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Diversified reassortant H9N2 avian influenza viruses in chicken flocks in northern and eastern China

文献类型： 外文期刊

作者： Huang, Yanyan 1 ; Hu, Beixia 1 ; Wen, Xintian 2 ; Cao, Sanjie 2 ; Gavrilov, Boris K. 3 ; Du, Qijing 2 ; Khan, Mazhar I 1 ;

作者机构： 1.Shandong Acad Agr Sci, Inst Anim Sci & Vet Med, Jinan 250001, Shandong, Peoples R China

2.Sichuan Agr Univ, Coll Vet Med, Yaan 625014, Sichuan, Peoples R China

3.Univ Connecticut, Dept Pathobiol & Vet Sci, Storrs, CT 06269 USA

关键词： Avian influenza virus;H9N2;Phylogenetic analysis;Genotype;PB1-F2

期刊名称：VIRUS RESEARCH （ 影响因子：3.303； 五年影响因子：3.445 ）

ISSN： 0168-1702

年卷期： 2010 年 151 卷 1 期

页码：

收录情况： SCI

摘要： According to our previous study of the M genes of H9N2 avian influenza viruses (AIV) in infected chickens, A/Quail/Hong Kong/G1/97 (Cl 97)-like M genes newly emerged in northern and eastern China in addition to the existing A/chicken/Hong Kong/Y280/97 (Y280)-like lineage M genes. To systematically track the genesis and evolution of H9N2 viruses in this region, whole genome sequences of seventeen H9N2 isolates were obtained and their phylogenetic properties were determined. Phylogenetic analysis revealed several newly emerged lineages of gene segments in addition to the Y280-like and A/chicken/Shanghai/F/98(F 98)-like lineages, which are prevailing in northern and eastern China according to previous reports. Reassortments among these gene segments generated five novel genotypes of H9N2 viruses that have not been reported before in China. The emerging genotypes of H9N2 viruses in this region indicate that H9N2 virus genes undergo active evolution, particularly their internal genes, which raises concern for their likely contribution to gene reassortment and production of AlVs with new properties. Our study provides valuable insight into the prevalence of H9N2 viruses in northern and eastern China and demonstrates the need of long-term monitoring of the evolution of H9N2 AN. (C) 2010 Elsevier B.V. All rights reserved.

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