1
|
Baek YG, Lee YN, Cha RM, Park MJ, Lee YJ, Park CK, Lee EK. Research Note: Comparative evaluation of pathogenicity in SPF chicken between different subgroups of H5N6 high pathogenicity avian influenza viruses. Poult Sci 2024; 103:103289. [PMID: 38103528 PMCID: PMC10764262 DOI: 10.1016/j.psj.2023.103289] [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: 07/27/2023] [Revised: 11/02/2023] [Accepted: 11/13/2023] [Indexed: 12/19/2023] Open
Abstract
Since 2014, periodic outbreaks of high pathogenicity avian influenza (HPAI) caused by clade 2.3.4.4 H5 HPAI virus (HPAIV) have resulted in huge economic losses in the Korean poultry industry. During the winter season of 2016-2017, clade 2.3.4.4e H5N6 HPAIVs classified into 5 subgroups (C1-5) were introduced into South Korea. Interestingly, it was revealed that the subgroup C2 and C4 viruses were predominantly distributed throughout the country, whereas detection of the subgroup C3 viruses was confined in a specific local region. In the present study, we conducted comparative evaluation of the pathogenicity of viruses belonging to subgroups C2 and C3 (H15 and HN1 strains) in specific pathogen-free (SPF) chickens, and further compared them with previously determined pathogenicity of subgroup C4 (ES2 strain) virus. The HN1 strain showed lower viral replication in tissues, less transmissibility, and higher mean chicken lethal dose than the H15 and ES2 strains in SPF chickens. Considering that the HN1 strain has a different NS gene segment from the H15 and ES2 strains, the reassortment of the NS gene segment likely affects their infectivity and transmissibility in chickens. These findings emphasize the importance of monitoring the genetic characteristics and pathogenic features of HPAIVs to effectively control their outbreaks in the field.
Collapse
Affiliation(s)
- Yoon-Gi Baek
- Avian Influenza Research & Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, Gyeongsangbuk-do 39660, Republic of Korea; College of Veterinary Medicine & Institute for Veterinary Biomedical Science, Kyungpook National University, Buk-gu, Daegu 41566, Republic of Korea
| | - Yu-Na Lee
- Avian Influenza Research & Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, Gyeongsangbuk-do 39660, Republic of Korea
| | - Ra Mi Cha
- Avian Influenza Research & Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, Gyeongsangbuk-do 39660, Republic of Korea
| | - Min-Ji Park
- Avian Influenza Research & Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, Gyeongsangbuk-do 39660, Republic of Korea
| | - Youn-Jeong Lee
- Avian Influenza Research & Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, Gyeongsangbuk-do 39660, Republic of Korea
| | - Choi-Kyu Park
- College of Veterinary Medicine & Institute for Veterinary Biomedical Science, Kyungpook National University, Buk-gu, Daegu 41566, Republic of Korea.
| | - Eun-Kyoung Lee
- Avian Influenza Research & Diagnostic Division, Animal and Plant Quarantine Agency, Gimcheon-si, Gyeongsangbuk-do 39660, Republic of Korea.
| |
Collapse
|
2
|
Sun H, Deng G, Sun H, Song J, Zhang W, Li H, Wei X, Li F, Zhang X, Liu J, Pu J, Sun Y, Tong Q, Bi Y, Xie Y, Qi J, Chang KC, Gao GF, Liu J. N-linked glycosylation enhances hemagglutinin stability in avian H5N6 influenza virus to promote adaptation in mammals. PNAS NEXUS 2022; 1:pgac085. [PMID: 36741455 PMCID: PMC9896958 DOI: 10.1093/pnasnexus/pgac085] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 06/05/2022] [Indexed: 02/07/2023]
Abstract
Clade 2.3.4.4 avian H5Ny viruses, namely H5N2, H5N6, and H5N8, have exhibited unprecedented intercontinental spread in poultry. Among them, only H5N6 viruses are frequently reported to infect mammals and cause serious human infections. In this study, the genetic and biological characteristics of surface hemagglutinin (HA) from clade 2.3.4.4 H5Ny avian influenza viruses (AIVs) were examined for adaptation in mammalian infection. Phylogenetic analysis identified an amino acid (AA) deletion at position 131 of HA as a distinctive feature of H5N6 virus isolated from human patients. This single AA deletion was found to enhance H5N6 virus replication and pathogenicity in vitro and in mammalian hosts (mice and ferrets) through HA protein acid and thermal stabilization that resulted in reduced pH threshold from pH 5.7 to 5.5 for viral-endosomal membrane fusion. Mass spectrometry and crystal structure revealed that the AA deletion in HA at position 131 introduced an N-linked glycosylation site at 129, which increases compactness between HA monomers, thus stabilizes the trimeric structure. Our findings provide a molecular understanding of how HA protein stabilization promotes cross-species avian H5N6 virus infection to mammalian hosts.
Collapse
Affiliation(s)
| | | | | | | | | | - Han Li
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Xiaohui Wei
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Fangtao Li
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Xin Zhang
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Jiyu Liu
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Juan Pu
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Yipeng Sun
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Qi Tong
- Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Yuhai Bi
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing 100101, China
| | - Yufeng Xie
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing 100101, China,Department of Basic Medical Sciences, School of Medicine, Tsinghua University, Beijing 100084, China
| | - Jianxun Qi
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing 100101, China
| | - Kin-Chow Chang
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| | - George Fu Gao
- CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences (CAS), Beijing 100101, China,Chinese National Influenza Center, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention (China CDC), Beijing 102206, China,WHO Collaborating Center for Reference and Research on Influenza, Beijing 102206, China
| | - Jinhua Liu
- To whom correspondence should be addressed:
| |
Collapse
|
3
|
Wang L, Yang F, Xiao Y, Chen B, Liu F, Cheng L, Yao H, Wu N, Wu H. Generation, characterization, and protective ability of mouse monoclonal antibodies against the HA of A (H1N1) influenza virus. J Med Virol 2022; 94:2558-2567. [PMID: 35005794 DOI: 10.1002/jmv.27584] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 01/03/2022] [Accepted: 01/06/2022] [Indexed: 12/16/2022]
Abstract
Influenza virus infections pose a continuous threat to human health. Although vaccines function as a preventive and protective tool, they may not be effective due to antigen drift or an inaccurate prediction of epidemic strains. Monoclonal antibodies (mAbs) have attracted wide attention as a promising therapeutic method for influenza virus infections. In this study, three hemagglutinin (HA)-specific mAbs, named 2A1, 2H4, and 2G2, respectively, were derived from mice immunized with the HA protein from A/Michigan/45/2015(H1N1). The isolated mAbs all displayed hemagglutination inhibition activity and the 2G2 mAb exhibited the strongest neutralization effect. Two amino acid mutations (A198E and G173E), recognized in the process of selection of mAb-resistant mutants, were located in antigenic site Sb and Ca1, respectively. In prophylactic experiments, all three mAbs could achieve 100% protection in mice infected with a lethal dose of A/Michigan/45/2015(H1N1). A dose of 1 mg/kg for 2H4 and 2G2 was sufficient to achieve a full protective effect. Therapeutic experiments showed that all three mAbs could protect mice from death if they received the mAb administration at 6 h postinfection, and 2G2 was still protective after 24 h. Our findings indicate that these three mAbs may have potential prevention and treatment value in an H1N1 epidemic, as well as in the study of antigen epitope recognition.
Collapse
Affiliation(s)
- Liyan Wang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China.,Geriatrics, Shaoxing People's Hospital, Shaoxing, China
| | - Fan Yang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yixin Xiao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Bin Chen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Fumin Liu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Linfang Cheng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Hangping Yao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Nanping Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Haibo Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| |
Collapse
|
4
|
Lijuan Z, Fuchang W, Hongri L. A Stochastic SEIRS Epidemic Model with Infection Forces and Intervention Strategies. JOURNAL OF HEALTHCARE ENGINEERING 2022; 2022:4538045. [PMID: 35047150 PMCID: PMC8763553 DOI: 10.1155/2022/4538045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 12/04/2021] [Indexed: 11/17/2022]
Abstract
The spread of epidemics has been extensively investigated using susceptible-exposed infectious-recovered-susceptible (SEIRS) models. In this work, we propose a SEIRS pandemic model with infection forces and intervention strategies. The proposed model is characterized by a stochastic differential equation (SDE) framework with arbitrary parameter settings. Based on a Markov semigroup hypothesis, we demonstrate the effect of the proliferation number R 0 S on the SDE solution. On the one hand, when R 0 S < 1, the SDE has an illness-free solution set under gentle additional conditions. This implies that the epidemic can be eliminated with a likelihood of 1. On the other hand, when R 0 S > 1, the SDE has an endemic stationary circulation under mild additional conditions. This prompts the stochastic regeneration of the epidemic. Also, we show that arbitrary fluctuations can reduce the infection outbreak. Hence, valuable procedures can be created to manage and control epidemics.
Collapse
Affiliation(s)
- Zhang Lijuan
- Institute of Disaster Prevention, Basic Course Teaching Department, Yanjiao Sanhe 065201, Hebei, China
| | - Wang Fuchang
- Institute of Disaster Prevention, Basic Course Teaching Department, Yanjiao Sanhe 065201, Hebei, China
| | - Liang Hongri
- Institute of Disaster Prevention, Basic Course Teaching Department, Yanjiao Sanhe 065201, Hebei, China
| |
Collapse
|
5
|
Live poultry feeding and trading network and the transmission of avian influenza A(H5N6) virus in a large city in China, 2014-2015. Int J Infect Dis 2021; 108:72-80. [PMID: 34000420 DOI: 10.1016/j.ijid.2021.05.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/08/2021] [Accepted: 05/11/2021] [Indexed: 11/21/2022] Open
Abstract
OBJECTIVES To understand the transmission mechanisms of the avian influenza A(H5N6) virus. METHODS This study explored the live poultry feeding and trading network (LPFTN) around Changsha city, China. Field epidemiological investigations were performed in Changsha to investigate the LPFTN with the environmental samples systematically collected during 2014-2015 to monitor and analyze the spread of the A(H5N6) virus. Two surveillance systems were also applied to find possible human cases of A(H5N6) infection. RESULT The information of all the 665 live poultry farming sites, five wholesale markets, and 223 retail markets in Changsha was collected to investigate the LPFTN. Moreover, about 840 environmental samples were systematically collected from the LPFTN during 2014-2015 to monitor the spread of the A(H5N6) virus, with 8.45% (71/840) positive for the N6 subtype. Furthermore, the full genome sequences of 10 A(H5N6) viruses detected from the environmental samples were obtained, which were then characterized and phylogenetically analyzed with the corresponding gene segments of the A(H5N6) virus obtained from GenBank, to determine the source of human infection. CONCLUSION It was demonstrated that the LPFTN provided a platform for the H5N6 transmission, and formed an infectious pool for the spread of the virus to humans.
