畜牧兽医学报 ›› 2016, Vol. 47 ›› Issue (4): 852-856.doi: 10.11843/j.issn.0366-6964.2016.04.027

• 研究简报 • 上一篇    

2010—2014年山东H9N2亚型禽流感病毒分离鉴定及HANA基因序列分析

王冬冬1,2,张毅2,侯广宇2,刘永举3,刘朔2,蒋文明2,李金平2,于建敏2,范丹丹1,陈文雅4,王守春4,尹燕博1*,陈继明2*   

  1. (1.青岛农业大学动物科技学院,青岛 266109;2.中国动物卫生与流行病学中心,青岛 266032;3.青岛农业大学生命科学学院,青岛 266109;4.青岛澳兰百特生物工程有限公司,青岛 266101)
  • 收稿日期:2015-09-30 出版日期:2016-04-23 发布日期:2016-04-23
  • 通讯作者: 尹燕博,E-mail: yanboyin2011@163.com;陈继明,E-mail: chenjiming@cahec.com
  • 作者简介:王冬冬(1990-),男,山东安丘人,硕士,兽医师,主要从事预防兽医学研究,E-mail: wdd20093246@163.com
  • 基金资助:

    国家自然科学基金(31272535);山东省现代农业产业技术体系家禽创新团队建设项目(SDAIT-13-011-03)

Virus Isolation and Genetic Analysis of HA and NA Genes of H9N2 AIVs Isolated from Shandong Province from 2010 to 2014

WANG Dong-dong1,2,ZHANG Yi2,HOU Guang-yu2,LIU Yong-ju3,LIU Shuo2,JIANG Wen-ming2,LI Jin-ping2,YU Jian-min2,FAN Dan-dan1,CHEN Wen-ya4,WANG Shou-chun4,YIN Yan-bo1* ,CHEN Ji-ming2*   

  1. (1.College of Animal Science and Veterinary Medicine,Qingdao Agricultural University,Qingdao 266019,China;2.China Animal Health and Epidemiology Center,Qingdao 266032,China;3.College of Life Science,Qingdao Agricultural University,Qingdao 266019,China;4.Qingdao Oland-Better Bioengineering Co.,LTD.,Qingdao 266101,China)
  • Received:2015-09-30 Online:2016-04-23 Published:2016-04-23

摘要:

旨在了解山东地区H9N2亚型禽流感病毒(AIV)的流行和遗传变异情况,为该地区H9N2亚型禽流感的防制提供依据。通过鸡胚接种的方法从山东省分离到1 296株H9N2 AIV,并选取40株对其进行HANA基因的扩增、测序及遗传进化分析。结果显示,2013年H9N2 AIV的分离率最高,达42.30%;40株病毒的HANA的核苷酸序列同源性及推导的氨基酸相似性均在90%以上;HA裂解位点序列为PSRSSR↓GLF,NA颈部缺失3个氨基酸;HA和NA均存在糖基化位点的缺失和新的糖基化位点出现;大部分毒株发生了易于感染人型受体的突变;演化分析表明40株病毒的HANA基因均属于Y280-like亚分支。结果提示,H9N2 AIV在山东省各地区普遍流行且在2013年达到高峰,所有毒株均符合低致病性禽流感病毒的分子特征,并且具有结合哺乳动物唾液腺受体的能力,因此应密切关注H9N2病原出现的新变化,制定相应的防控措施。

Abstract:

In order to explore the epidemiological and genetic character of the H9N2 viruses,a long-term surveillance have been conducted in Shandong province.One thousand two hundred and ninety six strains of H9N2 virus were isolated from clinical samples,which were collected in chicken farms and LBMs,and the HA and NA genes of 40 strains selected were amplified and sequenced.The HA and NA genes of these viruses shared more than 90% identity at the nucleotide level and amino acid level;most viruses carried the amino acid sequence PSRSSR↓GLF at the HA cleavage site and a 3-amino-acid deletion in the NA stalk;new potential N-glycosylation sites were found in the HA and NA in some viruses;the Q226L (H3 numbering) mutation was detected in all viruses at the receptor-binding pocket of HA;phylogenetic analysis showed that the HA and NA belong to the Y280-like sublineage.The H9N2 influenza virus was widely circulating in poultry farms of Shandong province,and reached peak in 2013;all of isolates preferentially bound to the human-like receptor,but still have the characteristic of low-pathogenic AIV.So,keeping monitoring and controlling H9N2 virus is necessary.

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