | - Qin-Fang Luo
- B Key Laboratory of Biotechnology and Bioproducts Development for Animal Epidemic Prevention, Ministry of Agriculture, P. R. China, Guangdong Wens Dahuanong Biotechnology Co., Ltd., No. 6 Dongdi North Road, Xincheng Town, Xinxing County, Yunfu City, 527400, China
| | - Yan Gao
- B Key Laboratory of Biotechnology and Bioproducts Development for Animal Epidemic Prevention, Ministry of Agriculture, P. R. China, Guangdong Wens Dahuanong Biotechnology Co., Ltd., No. 6 Dongdi North Road, Xincheng Town, Xinxing County, Yunfu City, 527400, China
| | - Qiong Luo
- B Key Laboratory of Biotechnology and Bioproducts Development for Animal Epidemic Prevention, Ministry of Agriculture, P. R. China, Guangdong Wens Dahuanong Biotechnology Co., Ltd., No. 6 Dongdi North Road, Xincheng Town, Xinxing County, Yunfu City, 527400, China
| | - Xiao-Yu Xie
- B Key Laboratory of Biotechnology and Bioproducts Development for Animal Epidemic Prevention, Ministry of Agriculture, P. R. China, Guangdong Wens Dahuanong Biotechnology Co., Ltd., No. 6 Dongdi North Road, Xincheng Town, Xinxing County, Yunfu City, 527400, China
| | - Jia-Hua Xu
- B Key Laboratory of Biotechnology and Bioproducts Development for Animal Epidemic Prevention, Ministry of Agriculture, P. R. China, Guangdong Wens Dahuanong Biotechnology Co., Ltd., No. 6 Dongdi North Road, Xincheng Town, Xinxing County, Yunfu City, 527400, China.,C Guangdong Enterprise Key Laboratory of Biotechnology R&D of Veterinary Biological Products, Zhaoqing Dahuanong Biological Medicine Co., Ltd., Zhaoqing High-Tech Development Zone, Zhaoqing, Guangdong Province 526238, China
| | - Rui-Ai Chen
- A College of Veterinary Medicine, South China Agricultural University, 483 Wushan Street, Tianhe District, Guangzhou, Guangdong Province, 510642, China
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Chen S, Zhu Y, Yang D, Yang Y, Shi S, Qin T, Peng D, Liu X. Efficacy of Live-Attenuated H9N2 Influenza Vaccine Candidates Containing NS1 Truncations against H9N2 Avian Influenza Viruses. Front Microbiol 2017; 8:1086. [PMID: 28659900 PMCID: PMC5469905 DOI: 10.3389/fmicb.2017.01086] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 05/30/2017] [Indexed: 01/09/2023] Open
Abstract
H9N2 avian influenza virus is a zoonotic agent with a broad host range that can contribute genetic information to H5 or H7N9 subtype viruses, which are significant threats to both humans and birds. Thus, there is a great need for a vaccine to control H9N2 avian influenza. Three mutant viruses of an H9N2 virus A/chicken/Taixing/10/2010 (rTX-NS1-73, rTX-NS1-100, and rTX-NS1-128) were constructed with different NS1 gene truncations and confirmed by western blot analysis. The genetic stability, pathogenicity, transmissibility, and host immune responses toward these mutants were evaluated. The mutant virus rTX-NS1-128 exhibited the most attenuated phenotype and lost transmissibility. The expression levels of interleukin 12 in the nasal and tracheal tissues from chickens immunized with rTX-NS1-128 were significantly upregulated on day 3 post-immunization and the IgA and IgG antibody levels were significantly increased on days 7, 14, and 21 post-immunization when compared to chickens that received an inactivated vaccine. rTX-NS1-128 also protected chickens from challenge by homologous and heterologous H9N2 avian influenza viruses. The results indicate that rTX-NS1-128 can be used as a potential live-attenuated vaccine against H9N2 avian influenza.