Collapse
|
6
|
Neurovirulence of avian influenza virus is dependent on the interaction of viral NP protein with host factor FMRP in the murine brain. J Virol 2021; 95:JVI.01272-20. [PMID: 33408179 PMCID: PMC8092684 DOI: 10.1128/jvi.01272-20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Avian influenza viruses (AIVs) are zoonotic viruses that exhibit a range infectivity and severity in the human host. Severe human cases of AIVs infection are often accompanied by neurological symptoms, however, the factors involved in the infection of the central nervous system (CNS) are not well known. In this study, we discovered that avian-like sialic acid (SA)-α2, 3 Gal receptor is highly presented in mammalian (human and mouse) brains. In the generation of a mouse-adapted neurotropic H9N2 AIV (SD16-MA virus) in BALB/c mice, we identified key adaptive mutations in its hemagglutinin (HA) and polymerase basic protein 2 (PB2) genes that conferred viral replication ability in mice brain. The SD16-MA virus showed binding affinity for avian-like SA-α2, 3 Gal receptor, enhanced viral RNP polymerase activity, increased viral protein production and transport that culminated in elevated progeny virus production and severe pathogenicity. We further established that host Fragile X Mental Retardation Protein (FMRP), a highly expressed protein in the brain that physically associated with viral nucleocapsid protein (NP) to facilitate RNP assembly and export, was an essential host factor for the neuronal replication of neurotropic AIVs (H9N2, H5N1 and H10N7 viruses). Our study identified a mechanistic process for AIVs to acquire neurovirulence in mice.IMPORTANCE Infection of the CNS is a serious complication of human cases of AIVs infection. The viral and host factors associated with neurovirulence of AIVs infection are not well understood. We identified and functionally characterized specific changes in the viral HA and PB2 genes of a mouse-adapted neurotropic avian H9N2 virus responsible for enhanced virus replication in neuronal cells and pathogenicity in mice. Importantly, we showed that host FMRP was a crucial host factor that was necessary for neurotropic AIVs (H9N2, H5N1 and H10N7 viruses) to replicate in neuronal cells. Our findings have provided insights into the pathogenesis of neurovirulence of AIV infection.
Collapse
|
7
|
Isolation and characterization of two novel reassortant H5N6 avian influenza viruses from waterfowl in eastern China. Arch Virol 2021; 166:1197-1201. [PMID: 33598814 DOI: 10.1007/s00705-021-04995-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 12/28/2020] [Indexed: 10/22/2022]
Abstract
Waterfowl are considered to be the natural hosts of avian influenza virus. In 2017, two reassortant highly pathogenic H5N6 avian influenza viruses of clade 2.3.4.4, subclade II, were identified in wild birds in eastern China. Genome sequencing and phylogenetic and antigenicity analysis showed that the viruses originated from multiple reassortments. To evaluate their pathogenicity in mammals, 15 BALB/c mice were infected with these viruses, and survival and weight loss were monitored for 14 days. Infection was associated with moderate pathogenicity in the mice, and the viruses could replicate in the lungs without prior adaptation. Thus, the existence of these viruses poses a continuous threat to both birds and humans.
Collapse
|
8
|
Cell-penetrating peptide-mediated cell entry of H5N1 highly pathogenic avian influenza virus. Sci Rep 2020; 10:18008. [PMID: 33093460 PMCID: PMC7582914 DOI: 10.1038/s41598-020-74604-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 10/01/2020] [Indexed: 11/22/2022] Open
Abstract
H5N1 highly pathogenic avian influenza virus (HPAIV) poses a huge threat to public health and the global economy. These viruses cause systemic infection in poultry and accidental human infection leads to severe pneumonia, associated with high mortality rates. The hemagglutinin (HA) of H5N1 HPAIV possesses multiple basic amino acids, as in the sequence RERRRKKR at the cleavage site; however, the role of this motif is not fully understood. Here, we showed that a 33-amino acid long peptide derived from HA of H5N1 HPAIV (HA314-46) has the potential to penetrate various cells and lung tissue through a sialic acid-independent endocytotic pathway. Mutant peptide analyses revealed that the cysteine residue at position 318 and multiple basic amino acids were essential for the cell-penetrating activity. Moreover, reassortant viruses possessing H5 HA could enter sialic acid-deficient cells, and virus internalisation was facilitated by cleavage with recombinant furin. Thus, our findings demonstrate that the HA314-46 motif exhibits cell-penetrating activity through a sialic acid-independent cell entry mechanism.
Collapse
|
9
|
Li H, Li Q, Li B, Guo Y, Xing J, Xu Q, Liu L, Zhang J, Qi W, Jia W, Liao M. Continuous Reassortment of Clade 2.3.4.4 H5N6 Highly Pathogenetic Avian Influenza Viruses Demonstrating High Risk to Public Health. Pathogens 2020; 9:pathogens9080670. [PMID: 32824873 PMCID: PMC7460007 DOI: 10.3390/pathogens9080670] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2020] [Revised: 08/13/2020] [Accepted: 08/16/2020] [Indexed: 01/08/2023] Open
Abstract
Since it firstly emerged in China in 2013, clade 2.3.4.4 H5N6 highly pathogenic avian influenza viruses (HPAIVs) has rapidly replaced predominant H5N1 to become the dominant H5 subtype in China, especially in ducks. Not only endemic in China, it also crossed the geographical barrier and emerged in South Korea, Japan, and Europe. Here, we analyzed the genetic properties of the clade 2.3.4.4 H5N6 HPAIVs with full genome sequences available online together with our own isolates. Phylogenetic analysis showed that clade 2.3.4.4 H5N6 HPAIVs continuously reassorted with local H5, H6, and H7N9/H9N2. Species analysis reveals that aquatic poultry and migratory birds became the dominant hosts of H5N6. Adaption to aquatic poultry might help clade 2.3.4.4 H5N6 better adapt to migratory birds, thus enabling it to become endemic in China. Besides, migratory birds might help clade 2.3.4.4 H5N6 transmit all over the world. Clade 2.3.4.4 H5N6 HPAIVs also showed a preference for α2,6-SA receptors when compared to other avian origin influenza viruses. Experiments in vitro and in vivo revealed that clade 2.3.4.4 H5N6 HPAIVs exhibited high replication efficiency in both avian and mammal cells, and it also showed high pathogenicity in both mice and chickens, demonstrating high risk to public health. Considering all the factors together, adaption to aquatic poultry and migratory birds helps clade 2.3.4.4 H5N6 overcome the geographical isolation, and it has potential to be the next influenza pandemic in the world, making it worthy of our attention.
Collapse
Affiliation(s)
- Huanan Li
- National Avian Influenza Para-Reference Laboratory (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (H.L.); (Q.L.); (B.L.); (Y.G.); (J.X.); (Q.X.); (L.L.); (J.Z.); (W.Q.)
- Key Laboratory of Zoonosis, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Guangzhou 510642, China
- Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Qian Li
- National Avian Influenza Para-Reference Laboratory (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (H.L.); (Q.L.); (B.L.); (Y.G.); (J.X.); (Q.X.); (L.L.); (J.Z.); (W.Q.)
- Xiaqiu Animal Husbandry & Veterinary Station, Yantai 261400, China
| | - Bo Li
- National Avian Influenza Para-Reference Laboratory (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (H.L.); (Q.L.); (B.L.); (Y.G.); (J.X.); (Q.X.); (L.L.); (J.Z.); (W.Q.)
- Key Laboratory of Zoonosis, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Guangzhou 510642, China
- Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Yang Guo
- National Avian Influenza Para-Reference Laboratory (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (H.L.); (Q.L.); (B.L.); (Y.G.); (J.X.); (Q.X.); (L.L.); (J.Z.); (W.Q.)
- Key Laboratory of Zoonosis, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Guangzhou 510642, China
- Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Jinchao Xing
- National Avian Influenza Para-Reference Laboratory (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (H.L.); (Q.L.); (B.L.); (Y.G.); (J.X.); (Q.X.); (L.L.); (J.Z.); (W.Q.)
- Key Laboratory of Zoonosis, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Guangzhou 510642, China
- Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Qiang Xu
- National Avian Influenza Para-Reference Laboratory (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (H.L.); (Q.L.); (B.L.); (Y.G.); (J.X.); (Q.X.); (L.L.); (J.Z.); (W.Q.)
- Key Laboratory of Zoonosis, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
- Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Lele Liu
- National Avian Influenza Para-Reference Laboratory (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (H.L.); (Q.L.); (B.L.); (Y.G.); (J.X.); (Q.X.); (L.L.); (J.Z.); (W.Q.)
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Guangzhou 510642, China
| | - Jiahao Zhang
- National Avian Influenza Para-Reference Laboratory (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (H.L.); (Q.L.); (B.L.); (Y.G.); (J.X.); (Q.X.); (L.L.); (J.Z.); (W.Q.)
- Key Laboratory of Zoonosis, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
- Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Wenbao Qi
- National Avian Influenza Para-Reference Laboratory (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (H.L.); (Q.L.); (B.L.); (Y.G.); (J.X.); (Q.X.); (L.L.); (J.Z.); (W.Q.)
- Key Laboratory of Zoonosis, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Guangzhou 510642, China
- Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou 510642, China
| | - Weixin Jia
- National Avian Influenza Para-Reference Laboratory (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (H.L.); (Q.L.); (B.L.); (Y.G.); (J.X.); (Q.X.); (L.L.); (J.Z.); (W.Q.)
- Key Laboratory of Zoonosis, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Guangzhou 510642, China
- Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou 510642, China
- Correspondence: (W.J.); (M.L.); Tel.: +86-020-8528-3309 (W.J.); +86-020-8528-0240 (M.L.)
| | - Ming Liao
- National Avian Influenza Para-Reference Laboratory (Guangzhou), College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (H.L.); (Q.L.); (B.L.); (Y.G.); (J.X.); (Q.X.); (L.L.); (J.Z.); (W.Q.)
