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Pathogenic Characterization and Full Length Genome Sequence of a reassortant Infectious Bursal Disease Virus Newly Isolated in Pakistan

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Virologica Sinica 2019年第1期34卷 102-105页

作者： Altaf Hussain Tiantian Wu Hui Li Linjin Fan Kai Li Li Gao Yongqiang Wang Yulong Gao Changjun Liu Hongyu Cui Qing Pan Yanping Zhang Asim Aslam Khan Muti-Ur-Rehman Muhammad Munir Salman Latif Butt Xiaomei Wang Xiaole Qi Division of Avian Infectious Diseases State Key Laboratory of Veterinary BiotechnologyHarbin Veterinary Research InstituteThe Chinese Academy of Agricultural Sciences OIE Reference Laboratory for Infectious Bursal Disease Pathology Department University of Veterinary and Animal Sciences Division of Biomedical and Life Sciences Faculty of Health and MedicineLancaster University Department of Pathology College of Veterinary MedicineUniversity of Georgia Jiangsu Co-innovation Centre for Prevention and Control of Important Animal Infectious Disease and Zoonoses

Dear Editor,Infectious bursal disease (IBD) is one of the most important diseases of the poultry. The IBD virus (IBDV), a nonenveloped virus belonging to the Birnaviridae family with a genome consisting of two segments of double-stranded RNA (segments A and B), targets B lymphocytes of bursa of Fabricious leading to immunosuppression. In Pakistan,poultry farming is the second biggest industry and IBD is the second biggest disease threating the poultry sector.However.

关键词： In Pathogenic Characterization and Full Length Genome Sequence of a reassortant Infectious Bursal Disease Virus Newly Isolated in Pakistan

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Detection of reassortant avian influenza A (H11N9) virus in environmental samples from live poultry markets in China

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Infectious Diseases of Poverty 2016年第1期5卷 499-504页

作者： Ye Zhang Shu-Mei Zou Xiao-Dan Li Li-Bo Dong Hong Bo Rong-Bao Gao Da-Yan Wang Yue-Long Shu National Institute for Viral Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijing 102206China Key Laboratory for Medical Virology National Health and Family Planning CommissionBeijing 102206China

Background:Avian influenza viruses have caused human infection and posed the pandemic potential.Live poultry markets are considered as a source of human infection with avian influenza viruses.Avian influenza routine surveillance of live poultry markets is taken annually in China.We isolated the 2 H11N9 influenza virus from the surveillance program.To better understand the risk caused by these new viruses,we characterize the genetic and pathogenicity of the two viruses.Methods:Viral isolation was conducted with specific pathogen-free(SPF)embryonated chicken eggs.Whole genome was sequenced,and phylogenetic analysis was conducted.Results:Two H11N9 viruses were identified,with all 8 segments belonging to the Eurasian lineage.The HA,NA,M,NS and PA genes were similar to virus isolates from ducks,and the NP,PB2 and PB1 gene segments were most similar to those viruses from wild birds,indicating that the H11N9 viruses might represent reassortant viruses from poultry and wild birds.The HA receptor binding preference was avian-like,and the cleavage site sequence of HA showed low pathogenic.The NA gene showed 94.6%identity with the novel H7N9 virus that emerged in 2013.There was no drug resistance mutation in the M2 protein.The Asn30Asp and Thr215Ala substitutions in the M1 protein implied a potentially increased pathogenicity in mice.Both viruses were low-pathogenic strains,as assessed by the standards of intravenous pathogenicity index(IVPI)tests.Conclusion:Two reassortant H11N9 avian influenza viruses were detected.These viruses showed low pathogenicity to chickens in the IVPI test.Public health concern caused by the reassortant H11N9 viruses should be emphasized during the future surveillance.