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Affiliation(s)
- Sujuan Chen
- College of Veterinary Medicine, Yangzhou UniversityYangzhou, China.,Jiangsu Research Center of Engineering and Technology for Prevention and Control of Poultry DiseaseYangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and ZoonosesYangzhou, China
| | - Yinbiao Zhu
- College of Veterinary Medicine, Yangzhou UniversityYangzhou, China.,Jiangsu Research Center of Engineering and Technology for Prevention and Control of Poultry DiseaseYangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and ZoonosesYangzhou, China.,Yangzhou Vac Biological Engineering Co., Ltd.Yangzhou, China
| | - Da Yang
- College of Veterinary Medicine, Yangzhou UniversityYangzhou, China.,Jiangsu Research Center of Engineering and Technology for Prevention and Control of Poultry DiseaseYangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and ZoonosesYangzhou, China
| | - Yang Yang
- College of Veterinary Medicine, Yangzhou UniversityYangzhou, China.,Jiangsu Research Center of Engineering and Technology for Prevention and Control of Poultry DiseaseYangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and ZoonosesYangzhou, China
| | - Shaohua Shi
- College of Veterinary Medicine, Yangzhou UniversityYangzhou, China.,Jiangsu Research Center of Engineering and Technology for Prevention and Control of Poultry DiseaseYangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and ZoonosesYangzhou, China
| | - Tao Qin
- College of Veterinary Medicine, Yangzhou UniversityYangzhou, China.,Jiangsu Research Center of Engineering and Technology for Prevention and Control of Poultry DiseaseYangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and ZoonosesYangzhou, China
| | - Daxin Peng
- College of Veterinary Medicine, Yangzhou UniversityYangzhou, China.,Jiangsu Research Center of Engineering and Technology for Prevention and Control of Poultry DiseaseYangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and ZoonosesYangzhou, China
| | - Xiufan Liu
- College of Veterinary Medicine, Yangzhou UniversityYangzhou, China.,Jiangsu Research Center of Engineering and Technology for Prevention and Control of Poultry DiseaseYangzhou, China.,Jiangsu Co-innovation Center for the Prevention and Control of Important Animal Infectious Disease and ZoonosesYangzhou, China
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Li X, Tian B, Jianfang Z, Yongkun C, Xiaodan L, Wenfei Z, Yan L, Jing T, Junfeng G, Tao C, Rongbao G, Dayan W, Shu Y. A comprehensive retrospective study of the seroprevalence of H9N2 avian influenza viruses in occupationally exposed populations in China. PLoS One 2017; 12:e0178328. [PMID: 28575073 PMCID: PMC5456037 DOI: 10.1371/journal.pone.0178328] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 05/11/2017] [Indexed: 01/08/2023] Open
Abstract
The H9N2 avian influenza virus circulates worldwide, predominantly in poultry. Its increasing infectivity and adaptation in poultry and mammals have enhanced the possibility of human infection. However, H9N2 human cases are difficult to detect due to their mild clinical symptoms. Serological study is valuable for risk assessment. A total of 15,700 serum samples were collected from occupationally exposed populations in 22 provinces of China and tested using hemagglutination inhibition (HI) and microneutralization (MN) assays. The sera positive rate of A/Guangzhou/333/99 (G9) was significantly higher than that of A/quail/Hong Kong/G1/97 (G1) (p<0.0001). The seroprevalences of H9N2 were significantly higher in live poultry market workers, large-scale poultry farmers and backyard farmers than in poultry slaughtering factory workers and wild bird habitant workers. The seroprevalences of A/Guangzhou/333/99 (G9) (3.42%) and A/quail/Hong Kong/G1/97 (G1) (1.37%) in Southern China were significantly higher than those in Northern China (p<0.001). The seroprevalence was highest in the elderly, followed by adults and then youths. Our results indicate that subclinical human infection with H9N2 avian influenza virus is widely distributed in China. Longer poultry exposure might contribute to the higher seroprevalence in the elderly group. The higher seroprevalence observed in Southern China than in Northern China might be caused by a higher poultry density.