- Key Laboratory of Zoonosis, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China
- Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
- National and Regional Joint Engineering Laboratory for Medicament of Zoonosis Prevention and Control, Guangzhou 510642, China
- Key Laboratory of Zoonoses Prevention and Control of Guangdong Province, Guangzhou 510642, China
- Correspondence: (W.J.); (M.L.); Tel.: +86-020-8528-3309 (W.J.); +86-020-8528-0240 (M.L.)
| |
Collapse
|
10
|
Furuyama W, Reynolds P, Haddock E, Meade-White K, Quynh Le M, Kawaoka Y, Feldmann H, Marzi A. A single dose of a vesicular stomatitis virus-based influenza vaccine confers rapid protection against H5 viruses from different clades. NPJ Vaccines 2020; 5:4. [PMID: 31934358 PMCID: PMC6954110 DOI: 10.1038/s41541-019-0155-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 12/20/2019] [Indexed: 12/02/2022] Open
Abstract
The avian influenza virus outbreak in 1997 highlighted the potential of the highly pathogenic H5N1 virus to cause severe disease in humans. Therefore, effective vaccines against H5N1 viruses are needed to counter the potential threat of a global pandemic. We have previously developed a fast-acting and efficacious vaccine against Ebola virus (EBOV) using the vesicular stomatitis virus (VSV) platform. In this study, we generated recombinant VSV-based H5N1 influenza virus vectors to demonstrate the feasibility of this platform for a fast-acting pan-H5 influenza virus vaccine. We chose multiple approaches regarding antigen design and genome location to define a more optimized vaccine approach. After the VSV-based H5N1 influenza virus constructs were recovered and characterized in vitro, mice were vaccinated by a single dose or prime/boost regimen followed by challenge with a lethal dose of the homologous H5 clade 1 virus. We found that a single dose of VSV vectors expressing full-length hemagglutinin (HAfl) were sufficient to provide 100% protection. The vaccine vectors were fast-acting as demonstrated by uniform protection when administered 3 days prior to lethal challenge. Moreover, single vaccination induced cross-protective H5-specific antibodies and protected mice against lethal challenge with various H5 clade 2 viruses, highlighting the potential of the VSV-based HAfl as a pan-H5 influenza virus emergency vaccine.
Collapse
Affiliation(s)
- Wakako Furuyama
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT USA
| | - Pierce Reynolds
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT USA
- Present Address: Mayo Clinic Graduate School of Biomedical Sciences, Rochester, MN USA
| | - Elaine Haddock
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT USA
| | - Kimberly Meade-White
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT USA
| | - Mai Quynh Le
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Yoshihiro Kawaoka
- Department of Pathobiological Sciences, University of Wisconsin-Madison, Madison, WI USA
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, Univeristy of Tokyo, Tokyo, Japan
| | - Heinz Feldmann
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT USA
| | - Andrea Marzi
- Laboratory of Virology, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT USA
| |
Collapse
|
11
|
Song Y, Li W, Wu W, Liu Z, He Z, Chen Z, Zhao B, Wu S, Yang C, Qu X, Liao M, Jiao P. Phylogeny, Pathogenicity, Transmission, and Host Immune Responses of Four H5N6 Avian Influenza Viruses in Chickens and Mice. Viruses 2019; 11:v11111048. [PMID: 31717638 PMCID: PMC6893672 DOI: 10.3390/v11111048] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 11/05/2019] [Accepted: 11/07/2019] [Indexed: 12/26/2022] Open
Abstract
H5Nx viruses have continuously emerged in the world, causing poultry industry losses and posing a potential public health risk. Here, we studied the phylogeny, pathogenicity, transmission, and immune response of four H5N6 avian influenza viruses in chickens and mice, which were isolated from waterfowl between 2013 and 2014. Their HA genes belong to Clade 2.3.4.4, circulated in China since 2008. Their NA genes fall into N6-like/Eurasian sublineage. Their internal genes originated from different H5N1 viruses. The results suggested that the four H5N6 viruses were reassortants of the H5N1 and H6N6 viruses. They cause lethal infection with high transmission capability in chickens. They also cause mild to severe pathogenicity in mice and can spread to the brain through the blood–brain barrier. During the infection, the viruses result in the up-regulation of PRRs and cytokine in brains and lungs of chickens and mice. Our results suggested that the high viral loads of several organs may result in disease severity in chickens and mice; there were varying levels of cytokines induced by the H5N6 viruses with different pathogenicity in chickens and mice.
Collapse
Affiliation(s)
- Yafen Song
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (Y.S.); (W.L.); (W.W.); (Z.L.); (Z.H.); (Z.C.); (B.Z.); (S.W.); (X.Q.)
- China Institute of Veterinary Drug Control, Beijing 100081, China;
| | - Weiqiang Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (Y.S.); (W.L.); (W.W.); (Z.L.); (Z.H.); (Z.C.); (B.Z.); (S.W.); (X.Q.)
| | - Wenbo Wu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (Y.S.); (W.L.); (W.W.); (Z.L.); (Z.H.); (Z.C.); (B.Z.); (S.W.); (X.Q.)
| | - Zhiting Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (Y.S.); (W.L.); (W.W.); (Z.L.); (Z.H.); (Z.C.); (B.Z.); (S.W.); (X.Q.)
| | - Zhuoliang He
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (Y.S.); (W.L.); (W.W.); (Z.L.); (Z.H.); (Z.C.); (B.Z.); (S.W.); (X.Q.)
| | - Zuxian Chen
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (Y.S.); (W.L.); (W.W.); (Z.L.); (Z.H.); (Z.C.); (B.Z.); (S.W.); (X.Q.)
| | - Bingbing Zhao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (Y.S.); (W.L.); (W.W.); (Z.L.); (Z.H.); (Z.C.); (B.Z.); (S.W.); (X.Q.)
| | - Siyu Wu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (Y.S.); (W.L.); (W.W.); (Z.L.); (Z.H.); (Z.C.); (B.Z.); (S.W.); (X.Q.)
| | - Chenghuai Yang
- China Institute of Veterinary Drug Control, Beijing 100081, China;
| | - Xiaoyun Qu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (Y.S.); (W.L.); (W.W.); (Z.L.); (Z.H.); (Z.C.); (B.Z.); (S.W.); (X.Q.)
| | - Ming Liao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (Y.S.); (W.L.); (W.W.); (Z.L.); (Z.H.); (Z.C.); (B.Z.); (S.W.); (X.Q.)
- Correspondence: (P.J.); (M.L.); Tel.: +86-020-85283309 (M.L. & P.J.)
| | - Peirong Jiao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China; (Y.S.); (W.L.); (W.W.); (Z.L.); (Z.H.); (Z.C.); (B.Z.); (S.W.); (X.Q.)
- Correspondence: (P.J.); (M.L.); Tel.: +86-020-85283309 (M.L. & P.J.)
| |
Collapse
|
12
|
Yang G, Chowdury S, Hodges E, Rahman MZ, Jang Y, Hossain ME, Jones J, Stark TJ, Di H, Cook PW, Ghosh S, Azziz-Baumgartner E, Barnes JR, Wentworth DE, Kennedy E, Davis CT. Detection of highly pathogenic avian influenza A(H5N6) viruses in waterfowl in Bangladesh. Virology 2019; 534:36-44. [DOI: 10.1016/j.virol.2019.05.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 05/21/2019] [Accepted: 05/21/2019] [Indexed: 11/24/2022]
|
13
|
Li X, Xu B, Shaman J. Pathobiological features favouring the intercontinental dissemination of highly pathogenic avian influenza virus. ROYAL SOCIETY OPEN SCIENCE 2019; 6:190276. [PMID: 31218065 PMCID: PMC6549942 DOI: 10.1098/rsos.190276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 04/08/2019] [Indexed: 06/09/2023]
Abstract
Avian influenza viruses (AIVs) are a continued threat to global health and economy. Unlike other highly pathogenic AIVs, novel H5N8 disseminated very quickly from Korea to other areas in Asia, Europe and even North America following its first outbreak in 2014. However, the pathobiological features of the virus that favoured its global translocation remain unknown. In this study, we used a compartmental model to examine the avian epidemiological characteristics that would support the geographical spread of influenza by bird migration, and to provide recommendations for AIV surveillance in wild bird populations. We simulated virus transmission and translocation in a migratory bird population while varying four system properties: (i) contact transmission rate; (ii) infection recovery rate; (iii) mortality rate induced by infection; and (iv) migratory recovery rate. Using these simulations, we then calculated extinction and translocation probabilities for influenza during spring migration as a function of the altered properties. We find that lower infection recovery rates increase the likelihood of AIV translocation in migratory bird populations. In addition, lower mortality rates or migration recovery rates also favour translocation. Our results identify pathobiological features supporting AIV intercontinental dissemination risk and suggest that characteristic differences exist among H5N8 and other AIV subtypes that have not translocated as rapidly (e.g. H5N6 and H5N1).
Collapse
Affiliation(s)
- Xueying Li
- Department of Earth System Science, Ministry of Education Key Laboratory for Earth System Modelling, Tsinghua, Beijing, People's Republic of China
- Department of Environmental Health Sciences, Columbia University, New York, NY, USA
| | - Bing Xu
- Department of Earth System Science, Ministry of Education Key Laboratory for Earth System Modelling, Tsinghua, Beijing, People's Republic of China
- State Key Laboratory of Remote Sensing Science, College of Global Change and Earth System Science, Beijing Normal University, Beijing, People's Republic of China
| | - Jeffrey Shaman
- Department of Environmental Health Sciences, Columbia University, New York, NY, USA
| |
Collapse
|
14
|
Cross- immunity of a H9N2 live attenuated influenza vaccine against H5N2 highly pathogenic avian influenza virus in chickens. Vet Microbiol 2018; 220:57-66. [DOI: 10.1016/j.vetmic.2018.05.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 05/06/2018] [Accepted: 05/09/2018] [Indexed: 01/27/2023]
|
15
|
Pan W, Xie H, Li X, Guan W, Chen P, Zhang B, Zhang M, Dong J, Wang Q, Li Z, Li S, Yang Z, Li C, Zhong N, Huang J, Chen L. Patient-derived avian influenza A (H5N6) virus is highly pathogenic in mice but can be effectively treated by anti-influenza polyclonal antibodies. Emerg Microbes Infect 2018; 7:107. [PMID: 29899428 PMCID: PMC6000000 DOI: 10.1038/s41426-018-0113-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 05/04/2018] [Accepted: 05/13/2018] [Indexed: 11/30/2022]
Abstract
Highly pathogenic avian influenza A (H5N6) virus has been circulating in poultry since 2013 and causes sporadic infections and fatalities in humans. Due to the re-occurrence and continuous evolution of this virus subtype, there is an urgent need to better understand the pathogenicity of the H5N6 virus and to identify effective preventative and therapeutic strategies. We established a mouse model to evaluate the virulence of H5N6 A/Guangzhou/39715/2014 (H5N6/GZ14), which was isolated from an infected patient. BALB/c mice were inoculated intranasally with H5N6/GZ14 and monitored for morbidity, mortality, cytokine production, lung injury, viral replication, and viral dissemination to other organs. H5N6/GZ14 is highly pathogenic and can kill 50% of mice at a very low infectious dose of 5 plaque-forming units (pfu). Infection with H5N6/GZ14 showed rapid disease progression, viral replication to high titers in the lung, a strongly induced pro-inflammatory cytokine response, and severe lung injury. Moreover, infectious H5N6/GZ14 could be detected in the heart and brain of the infected mice. We also demonstrated that anti-influenza polyclonal antibodies generated by immunizing rhesus macaques could protect mice from lethal infection. Our results provide insights into the pathogenicity of the H5N6 human isolate.