关键词： Avian influenza H11N9 Genetic characterization reassortant

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The origin of a novel kind of reassortant (H1N2) of influenza A virus

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Science China(Life Sciences) 2000年第5期43卷 519-525页

作者：郭元吉祁俊林孔利群程小雯董婕王敏张烨郭俊峰吴昆昱 Institute of Virology Chinese Academy of Preventive Medicine Beijing 100052 China Centers for Diseases Control and Prevention of Shanghai Shanghai 200031 China Municipal Hygiene and Anti-epidemic Station of Shenzhen Shenzhen 580020 China

Genetic analysis of three H1N2 viruses indicated that only HA genes of H1N2 viruses were similar to that of A/Guangdong/6/91(H1N1) virus (PR8-like strain), while the other seven genes of them were similar to those of H3N2 virus circulating in man in 1995. Therefore, it could be considered that the H1N2 viruses were derived from reassortment between PR8-like strain and H3N2 virus circulating in man in 1995. However, the genomes of H1N2 viruses were very similar to each other. So the H1N2 viruses isolated in 1998 were not derived from new reassortment between PR8-like strain and H3N2 virus circulating in man in 1998, but derived from the evolution of H1N2 virus found in 1995.

关键词： influenza A virus a novel kind of reassortant origin.

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The circulation of unique reassortment strains of infectious bursal disease virus in Pakistan

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Journal of Integrative Agriculture 2020年第7期19卷 1867-1875页

作者： Altaf HUSSAIN WU Tian-tian FAN Lin-jin WANG Yu-long Farooq Khalid MUHAMMAD JIANG Nan GAO Li LI Kai GAO Yu-long LIU Chang-jun CUI Hong-yu PAN Qing ZHANG Yan-ping Asim ASLAM Khan MUTI-UR-REHMAN Muhammad Imran ARSHAD Hafiz Muhammad ABDULLAH WANG Xiao-mei QI Xiao-le Division of Avian Infectious Diseases State Key Laboratory of Veterinary BiotechnologyHarbin Veterinary Research InstituteChinese Academy of Agricultural SciencesHarbin 150069P.R.China OIE Reference Laboratory for Infectious Bursal Disease Harbin Veterinary Research InstituteChinese Academy of Agricultural SciencesHarbin 150069P.R.China Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses Yangzhou 225009P.R.China Sub-campus Toba Tek Singh University of Agriculture FaisalabadFaisalabad 38040Pakistan Pathology Department University of Veterinary and Animal SciencesLahore 54660Pakistan Institute of Microbiology University of Agriculture FaisalabadFaisalabad 38040Pakistan Department of Animal Sciences Ohio State UniversityColumbus 43210USA1

Infectious bursal disease(IBD),caused by IBD virus(IBDV),is one of the most devastating and immunosuppressive diseases of the poultry and has been a constraint on the sustainable poultry production around the globe including Pakistan.While the disease is threatening the poulty industry,the nature of predominant strains of IBDV in Pakistan remained l-defined.In this study,an epidemiology survey was conducted in the main chicken-farming regions of Pakistan.The batch of Pakistan IBDVs genes simultaneously covering both VP1 and VP2 were amplified,sequenced,and analyzed.The unique segment-reassortant IBDVs(vv-A/Uniq-B),carrying segmentA from vvIBDV and segment B from one unique ancestor,were identifed as one important type of circulating strains in Pakistan.The data also discovered the characteristic molecular features of Pakistan IBDVs,which will contribute to scientific vaccine selection and effective prevention of the disease.

关键词： infectious bursal disease virus circulating strains reassortant Pakistan

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Analysis of reassortant and intragenic recombination in Cypovirus

Analysis of reassortant and intragenic recombination in Cypo...

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中国蚕学会第十届青年学术研讨会

作者： Zhendong Zhang Chengxiang Hou Kun Gao Xudong Tang Xijie Guo School of Biotechnology Jiangsu University of Science and Technology Sericultural Research Institute Chinese Academy of Agricultural Sciences

reassortant and intragenic recombination events in cypoviruses were firstly analyzed in the present study.By analyzing genome segment sequences,the results showed that BmCPV1-YN was originated from reassortant events between BmCPV1-I and BmCPV1-SZ,S6 of BmCPV1-YN was a recombinant segment derived from the recombination event between BmCPV1-I and BmCPV1-SZ,and S10 of DpCPV1 emerged from the recombination event between BmCPV1-I and Ld CPV1.The results of this study suggest the high risk of reassortant and recombination within same CPV type and the pathogenicity and molecular epidemiology of CPVs need to be further explored.

关键词： cypovirus reassortant recombination

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