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Affiliation(s)
- Xin Li
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Bai Tian
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Zhou Jianfang
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Chen Yongkun
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Li Xiaodan
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Zhu Wenfei
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Li Yan
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Tang Jing
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Guo Junfeng
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Chen Tao
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Gao Rongbao
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Wang Dayan
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
| | - Yuelong Shu
- National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Key Laboratory for Medical Virology, Ministry of Health, Beijing, People’s Republic of China
- * E-mail:
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45
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Kang N, Chen M, Bi FY, Chen MM, Tan Y. First Positive Detection of H9 Subtype of Avian Influenza Virus Nucleic Acid in Aerosol Samples from Live Poultry Markets in Guangxi, South of China. Chin Med J (Engl) 2017; 129:1371-3. [PMID: 27231177 PMCID: PMC4894050 DOI: 10.4103/0366-6999.182824] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Affiliation(s)
- Ning Kang
- Institute of Acute Infectious Diseases Control and Prevention, Guangxi Zhuang Autonomous Region for Disease Prevention and Control, Nanning, Guangxi 530028, China
| | - Min Chen
- Institute of Acute Infectious Diseases Control and Prevention, Guangxi Zhuang Autonomous Region for Disease Prevention and Control, Nanning, Guangxi 530028, China
| | - Fu-Yin Bi
- Institute of Acute Infectious Diseases Control and Prevention, Guangxi Zhuang Autonomous Region for Disease Prevention and Control, Nanning, Guangxi 530028, China
| | - Min-Mei Chen
- Institute of Acute Infectious Diseases Control and Prevention, Guangxi Zhuang Autonomous Region for Disease Prevention and Control, Nanning, Guangxi 530028, China
| | - Yi Tan
- Institute of Acute Infectious Diseases Control and Prevention, Guangxi Zhuang Autonomous Region for Disease Prevention and Control, Nanning, Guangxi 530028, China
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Bahl J, Pham TT, Hill NJ, Hussein ITM, Ma EJ, Easterday BC, Halpin RA, Stockwell TB, Wentworth DE, Kayali G, Krauss S, Schultz-Cherry S, Webster RG, Webby RJ, Swartz MD, Smith GJD, Runstadler JA. Ecosystem Interactions Underlie the Spread of Avian Influenza A Viruses with Pandemic Potential. PLoS Pathog 2016; 12:e1005620. [PMID: 27166585 PMCID: PMC4864295 DOI: 10.1371/journal.ppat.1005620] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 04/18/2016] [Indexed: 12/21/2022] Open
Abstract
Despite evidence for avian influenza A virus (AIV) transmission between wild and domestic ecosystems, the roles of bird migration and poultry trade in the spread of viruses remain enigmatic. In this study, we integrate ecosystem interactions into a phylogeographic model to assess the contribution of wild and domestic hosts to AIV distribution and persistence. Analysis of globally sampled AIV datasets shows frequent two-way transmission between wild and domestic ecosystems. In general, viral flow from domestic to wild bird populations was restricted to within a geographic region. In contrast, spillover from wild to domestic populations occurred both within and between regions. Wild birds mediated long-distance dispersal at intercontinental scales whereas viral spread among poultry populations was a major driver of regional spread. Viral spread between poultry flocks frequently originated from persistent lineages circulating in regions of intensive poultry production. Our analysis of long-term surveillance data demonstrates that meaningful insights can be inferred from integrating ecosystem into phylogeographic reconstructions that may be consequential for pandemic preparedness and livestock protection.
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Affiliation(s)
- Justin Bahl
- Center for Infectious Diseases, The University of Texas School of Public Health, Houston, Texas, United States of America
- Program in Emerging Infectious Diseases, Duke-National University of Singapore Graduate Medical School, Singapore, Singapore
| | - Truc T. Pham
- Center for Infectious Diseases, The University of Texas School of Public Health, Houston, Texas, United States of America
| | - Nichola J. Hill
- Division of Comparative Medicine, Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Islam T. M. Hussein
- Division of Comparative Medicine, Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Eric J. Ma
- Division of Comparative Medicine, Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Bernard C. Easterday
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Rebecca A. Halpin
- J. Craig Venter Institute, Rockville, Maryland, United States of America
| | | | - David E. Wentworth
- J. Craig Venter Institute, Rockville, Maryland, United States of America
| | - Ghazi Kayali
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee, United States of America
| | - Scott Krauss
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee, United States of America
| | - Stacey Schultz-Cherry
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee, United States of America
| | - Robert G. Webster
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee, United States of America
| | - Richard J. Webby
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee, United States of America
| | - Michael D. Swartz
- Center for Infectious Diseases, The University of Texas School of Public Health, Houston, Texas, United States of America
| | - Gavin J. D. Smith
- Program in Emerging Infectious Diseases, Duke-National University of Singapore Graduate Medical School, Singapore, Singapore
- Duke Global Health Institute, Duke University, Durham, North Carolina, United States of America
| | - Jonathan A. Runstadler
- Division of Comparative Medicine, Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