Collapse
Affiliation(s)
- Weiqi Pan
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Haojun Xie
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xiaobo Li
- Health Quarantine Laboratory, Guangdong Inspection and Quarantine Technology Center, Guangzhou, China
| | - Wenda Guan
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Peihai Chen
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Beiwu Zhang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Mincong Zhang
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Ji Dong
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Qian Wang
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Zhixia Li
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China
| | - Shufen Li
- Health Quarantine Laboratory, Guangdong Inspection and Quarantine Technology Center, Guangzhou, China
| | - Zifeng Yang
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Chufang Li
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Nanshan Zhong
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jicheng Huang
- Health Quarantine Laboratory, Guangdong Inspection and Quarantine Technology Center, Guangzhou, China.
| | - Ling Chen
- State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China. .,Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, China.
| |
Collapse
|
16
|
Wang X, Zeng Z, Zhang Z, Zheng Y, Li B, Su G, Li H, Huang L, Qi W, Liao M. The Appropriate Combination of Hemagglutinin and Neuraminidase Prompts the Predominant H5N6 Highly Pathogenic Avian Influenza Virus in Birds. Front Microbiol 2018; 9:1088. [PMID: 29896169 PMCID: PMC5987672 DOI: 10.3389/fmicb.2018.01088] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 05/07/2018] [Indexed: 11/13/2022] Open
Abstract
Haemagglutinin (HA) and neuraminidase (NA) are two vital surface glycoproteins of influenza virus. The HA of H5N6 highly pathogenic avian influenza virus is divided into Major/H5 and Minor/H5, and its NA consists of short stalk NA and full-length stalk NA. The strain combined with Major/H5 and short stalk NA account for 76.8% of all strains, and the proportion was 23.0% matched by Minor/H5 and full-length stalk NA. Our objective was to investigate the influence of HA-NA matching on the biological characteristics and the effects of the epidemic trend of H5N6 on mice and chickens. Four different strains combined with two HAs and two NAs of the represented H5N6 viruses with the fixed six internal segments were rescued and analyzed. Plaque formation, NA activity of infectious particles, and virus growth curve assays, as well as a saliva acid receptor experiment, with mice and chickens were performed. We found that all the strains can replicate well on Madin-Darby canine kidney (MDCK) cells and chicken embryo fibroblasts (CEF) cells, simultaneously, mice and infection group chickens were complete lethal. However, the strain combined with Major/H5 and short stalk N6 formed smaller plaque on MDCK, showed a moderate replication ability in both MDCK and CEF, and exhibited a higher survival rate among the contact group of chickens. Conversely, strains with opposite biological characters which combined with Minor/H5 and short stalk N6 seldom exist in nature. Hence, we drew the conclusion that the appropriate combination of Major/H5 and short stalk N6 occur widely in nature with appropriate biological characteristics for the proliferation and transmission, whereas other combinations of HA and NA had a low proportion and even have not yet been detected.
Collapse
Affiliation(s)
- Xiuhui Wang
- National and Regional Joint Engineering Laboratory for Medicament of Zoonoses Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Zhaoyong Zeng
- National and Regional Joint Engineering Laboratory for Medicament of Zoonoses Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Zaoyue Zhang
- National and Regional Joint Engineering Laboratory for Medicament of Zoonoses Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Yi Zheng
- National and Regional Joint Engineering Laboratory for Medicament of Zoonoses Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Bo Li
- National and Regional Joint Engineering Laboratory for Medicament of Zoonoses Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Guanming Su
- National and Regional Joint Engineering Laboratory for Medicament of Zoonoses Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Huanan Li
- National and Regional Joint Engineering Laboratory for Medicament of Zoonoses Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
| | - Lihong Huang
- National and Regional Joint Engineering Laboratory for Medicament of Zoonoses Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Department of Biomedical Sciences, College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Kowloon, Hong Kong
| | - Wenbao Qi
- National and Regional Joint Engineering Laboratory for Medicament of Zoonoses Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou, China
| | - Ming Liao
- National and Regional Joint Engineering Laboratory for Medicament of Zoonoses Prevention and Control, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, South China Agricultural University, Guangzhou, China.,Key Laboratory of Zoonosis Prevention and Control of Guangdong Province, Guangzhou, China
| |
Collapse
|
17
|
Development and evaluation of a real-time RT-PCR assay for detection of a novel avian influenza A (H5N6) virus. J Virol Methods 2018; 257:79-84. [PMID: 29729298 DOI: 10.1016/j.jviromet.2018.05.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 01/22/2018] [Accepted: 05/02/2018] [Indexed: 12/19/2022]
Abstract
As of Aug 25, 2017, 17 incidences of human infection and 6 deaths due to the novel H5N6 virus have been reported in China. Genetic analysis of the viral genome revealed that this reassortant virus is highly pathogenic to poultry, and that the virus has a risk of transmission to humans. Accordingly, the development of a rapid, sensitive, and specific molecular diagnostic assay is critical for public health. In this study, a real-time reverse-transcription PCR (RT-PCR) assay was developed to specifically detect the novel H5N6 virus, with primer pairs targeting the hemagglutinin and neuraminidase gene sequences of this virus. RNA was extracted from throat swab specimens from patients with influenza-like illness (ILIs), and environmental samples were collected from live poultry markets (LPMs) for H5N6 virus detection by real-time RT-PCR. The method was demonstrated to enable specific detection of the avian H5N6 virus, with no cross-reactivity with seasonal influenza viruses (H1N1, H1N1 pdm09, H3N2 or B); H5N1, H7N9, H9N2 viruses; or other human respiratory viruses. The detection limit of the assay was 1.0 × 101 copies per reaction for N6 and 1.0 × 102 copies per reaction for H5 assays. The assay is a powerful tool for rapid, sensitive, and specific detection of H5N6 virus infection in specimens derived from humans, animals, and the environment.
Collapse
|
18
|
Sun Z, Qin T, Meng F, Chen S, Peng D, Liu X. Development of a multiplex probe combination-based one-step real-time reverse transcription-PCR for NA subtype typing of avian influenza virus. Sci Rep 2017; 7:13455. [PMID: 29044197 PMCID: PMC5647442 DOI: 10.1038/s41598-017-13768-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 09/29/2017] [Indexed: 12/31/2022] Open
Abstract
Nine influenza virus neuraminidase (NA) subtypes have been identified in poultry and wild birds. Few methods are available for rapid and simple NA subtyping. Here we developed a multiplex probe combination-based one-step real-time reverse transcriptase PCR (rRT-PCR) to detect nine avian influenza virus NA subtypes. Nine primer-probe pairs were assigned to three groups based on the different fluorescent dyes of the probes (FAM, HEX, or Texas Red). Each probe detected only one NA subtype, without cross reactivity. The detection limit was less than 100 EID50 or 100 copies of cDNA per reaction. Data obtained using this method with allantoic fluid samples isolated from live bird markets and H9N2-infected chickens correlated well with data obtained using virus isolation and sequencing, but was more sensitive. This new method provides a specific and sensitive alternative to conventional NA-subtyping methods.
Collapse
Affiliation(s)
- Zhihao Sun
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu, 225009, PR China.,Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou, Jiangsu, 225009, PR China
| | - Tao Qin
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu, 225009, PR China.,Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou, Jiangsu, 225009, PR China
| | - Feifei Meng
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu, 225009, PR China.,Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou, Jiangsu, 225009, PR China
| | - Sujuan Chen
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu, 225009, PR China.,Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou, Jiangsu, 225009, PR China
| | - Daxin Peng
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China. .,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu, 225009, PR China. .,Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou, Jiangsu, 225009, PR China.
| | - Xiufan Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu, 225009, PR China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu, 225009, PR China.,Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou, Jiangsu, 225009, PR China
| |
Collapse
|
19
|
Zhang C, Zhao Z, Guo Z, Zhang J, Li J, Yang Y, Lu S, Wang Z, Zhi M, Fu Y, Yang X, Liu L, Zhang Y, Hua Y, Liu L, Chai H, Qian J. Amino Acid Substitutions Associated with Avian H5N6 Influenza A Virus Adaptation to Mice. Front Microbiol 2017; 8:1763. [PMID: 28966609 PMCID: PMC5605651 DOI: 10.3389/fmicb.2017.01763] [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: 05/15/2017] [Accepted: 08/30/2017] [Indexed: 02/02/2023] Open
Abstract
At least 15 cases of human beings infected with H5N6 have been reported since 2014, of which at least nine were fatal. The highly pathogenic avian H5N6 influenza virus may pose a serious threat to both public health and the poultry industry. However, the molecular features promoting the adaptation of avian H5N6 influenza viruses to mammalian hosts is not well understood. Here, we sequentially passaged an avian H5N6 influenza A virus (A/Northern Shoveler/Ningxia/488-53/2015) 10 times in mice to identify the adaptive amino acid substitutions that confer enhanced virulence to H5N6 in mammals. The 1st and 10th passages of the mouse-adapted H5N6 viruses were named P1 and P10, respectively. P1 and P10 displayed higher pathogenicity in mice than their parent strain. P10 showed significantly higher replication capability in vivo and could be detected in the brains of mice, whereas P1 displayed higher replication efficiency in their lungs but was not detectable in the brain. Similar to its parent strain, P10 remained no transmissible between guinea pigs. Using genome sequencing and alignment, multiple amino acid substitutions, including PB2 E627K, PB2 T23I, PA T97I, and HA R239H, were found in the adaptation of H5N6 to mice. In summary, we identified amino acid changes that are associated with H5N6 adaptation to mice.
Collapse
Affiliation(s)
- Chunmao Zhang
- Military Veterinary Research Institute, Academy of Military Medical SciencesChangchun, China
| | - Zongzheng Zhao
- Military Veterinary Research Institute, Academy of Military Medical SciencesChangchun, China
| | - Zhendong Guo
- Military Veterinary Research Institute, Academy of Military Medical SciencesChangchun, China
| | - Jiajie Zhang
- College of Wildlife Resources, Northeast Forestry UniversityHarbin, China
| | - Jiaming Li
- Military Veterinary Research Institute, Academy of Military Medical SciencesChangchun, China
| | - Yifei Yang
- Institute of Chinese Materia Medica, China Academy of Chinese Medical ScienceBeijing, China
| | - Shaoxia Lu
- College of Wildlife Resources, Northeast Forestry UniversityHarbin, China
| | - Zhongyi Wang
- Military Veterinary Research Institute, Academy of Military Medical SciencesChangchun, China
| | - Min Zhi
- College of Wildlife Resources, Northeast Forestry UniversityHarbin, China
| | - Yingying Fu
- Military Veterinary Research Institute, Academy of Military Medical SciencesChangchun, China
| | - Xiaoyu Yang
- College of Wildlife Resources, Northeast Forestry UniversityHarbin, China
| | - Lina Liu
- Military Veterinary Research Institute, Academy of Military Medical SciencesChangchun, China
| | - Yi Zhang
- Military Veterinary Research Institute, Academy of Military Medical SciencesChangchun, China
| | - Yuping Hua
- College of Wildlife Resources, Northeast Forestry UniversityHarbin, China
| | - Linna Liu
- Military Veterinary Research Institute, Academy of Military Medical SciencesChangchun, China
| | - Hongliang Chai
- College of Wildlife Resources, Northeast Forestry UniversityHarbin, China
| | - Jun Qian
- Military Veterinary Research Institute, Academy of Military Medical SciencesChangchun, China
| |
Collapse
|
20
|
Cao X, Yang F, Wu H, Xu L. Genetic characterization of novel reassortant H5N6-subtype influenza viruses isolated from cats in eastern China. Arch Virol 2017; 162:3501-3505. [PMID: 28730524 DOI: 10.1007/s00705-017-3490-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 07/06/2017] [Indexed: 12/01/2022]
Abstract
Cats are susceptible to influenza A viruses and therefore may act as transmission vectors within households, posing a potential public health concern. Two novel reassortant H5N6 influenza viruses were isolated from cats in Zhejiang Province, Eastern China, in 2016. Both viruses were characterized by whole-genome sequencing with subsequent phylogenetic analysis and genetic comparison. Phylogenetic analysis showed that these viruses received their genes from H5N6, H9N2, and H7N9 influenza viruses isolated from China. These H5N6 viruses were able to replicate in mice without prior adaptation. Our results show that continued circulation of these viruses could endanger humans.
Collapse
Affiliation(s)
- Xueliang Cao
- Animal Husbandry and Veterinary Institute, Zhejiang Academy of Agricultural Science, 198 Shiqiao Road, Hangzhou, 310021, Zhejiang, China.,Dezhou College, Dezhou, 253023, Shandong, China
| | - Fan Yang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Medicine, The First Affiliated Hospital, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, China
| | - Haibo Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Medicine, The First Affiliated Hospital, Zhejiang University, 79 Qingchun Road, Hangzhou, 310003, Zhejiang, China.
| | - Lihua Xu
- Animal Husbandry and Veterinary Institute, Zhejiang Academy of Agricultural Science, 198 Shiqiao Road, Hangzhou, 310021, Zhejiang, China.
| |
Collapse
|
21
|
Molecular Evolution and Emergence of H5N6 Avian Influenza Virus in Central China. J Virol 2017; 91:JVI.00143-17. [PMID: 28404845 DOI: 10.1128/jvi.00143-17] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 04/04/2017] [Indexed: 11/20/2022] Open
Abstract
H5N6 avian influenza virus (AIV) has posed a potential threat to public health since its emergence in China in 2013. To understand the evolution and emergence of H5N6 AIV in the avian population, we performed molecular surveillance of live poultry markets (LPMs) in Wugang Prefecture, Hunan Province, in central China, during 2014 and 2015. Wugang Prefecture is located on the Eastern Asian-Australian migratory bird flyway, and a human death due to an H5N6 virus was reported in the prefecture on 21 November 2016. In total, we sampled and sequenced the complete genomes of 175 H5N6 AIVs. Notably, our analysis revealed that H5N6 AIVs contain at least six genotypes arising from segment reassortment, including a rare variant that possesses an HA gene derived from H5N1 clade 2.3.2 and a novel NP gene that has its origins with H7N3 viruses. In addition, phylogenetic analysis revealed that genetically similar H5N6 AIVs tend to cluster according to their geographic regions of origin. These results help to reveal the evolutionary behavior of influenza viruses prior to their emergence in humans.IMPORTANCE The newly emerged H5N6 influenza A virus has caused more than 10 human deaths in China since 2013. In November 2016, a human death due to an H5N6 virus, in Wugang Prefecture, Hunan Province, was confirmed by the WHO. To better understand the evolution and emergence of H5N6 viruses, we surveyed live poultry markets (LPMs) in Wugang Prefecture before the reported human death, with a focus on revealing the diversity and genomic origins of H5N6 in birds during 2014 and 2015. In general, H5N6 viruses in this region were most closely related to H5N1 clade 2.3.4.4, with the exception of one virus with an HA gene derived from clade 2.3.2 such that it represents a novel reassortant. Clearly, the ongoing surveillance of LPMs is central to monitoring the emergence of pathogenic influenza viruses.
Collapse
|
22
|
Wu H, Lu R, Peng X, Peng X, Cheng L, Liu F, Wu N. Characterization of Novel Reassortant Influenza A (H5N2) Viruses Isolated from Poultry in Eastern China, 2015. Front Microbiol 2017; 8:741. [PMID: 28487690 PMCID: PMC5403823 DOI: 10.3389/fmicb.2017.00741] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 04/10/2017] [Indexed: 11/13/2022] Open
Abstract
Recently, novel variants of H5 highly pathogenic avian influenza viruses (AIVs) have been frequently isolated from poultry and wild birds in Asia, Europe and North America. Live poultry markets (LPMs) play an important role in the dissemination of influenza viruses. Four H5N2 AIVs were isolated from poultry during surveillance of AIVs in LPMs in Eastern China, in 2015. Whole-genome sequencing, combined with phylogenetic and antigenic analyses were performed to characterize these viruses. These H5N2 viruses had undergone extensive reassortment resulting in two genetic groups of viruses in poultry. These viruses exhibited slightly pathogenicity in mice, and replicated without prior adaptation. The continued circulation of these novel H5N2 viruses may represent a threat to human health.
Collapse
Affiliation(s)
- Haibo Wu
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, China
| | - Rufeng Lu
- Department of Emergency, the First Affiliated Hospital of Zhejiang Chinese Medical UniversityHangzhou, China
| | - Xiuming Peng
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, China
| | - Xiaorong Peng
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, China
| | - Linfang Cheng
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, China
| | - Fumin Liu
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, China
| | - Nanping Wu
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, the First Affiliated Hospital, School of Medicine, Zhejiang UniversityHangzhou, China
| |
Collapse
|
23
|
Diversity, evolution and population dynamics of avian influenza viruses circulating in the live poultry markets in China. Virology 2017; 505:33-41. [PMID: 28222327 DOI: 10.1016/j.virol.2017.02.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 02/13/2017] [Accepted: 02/13/2017] [Indexed: 12/22/2022]
Abstract
Live poultry markets (LPMs) are an important source of novel avian influenza viruses (AIV). During 2015-2016 we surveyed AIV diversity in ten LPMs in Hubei, Zhejiang and Jiangxi provinces, China. A high diversity and prevalence of AIVs (totaling 12 subtypes) was observed in LPMs in these provinces. Strikingly, however, the subtypes discovered during 2015-2016 were markedly different to those reported by us in these same localities one year previously, suggesting a dynamic shift in viral genetic diversity over the course of a single year. Phylogenetic analyses revealed frequent reassortment, including between high and low pathogenic AIV subtypes and among those that circulate in domestic and wild birds. Notably, the novel H5N6 reassortant virus, which contains a set of H9N2-like internal genes, was prevalent in all three regions surveyed. Overall, these data highlight the profound changes in genetic diversity and in patterns of reassortment in those AIVs that circulate in LPMs.
Collapse
|
24
|
Genetic Predisposition To Acquire a Polybasic Cleavage Site for Highly Pathogenic Avian Influenza Virus Hemagglutinin. mBio 2017; 8:mBio.02298-16. [PMID: 28196963 PMCID: PMC5312086 DOI: 10.1128/mbio.02298-16] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Highly pathogenic avian influenza viruses with H5 and H7 hemagglutinin (HA) subtypes evolve from low-pathogenic precursors through the acquisition of multiple basic amino acid residues at the HA cleavage site. Although this mechanism has been observed to occur naturally only in these HA subtypes, little is known about the genetic basis for the acquisition of the polybasic HA cleavage site. Here we show that consecutive adenine residues and a stem-loop structure, which are frequently found in the viral RNA region encoding amino acids around the cleavage site of low-pathogenic H5 and H7 viruses isolated from waterfowl reservoirs, are important for nucleotide insertions into this RNA region. A reporter assay to detect nontemplated nucleotide insertions and deep-sequencing analysis of viral RNAs revealed that an increased number of adenine residues and enlarged stem-loop structure in the RNA region accelerated the multiple adenine and/or guanine insertions required to create codons for basic amino acids. Interestingly, nucleotide insertions associated with the HA cleavage site motif were not observed principally in the viral RNA of other subtypes tested (H1, H2, H3, and H4). Our findings suggest that the RNA editing-like activity is the key mechanism for nucleotide insertions, providing a clue as to why the acquisition of the polybasic HA cleavage site is restricted to the particular HA subtypes. Influenza A viruses are divided into subtypes based on the antigenicity of the viral surface glycoproteins hemagglutinin (HA) and neuraminidase. Of the 16 HA subtypes (H1 to -16) maintained in waterfowl reservoirs of influenza A viruses, H5 and H7 viruses often become highly pathogenic through the acquisition of multiple basic amino acid residues at the HA cleavage site. Although this mechanism has been known since the 1980s, the genetic basis for nucleotide insertions has remained unclear. This study shows the potential role of the viral RNA secondary structure for nucleotide insertions and demonstrates a key mechanism explaining why the acquisition of the polybasic HA cleavage site is restricted to particular HA subtypes in nature. Our findings will contribute to better understanding of the ecology of influenza A viruses and will also be useful for the development of genetically modified vaccines against H5 and H7 influenza A viruses with increased stability.