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Yang J, Dai X, Chen H, Teng Q, Li X, Rong G, Yan L, Liu Q, Li Z. Development of blocking ELISA for detection of antibodies against H9N2 avian influenza viruses. J Virol Methods 2016; 229:40-7. [DOI: 10.1016/j.jviromet.2015.12.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 12/10/2015] [Accepted: 12/19/2015] [Indexed: 12/09/2022]
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48
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Wei YR, Yang XY, Li YG, Wei J, Ma WG, Ren ZG, Guo HL, Wang TC, Mi XY, Adili G, Miao SK, Shaha A, Gao YW, Huang J, Xia XZ. Serological survey of avian influenza virus infection in non-avian wildlife in Xinjiang, China. Arch Virol 2016; 161:867-72. [DOI: 10.1007/s00705-015-2724-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 12/05/2015] [Indexed: 10/22/2022]
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49
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Phylogenetic Analysis of Hemagglutinin Genes of H9N2 Avian Influenza Viruses Isolated from Chickens in Shandong, China, between 1998 and 2013. BIOMED RESEARCH INTERNATIONAL 2015; 2015:267520. [PMID: 26609523 PMCID: PMC4644933 DOI: 10.1155/2015/267520] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 08/31/2015] [Indexed: 01/07/2023]
Abstract
Since H9N2 avian influenza virus (AIV) was first isolated in Guangdong province of China, the virus has been circulating in chicken flocks in mainland China. However, a systematic phylogenetic analysis of H9N2 AIV from chickens in Shandong of China has not been conducted. Based on hemagglutinin (HA) gene sequences of H9N2 AIVs isolated from chickens in Shandong of China between 1998 and 2013, genetic evolution of 35 HA gene sequences was systematically analyzed in this study. Our findings showed that the majority of H9N2 AIVs (21 out of 35) belonged to the lineage h9.4.2.5. Most of isolates (33 out of 35) had a PSRSSR↓GLF motif in HA cleavage site. Importantly, 29 out of these 35 isolates had an amino acid exchange (Q226L) in the receptor-binding site. The substitution showed that H9N2 AIVs had the potential affinity to bind to human-like receptor. The currently prevalent H9N2 AIVs in Shandong belonged to the lineage h9.4.2.5 which are different from the vaccine strain SS/94 clade h9.4.2.3. Therefore, the long-term surveillance of H9N2 AIVs is of significance to combat the possible H9N2 AIV outbreaks.
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50
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Su W, Wang C, Luo J, Zhao Y, Wu Y, Chen L, Zhao N, Li M, Xing C, Liu H, Zhang H, Chang YF, Li T, Ding H, Wan X, He H. Testing the Effect of Internal Genes Derived from a Wild-Bird-Origin H9N2 Influenza A Virus on the Pathogenicity of an A/H7N9 Virus. Cell Rep 2015; 12:1831-41. [PMID: 26344762 DOI: 10.1016/j.celrep.2015.08.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 06/24/2015] [Accepted: 08/07/2015] [Indexed: 01/11/2023] Open
Abstract
Since 2013, avian influenza A(H7N9) viruses have diversified into multiple lineages by dynamically reassorting with other viruses, especially H9N2, in Chinese poultry. Despite concerns about the pandemic threat posed by H7N9 viruses, little is known about the biological properties of H7N9 viruses that may recruit internal genes from genetically distinct H9N2 viruses circulating among wild birds. Here, we generated 63 H7N9 reassortants derived from an avian H7N9 and a wild-bird-origin H9N2 virus. Compared with the wild-type parent, 25/63 reassortants had increased pathogenicity in mice. A reassortant containing PB1 of the H9N2 virus was highly lethal to mice and chickens but was not transmissible to guinea pigs by airborne routes; however, three substitutions associated with adaptation to mammals conferred airborne transmission to the virus. The emergence of the H7N9-pandemic reassortant virus highlights that continuous monitoring of H7N9 viruses is needed, especially at the domestic poultry/wild bird interface.
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Affiliation(s)
- Wen Su
- National Research Center for Wildlife Born Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of the Chinese Academy of Sciences, Beijing 100101, China
| | - Chengmin Wang
- National Research Center for Wildlife Born Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jing Luo
- National Research Center for Wildlife Born Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yuliang Zhao
- National Research Center for Wildlife Born Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yan Wu
- Department of Infectious Diseases, Hangzhou Center for Disease Control and Prevention, Hangzhou, Zhejiang 310021, China
| | - Lin Chen
- National Research Center for Wildlife Born Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of the Chinese Academy of Sciences, Beijing 100101, China
| | - Na Zhao
- National Research Center for Wildlife Born Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of the Chinese Academy of Sciences, Beijing 100101, China
| | - Meng Li
- National Research Center for Wildlife Born Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China; University of the Chinese Academy of Sciences, Beijing 100101, China
| | - Chao Xing
- National Research Center for Wildlife Born Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Huimin Liu
- National Research Center for Wildlife Born Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Hong Zhang
- National Research Center for Wildlife Born Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China
| | - Yung-fu Chang
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University Ithaca, NY 14853-5786, USA
| | - Tianxian Li
- State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
| | - Hua Ding
- Department of Infectious Diseases, Hangzhou Center for Disease Control and Prevention, Hangzhou, Zhejiang 310021, China
| | - Xiufeng Wan
- Department of Basic Sciences, College of Veterinary Medicine, and Institute for Genomics, Biocomputing and Biotechnology, Mississippi State University, Mississippi State, MS 39762, USA
| | - Hongxuan He
- National Research Center for Wildlife Born Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.
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