Collapse
|
25
|
Oliveira Cavalcanti M, Vaughn E, Capua I, Cattoli G, Terregino C, Harder T, Grund C, Vega C, Robles F, Franco J, Darji A, Arafa AS, Mundt E. A genetically engineered H5 protein expressed in insect cells confers protection against different clades of H5N1 highly pathogenic avian influenza viruses in chickens. Avian Pathol 2017; 46:224-233. [PMID: 27807985 DOI: 10.1080/03079457.2016.1250866] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The evolution of highly pathogenic H5N1 avian influenza viruses (HPAI-H5N1) has resulted in the appearance of a number of diverse groups of HPAI-H5N1 based on the presence of genetically similar clusters of their haemagglutinin sequences (clades). An H5 antigen encoded by a recombinant baculovirus and expressed in insect cells was used for oil-emulsion-based vaccine prototypes. In several experiments, vaccination was performed at 10 days of age, followed by challenge infection on day 21 post vaccination (PV) with HPAI-H5N1 clades 2.2, 2.2.1, and 2.3.2. A further challenge infection with HPAI-H5N1 clade 2.2.1 was performed at day 42 PV. High haemagglutination inhibition titres were observed for the recH5 vaccine antigen, and lower haemagglutination inhibition titres for the challenge virus antigens. Nevertheless, the rate of protection from mortality and clinical signs was 100% when challenged at 21 days PV and 42 days PV, indicating protection over the entire broiler chicken rearing period without a second vaccination. The unvaccinated control chickens mostly died between two and five days after challenge infection. A low level of viral RNA was detected by reverse transcription followed by a quantitative polymerase chain reaction in a limited number of birds for a short period after challenge infection, indicating a limited spread of HPAI-H5N1 at flock level. Furthermore, it was observed that the vaccine can be used in a differentiation infected from vaccinated animals (DIVA) approach, based on the detection of nucleoprotein antibodies in vaccinated/challenged chickens. The vaccine fulfilled all expectations of an inactivated vaccine after one vaccination against challenge with different clades of H5N1-HPAI and is suitable for a DIVA approach.
Collapse
Affiliation(s)
| | - Eric Vaughn
- b Boehringer Ingelheim Vetmedica, Inc. , Ames , IA , USA
| | - Ilaria Capua
- c OIE/FAO and National Reference Laboratory for Newcastle Disease and Avian Influenza , Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università , Legnaro , Italy
| | - Giovanni Cattoli
- c OIE/FAO and National Reference Laboratory for Newcastle Disease and Avian Influenza , Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università , Legnaro , Italy
| | - Calogero Terregino
- c OIE/FAO and National Reference Laboratory for Newcastle Disease and Avian Influenza , Istituto Zooprofilattico Sperimentale delle Venezie, Viale dell'Università , Legnaro , Italy
| | - Timm Harder
- d Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health , Greifswald-Insel Riems , Germany
| | - Christian Grund
- d Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health , Greifswald-Insel Riems , Germany
| | - Carlos Vega
- e Boehringer Ingelheim Vetmedica, S.A. de C.V , Guadalajara , Mexico
| | - Francisco Robles
- e Boehringer Ingelheim Vetmedica, S.A. de C.V , Guadalajara , Mexico
| | - Julio Franco
- e Boehringer Ingelheim Vetmedica, S.A. de C.V , Guadalajara , Mexico
| | - Ayub Darji
- f Centre de Recerca en Sanitat Animal , CReSA, UAB-IRTA , Barcelona , Spain
| | - Abdel-Satar Arafa
- g National Laboratory for Veterinary Quality Control on Poultry Production , Animal Health Research Institute , Giza , Egypt
| | - Egbert Mundt
- a Boehringer Ingelheim Veterinary Research Center , Hannover , Germany
| |
Collapse
|
26
|
Molecular characterization of a novel reassortant H7N6 subtype avian influenza virus from poultry in Eastern China, in 2016. Arch Virol 2017; 162:1341-1347. [PMID: 28105530 DOI: 10.1007/s00705-017-3219-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 11/28/2016] [Indexed: 01/13/2023]
Abstract
During the surveillance for avian influenza viruses (AIVs) in live poultry markets in Eastern China, in 2016, a novel reassortant H7N6 AIV was isolated from a chicken. Phylogenetic analysis showed that this strain received its genes from H9N2, H7N9 and H5N6 AIVs infecting poultry in China. This strain showed moderate pathogenicity in mice and was able to replicate in mice without prior adaptation. Considering that this novel reassorted H7N6 virus was isolated from poultry in this study, it is possible that chickens play an important role in the generation of novel reassorted H7N6 AIVs.
Collapse
|
27
|
Novel Reassortant H5N6 Influenza A Virus from the Lao People's Democratic Republic Is Highly Pathogenic in Chickens. PLoS One 2016; 11:e0162375. [PMID: 27631618 PMCID: PMC5025169 DOI: 10.1371/journal.pone.0162375] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 08/22/2016] [Indexed: 01/31/2023] Open
Abstract
Avian influenza viruses of H5 subtype can cause highly pathogenic disease in poultry. In March 2014, a new reassortant H5N6 subtype highly pathogenic avian influenza virus emerged in Lao People’s Democratic Republic. We have assessed the pathogenicity, pathobiology and immunological responses associated with this virus in chickens. Infection caused moderate to advanced disease in 6 of 6 chickens within 48 h of mucosal inoculation. High virus titers were observed in blood and tissues (kidney, spleen, liver, duodenum, heart, brain and lung) taken at euthanasia. Viral antigen was detected in endothelium, neurons, myocardium, lymphoid tissues and other cell types. Pro-inflammatory cytokines were elevated compared to non-infected birds. Our study confirmed that this new H5N6 reassortant is highly pathogenic, causing disease in chickens similar to that of Asian H5N1 viruses, and demonstrated the ability of such clade 2.3.4-origin H5 viruses to reassort with non-N1 subtype viruses while maintaining a fit and infectious phenotype. Recent detection of influenza H5N6 poultry infections in Lao PDR, China and Viet Nam, as well as six fatal human infections in China, demonstrate that these emergent highly pathogenic H5N6 viruses may be widely established in several countries and represent an emerging threat to poultry and human populations.
Collapse
|
28
|
Li K, Liu H, Yang Z, Li T, Di B, Chen Z, Lu J, Chen G, Zhao P, Yang L, Su W, Xiao X, Luo L, Li W, Lin C, Li G, Mei X, Tang X, Wang M, Zheng B. Clinical and epidemiological characteristics of a patient infected with H5N6 avian influenza A virus. J Clin Virol 2016; 82:20-26. [DOI: 10.1016/j.jcv.2016.06.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 06/09/2016] [Accepted: 06/10/2016] [Indexed: 12/09/2022]
|
29
|
Fang S, Bai T, Yang L, Wang X, Peng B, Liu H, Geng Y, Zhang R, Ma H, Zhu W, Wang D, Cheng J, Shu Y. Sustained live poultry market surveillance contributes to early warnings for human infection with avian influenza viruses. Emerg Microbes Infect 2016; 5:e79. [PMID: 27485495 PMCID: PMC5034097 DOI: 10.1038/emi.2016.75] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 04/22/2016] [Accepted: 05/12/2016] [Indexed: 12/27/2022]
Abstract
Sporadic human infections with the highly pathogenic avian influenza (HPAI) A (H5N6) virus have been reported in different provinces in China since April 2014. From June 2015 to January 2016, routine live poultry market (LPM) surveillance was conducted in Shenzhen, Guangdong Province. H5N6 viruses were not detected until November 2015. The H5N6 virus-positive rate increased markedly beginning in December 2015, and viruses were detected in LPMs in all districts of the city. Coincidently, two human cases with histories of poultry exposure developed symptoms and were diagnosed as H5N6-positive in Shenzhen during late December 2015 and early January 2016. Similar viruses were identified in environmental samples collected in the LPMs and the patients. In contrast to previously reported H5N6 viruses, viruses with six internal genes derived from the H9N2 or H7N9 viruses were detected in the present study. The increased H5N6 virus-positive rate in the LPMs and the subsequent human infections demonstrated that sustained LPM surveillance for avian influenza viruses provides an early warning for human infections. Interventions, such as LPM closures, should be immediately implemented to reduce the risk of human infection with the H5N6 virus when the virus is widely detected during LPM surveillance.
Collapse
Affiliation(s)
- Shisong Fang
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Tian Bai
- National Institute for Viral Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory for Medical Virology, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Lei Yang
- National Institute for Viral Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory for Medical Virology, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Xin Wang
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Bo Peng
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Hui Liu
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Yijie Geng
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Renli Zhang
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Hanwu Ma
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Wenfei Zhu
- National Institute for Viral Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory for Medical Virology, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Dayan Wang
- National Institute for Viral Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory for Medical Virology, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Jinquan Cheng
- Major Infectious Disease Control Key Laboratory, Key Reference Laboratory of Pathogen and Biosafety, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Yuelong Shu
- National Institute for Viral Disease Control and Prevention, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Key Laboratory for Medical Virology, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| |
Collapse
|
30
|
Highly Pathogenic Avian Influenza H5N6 Viruses Exhibit Enhanced Affinity for Human Type Sialic Acid Receptor and In-Contact Transmission in Model Ferrets. J Virol 2016; 90:6235-6243. [PMID: 27122581 DOI: 10.1128/jvi.00127-16] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 04/21/2016] [Indexed: 12/11/2022] Open
Abstract
UNLABELLED Since May 2014, highly pathogenic avian influenza H5N6 virus has been reported to cause six severe human infections three of which were fatal. The biological properties of this subtype, in particular its relative pathogenicity and transmissibility in mammals, are not known. We characterized the virus receptor-binding affinity, pathogenicity, and transmissibility in mice and ferrets of four H5N6 isolates derived from waterfowl in China from 2013-2014. All four H5N6 viruses have acquired a binding affinity for human-like SAα2,6Gal-linked receptor to be able to attach to human tracheal epithelial and alveolar cells. The emergent H5N6 viruses, which share high sequence similarity with the human isolate A/Guangzhou/39715/2014 (H5N6), were fully infective and highly transmissible by direct contact in ferrets but showed less-severe pathogenicity than the parental H5N1 virus. The present results highlight the threat of emergent H5N6 viruses to poultry and human health and the need to closely track their continual adaptation in humans. IMPORTANCE Extended epizootics and panzootics of H5N1 viruses have led to the emergence of the novel 2.3.4.4 clade of H5 virus subtypes, including H5N2, H5N6, and H5N8 reassortants. Avian H5N6 viruses from this clade have caused three fatalities out of six severe human infections in China since the first case in 2014. However, the biological properties of this subtype, especially the pathogenicity and transmission in mammals, are not known. Here, we found that natural avian H5N6 viruses have acquired a high affinity for human-type virus receptor. Compared to the parental clade 2.3.4 H5N1 virus, emergent H5N6 isolates showed less severe pathogenicity in mice and ferrets but acquired efficient in-contact transmission in ferrets. These findings suggest that the threat of avian H5N6 viruses to humans should not be ignored.
Collapse
|
31
|
Xu W, Li X, Bai T, Zhao X, Zhao X, Zhang Y, Guo J, Li Z, Yang L, Wang D, Shu Y. A fatal case of infection with a further reassortant, highly pathogenic avian influenza (HPAI) H5N6 virus in Yunnan, China. INFECTION GENETICS AND EVOLUTION 2016; 40:63-66. [DOI: 10.1016/j.meegid.2016.02.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 02/14/2016] [Accepted: 02/17/2016] [Indexed: 12/09/2022]
|
32
|
Co-circulation of H5N6, H3N2, H3N8, and Emergence of Novel Reassortant H3N6 in a Local Community in Hunan Province in China. Sci Rep 2016; 6:25549. [PMID: 27151540 PMCID: PMC4858758 DOI: 10.1038/srep25549] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 04/19/2016] [Indexed: 12/15/2022] Open
Abstract
Multiple infections of avian influenza viruses (AIVs) in poultry or wild birds contribute to the continued evolution of H5 subtype viruses in nature and provide potential recombination of AIVs of different origins. In this study, we carried out surveillance of AIVs in ducks, geese and the environment of a community in Hunan province, China, from 2014–2015. We isolated multiple co-circulated AIVs including H3N2, H3N8, and H5N6, and, most importantly, a novel reassortant: H3N6. Phylogenetic analyses suggest that H3N6 is highly likely derived from H5N6, which has recently been shown to have zoonotic potential with human infections. Studies with mammalian cell lines and a mouse model indicate that four selected AIVs of duck or goose origin can infect MDCK and A549 cells but have low pathogenicity in mice. We propose that a potential co-circulation of multiple subtypes including H5N6 in local area may result in the production of novel subtypes such as H3N6 by gene reassortment.
Collapse
|
33
|
Isolation and genetic characterization of novel reassortant H6N6 subtype avian influenza viruses isolated from chickens in eastern China. Arch Virol 2016; 161:1859-72. [PMID: 27101069 DOI: 10.1007/s00705-016-2861-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 04/07/2016] [Indexed: 10/21/2022]
Abstract
H6 subtype avian influenza viruses (AIVs) possess the ability to cross the species barrier to infect mammals and pose a threat to human health. From June 2014 to July 2015, 12 H6N6 AIVs were isolated from chickens in live-poultry markets in Zhejiang Province, Eastern China. Phylogenetic analysis showed that these isolates received their genes from H6 and H9N2 subtype AIVs of poultry in China. These novel reassortant viruses showed moderate pathogenicity in mice and were able to replicate in mice without prior adaptation. Considering that novel reassorted H6N6 viruses were isolated from chickens in this study, it is possible that these chickens play an important role in the generation of novel reassorted H6N6 AIVs, and these results emphasize the need for continued surveillance of the H6N6 AIVs circulating in poultry.
Collapse
|
34
|
Yuan R, Wang Z, Kang Y, Wu J, Zou L, Liang L, Song Y, Zhang X, Ni H, Lin J, Ke C. Continuing Reassortant of H5N6 Subtype Highly Pathogenic Avian Influenza Virus in Guangdong. Front Microbiol 2016; 7:520. [PMID: 27148209 PMCID: PMC4829614 DOI: 10.3389/fmicb.2016.00520] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 03/29/2016] [Indexed: 11/13/2022] Open
Abstract
First identified in May 2014 in China's Sichuan Province, initial cases of H5N6 avian influenza virus (AIV) infection in humans raised great concerns about the virus's prevalence, origin, and development. To evaluate both AIV contamination in live poultry markets (LPMs) and the risk of AIV infection in humans, we have conducted surveillance of LPMs in Guangdong Province since 2013 as part of environmental sampling programs. With environmental samples associated with these LPMs, we performed genetic and phylogenetic analyses of 10 H5N6 AIVs isolated from different cities of Guangdong Province from different years. Results revealed that the H5N6 viruses were reassortants with hemagglutinin (HA) genes derived from clade 2.3.4.4 of H5-subtype AIV, yet neuraminidase (NA) genes derived from H6N6 AIV. Unlike the other seven H5N6 viruses isolated in first 7 months of 2014, all of which shared remarkable sequence similarity with the H5N1 AIV in all internal genes, the PB2 genes of GZ693, GZ670, and ZS558 more closely related to H6N6 AIV and the PB1 gene of GZ693 to the H3-subtype AIV. Phylogenetic analyses revealed that the environmental H5N6 AIV related closely to human H5N6 AIVs isolated in Guangdong. These results thus suggest that continued reassortment has enabled the emergence of a novel H5N6 virus in Guangdong, as well as highlight the potential risk of highly pathogenic H5N6 AIVs in the province.
Collapse
Affiliation(s)
- Runyu Yuan
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China; Key Laboratory of Zoonosis Prevention and Control of Guangdong, College of Veterinary Medicine, South China Agricultural UniversityGuangzhou, China
| | - Zheng Wang
- School of Public Health, Sun Yat-Sen University Guangzhou, China
| | - Yinfeng Kang
- Key Laboratory of Zoonosis Prevention and Control of Guangdong, College of Veterinary Medicine, South China Agricultural University Guangzhou, China
| | - Jie Wu
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Lirong Zou
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Lijun Liang
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Yingchao Song
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Xin Zhang
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Hanzhong Ni
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Jinyan Lin
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| | - Changwen Ke
- Key Laboratory for Repository and Application of Pathogenic Microbiology, Research Center for Pathogens Detection Technology of Emerging Infectious Diseases, Guangdong Provincial Center for Disease Control and PreventionGuangzhou, China; WHO Collaborating Centre for Surveillance, Research and Training of Emerging Infectious DiseaseGuangzhou, China
| |
Collapse
|
35
|
Huang G. Artificial infectious disease optimization: A SEIQR epidemic dynamic model-based function optimization algorithm. SWARM AND EVOLUTIONARY COMPUTATION 2016; 27:31-67. [PMID: 32288989 PMCID: PMC7104270 DOI: 10.1016/j.swevo.2015.09.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 08/05/2015] [Accepted: 09/21/2015] [Indexed: 05/04/2023]
Abstract
To solve some complicated function optimization problems, an artificial infectious disease optimization algorithm based on the SEIQR epidemic model is constructed, it is called as the SEIQR algorithm, or SEIQRA in short. The algorithm supposes that some human individuals exist in an ecosystem; each individual is characterized by a number of features; an infectious disease (SARS) exists in the ecosystem and spreads among individuals, the disease attacks only a part of features of an individual. Each infected individual may pass through such states as susceptibility (S), exposure (E), infection (I), quarantine (Q) and recovery (R). State S, E, I, Q and R can automatically and dynamically divide all people in the ecosystem into five classes, it provides the diversity for SEIQRA; that people can be attacked by the infectious disease and then transfer it to other people can cause information exchange among people, information exchange can make a person to transit from one state to another; state transitions can be transformed into operators of SEIQRA; the algorithm has 13 legal state transitions, which corresponds to 13 operators; the transmission rules of the infectious disease among people is just the logic to control state transitions of individuals among S, E, I, Q and R, it is just the synergy of SEIQRA, the synergy can be transformed into the logic structure of the algorithm. The 13 operators in the algorithm provide a native opportunity to integrate many operations with different purposes; these operations include average, differential, expansion, chevy, reflection and crossover. The 13 operators are executed equi-probably; a stable heart rhythm of the algorithm is realized. Because the infectious disease can only attack a small part of organs of a person when it spreads among people, the part variables iteration strategy (PVI) can be ingeniously applied, thus enabling the algorithm to possess of high performance of computation, high suitability for solving some kinds of complicated optimization problems, especially high dimensional optimization problems. Results show that SEIQRA has characteristics of strong search capability and global convergence, and has a high convergence speed for some complicated functions optimization problems.
Collapse
Affiliation(s)
- Guangqiu Huang
- School of Management, Xi'an University of Architecture and Technology, Xi'an 710055, China
| |
Collapse
|
36
|
Peng X, Wu H, Peng X, Wu X, Cheng L, Liu F, Ji S, Wu N. Amino acid substitutions occurring during adaptation of an emergent H5N6 avian influenza virus to mammals. Arch Virol 2016; 161:1665-70. [PMID: 26997612 DOI: 10.1007/s00705-016-2826-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 03/13/2016] [Indexed: 12/15/2022]
Abstract
Avian influenza viruses (AIVs) are known to cross species barriers, and emergent highly pathogenic H5N6 AIVs pose a serious threat to human health and the poultry industry. Here, we serially passaged an H5N6 virus 10 times in BALB/c mice. The pathogenicity of the wild-type 6D2 (WT-6D2) and mammal-adapted 6D2 strain (MA-6D2) were compared. The viral titer in multiple organs and the death rate for MA-6D2 were significantly higher than for WT-6D2. We provide evidence that the mutations HA A150V, NA R143K and G147E, PB2 E627K, and PA A343T may be important for adaptation of H5N6 AIVs to mammals.
Collapse
Affiliation(s)
- Xiuming Peng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Haibo Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Xiaorong Peng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Xiaoxin Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Linfang Cheng
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Fumin Liu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Shujing Ji
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China
| | - Nanping Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310003, China.
| |
Collapse
|
37
|
Emergence and dissemination of clade 2.3.4.4 H5Nx influenza viruses-how is the Asian HPAI H5 lineage maintained. Curr Opin Virol 2016; 16:158-163. [PMID: 26991931 DOI: 10.1016/j.coviro.2016.02.005] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Accepted: 02/18/2016] [Indexed: 12/29/2022]
Abstract
Highly pathogenic avian influenza (HPAI) A(H5N1) viruses containing the A/goose/Guangdong/96-like (GD/96) HA genes circulated in birds from four continents in the course of 2015 (Jan to Sept). A new HA clade, termed 2.3.4.4, emerged around 2010-2011 in China and revealed a novel propensity to reassort with NA subtypes other than N1, unlike dozens of earlier clades. Two subtypes, H5N6 and H5N8, have spread to countries in Asia (H5N6), Europe and North America (H5N8). Infections by clade 2.3.4.4 viruses are characterized by low virulence in poultry and some wild birds, contributing to wide geographical dissemination of the viruses via poultry trade and wild bird migration.
Collapse
|
38
|
Clinical, epidemiological and virological characteristics of the first detected human case of avian influenza A(H5N6) virus. INFECTION GENETICS AND EVOLUTION 2016; 40:236-242. [PMID: 26973295 DOI: 10.1016/j.meegid.2016.03.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Revised: 02/28/2016] [Accepted: 03/09/2016] [Indexed: 02/03/2023]
Abstract
A human infection with novel avian influenza A H5N6 virus emerged in Changsha city, China in February, 2014. This is the first detected human case among all human cases identified from 2014 to early 2016. We obtained and summarized clinical, epidemiological, and virological data from this patient. Complete genome of the virus was determined and compared to other avian influenza viruses via the construction of phylogenetic trees using the neighbor-joining approach. A girl aged five and half years developed fever and mild respiratory symptoms on Feb. 16, 2014 and visited hospital on Feb. 17. Throat swab specimens were obtained from the patient and a novel reassortant avian influenza A H5N6 virus was detected. All eight viral gene segments were of avian origin. The hemagglutinin (HA) and neuraminidase (NA) gene segments were closely related to A/duck/Sichuan/NCXN11/2014(H5N1) and A/chicken/Jiangxi/12782/2014(H10N6) viruses, respectively. The six internal genes were homologous to avian influenza A (H5N2) viruses isolated in duck from Jiangxi in China. This H5N6 virus has not gained genetic mutations necessary for human infection and was suggested to be sensitive to neuraminidase inhibitors, but resistant to adamantanes. Epidemiological investigation of the exposure history of the patient found that a live poultry market could be the source place of infection and the incubation period was 2-5days. This novel reassortant Avian influenza A(H5N6) virus could be low pathogenic in humans. The prevalence and genetic evolution of this virus should be closely monitored.
Collapse
|
39
|
Chen LJ, Lin XD, Guo WP, Tian JH, Wang W, Ying XH, Wang MR, Yu B, Yang ZQ, Shi M, Holmes EC, Zhang YZ. Diversity and evolution of avian influenza viruses in live poultry markets, free-range poultry and wild wetland birds in China. J Gen Virol 2016; 97:844-854. [PMID: 26758561 DOI: 10.1099/jgv.0.000399] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The wide circulation of novel avian influenza viruses (AIVs) highlights the risk of pandemic influenza emergence in China. To investigate the prevalence and genetic diversity of AIVs in different ecological contexts, we surveyed AIVs in live poultry markets (LPMs), free-range poultry and the wetland habitats of wild birds in Zhejiang and Hubei provinces. Notably, LPMs contained the highest frequency of AIV infection, and the greatest number of subtypes (n = 9) and subtype co-infections (n = 14), as well as frequent reassortment, suggesting that they play an active role in fuelling AIV transmission. AIV-positive samples were also identified in wild birds in both provinces and free-range poultry in one sampling site close to a wetland region in Hubei. H9N2, H7N9 and H5N1 were the most commonly sampled subtypes in the LPMs from Zhejiang, whilst H5N6 and H9N2 were the dominant subtypes in the LPMs from Hubei. Phylogenetic analyses of the whole-genome sequences of 43 AIVs revealed that three reassortant H5 subtypes were circulating in LMPs in both geographical regions. Notably, the viruses sampled from the wetland regions and free-range poultry contained complex reassortants, for which the origins of some segments were unclear. Overall, our study highlights the extent of AIV genetic diversity in two highly populated parts of central and south-eastern China, particularly in LPMs, and emphasizes the need for continual surveillance.
Collapse
Affiliation(s)
- Liang-Jun Chen
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Changping, 102206, Beijing, PRChina.,School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, PRChina.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, Zhejiang Province, PRChina
| | - Xian-Dan Lin
- Wenzhou Center for Disease Control and Prevention, Wenzhou, 325001, Zhejiang Province, PRChina
| | - Wen-Ping Guo
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Changping, 102206, Beijing, PRChina.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, Zhejiang Province, PRChina
| | - Jun-Hua Tian
- Wenzhou Center for Disease Control and Prevention, Wuhan, 430015, Hubei Province, PRChina
| | - Wen Wang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Changping, 102206, Beijing, PRChina.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, Zhejiang Province, PRChina
| | - Xu-Hua Ying
- Yuhuan Center for Disease Control and Prevention, Yuhuan, 317600, Zhejiang Province, PRChina
| | - Miao-Ruo Wang
- Longquan Center for Disease Control and Prevention, Longquan, Zhejiang Province, PRChina
| | - Bin Yu
- Wenzhou Center for Disease Control and Prevention, Wuhan, 430015, Hubei Province, PRChina
| | - Zhan-Qiu Yang
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, PRChina
| | - Mang Shi
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Changping, 102206, Beijing, PRChina.,Marie Bashir Institute for Infectious Diseases and Biosecurity, Charles Perkins Centre, School of Biological Sciences and Sydney Medical School, The University of Sydney, Sydney, NSW 2006, Australia
| | - Edward C Holmes
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Changping, 102206, Beijing, PRChina.,Marie Bashir Institute for Infectious Diseases and Biosecurity, Charles Perkins Centre, School of Biological Sciences and Sydney Medical School, The University of Sydney, Sydney, NSW 2006, Australia
| | - Yong-Zhen Zhang
- State Key Laboratory of Infectious Disease Prevention and Control, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Changping, 102206, Beijing, PRChina.,Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Hangzhou, Zhejiang Province, PRChina.,School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, PRChina
| |
Collapse
|
40
|
Characterization of clade 2.3.4.4 highly pathogenic H5 avian influenza viruses in ducks and chickens. Vet Microbiol 2016; 182:116-22. [DOI: 10.1016/j.vetmic.2015.11.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 10/31/2015] [Accepted: 11/04/2015] [Indexed: 11/22/2022]
|
41
|
Genetic and molecular characterization of H9N2 and H5 avian influenza viruses from live poultry markets in Zhejiang Province, eastern China. Sci Rep 2015; 5:17508. [PMID: 26627108 PMCID: PMC4667249 DOI: 10.1038/srep17508] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 10/30/2015] [Indexed: 12/16/2022] Open
Abstract
Live poultry markets (LPMs) are a key source of reassorted avian influenza viruses (AIVs) because of the density of terrestrial and aquatic poultry and the frequency of AIV infection. H9N2 viruses are prevalent in terrestrial poultry throughout Asia and have been isolated from poultry outbreaks worldwide. They infect both avian and mammalian species and may be significant donors of genetic material to emerging human pathogens. LPMs in Zhejiang Province were surveyed from 2013–2014 for AIVs. Three hundred seventy-four (374) AIV strains were isolated from 3,328 samples. Whole–genome sequencing and phylogenetic analyses were performed. We identified a novel H9N2 virus genotype that had undergone reassortment with gene segments from Qa/HK/G1/97–like, Ck/BJ/1/94–like, and Dk/HK/Y439/97–like viruses. Phylogenetic analyses suggested the H9N2 viruses had undergone reassortments with other AIV subtypes. The results also suggested that two different clades (2.3.2 and 2.3.4.6) of H5 viruses were co–circulating in Zhejiang Province. Given that reassorted H5 AIVs were detected in geese and ducks, it is possible that apparently healthy birds contribute to emerging H5 AIVs. Continued surveillance is required in poultry in eastern China.
Collapse
|
42
|
Li X, Fu Y, Yang J, Guo J, He J, Guo J, Weng S, Jia Y, Liu B, Li X, Zhu Q, Chen H. Genetic and biological characterization of two novel reassortant H5N6 swine influenza viruses in mice and chickens. INFECTION GENETICS AND EVOLUTION 2015; 36:462-466. [DOI: 10.1016/j.meegid.2015.08.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Revised: 08/13/2015] [Accepted: 08/14/2015] [Indexed: 01/16/2023]
|
43
|
Wiwanitkit V. Human H5N6 Influenza Virus Infection: New Disease Outbreak. RAZAVI INTERNATIONAL JOURNAL OF MEDICINE 2015. [DOI: 10.17795/rijm28855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
44
|
Neumann G. H5N1 influenza virulence, pathogenicity and transmissibility: what do we know? Future Virol 2015; 10:971-980. [PMID: 26617665 DOI: 10.2217/fvl.15.62] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Highly pathogenic influenza viruses of the H5N1 subtype have infected more than 600 people since 1997, resulting in the deaths of approximately 60% of those infected. Multiple studies have established the viral hemagglutinin (HA) surface glycoprotein as the major determinant of H5N1 virulence. HA mediates host-specific virus binding to cells, and mutations that allow efficient binding to viral receptors on mammalian cells are critical (although not sufficient) for H5N1 transmissibility among mammals. The viral polymerase PB2 protein is also a critical virulence determinant, and adaptive mutations in this protein are crucial for efficient H5N1 virus replication in mammals. Additionally, viral proteins (such as NS1 and PB1-F2) with roles in innate immune responses also affect the virulence of highly pathogenic H5N1 viruses.
Collapse
Affiliation(s)
- Gabriele Neumann
- Influenza Research Institute, Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, 575 Science Drive, Madison, WI 53711, USA; Tel.: +1 608 890 2907; ;
| |
Collapse
|