畜牧兽医学报 ›› 2014, Vol. 45 ›› Issue (3): 434-442.doi: 10.11843/j.issn.0366-6964.2014.03.013

• 预防兽医 • 上一篇    下一篇

1株绵羊边界病病毒的分离鉴定与序列分析

刘霞1,2,毛立2,李文良2,杨蕾蕾2,张纹纹2,魏建忠1 *,江杰元2 *   

  1. (1.安徽农业大学动物科技学院,合肥 230036;2.江苏省农业科学院 兽医研究所,农业部兽用生物制品工程技术重点实验室,国家兽用生物制品工程技术研究中心,南京 210014)
  • 收稿日期:2013-09-04 出版日期:2014-03-23 发布日期:2014-03-21
  • 通讯作者: 魏建忠(1956-),男,教授,E-mail:wjz@ahau.edu.cn; 江杰元(1957-),男,研究员, E-mail:jieyuanj57@gmail.com
  • 作者简介:刘霞(1988-),女,安徽六安人,硕士生,主要从事动物疫病诊断研究,E-mail:ZHEDADA@126.com
  • 基金资助:

    江苏省农业科技自主创新资金项目(CX(12)3064)

Isolation and Sequence Analysis of a Border Disease Virus from Sheep

LIU Xia1,2, MAO Li2, LI Wen-liang2, YANG Lei-lei2, ZHANG Wen-wen2, WEI Jian-zhong1*, JIANG Jie-yuan2*   

  1. (1.College of Animal Science and Technology, Anhui Agricultural University,Hefei 230036, China;2.Key Laboratory of Veterinary Biological Engineering and Technology of Ministry of Agriculture,National Center for Engineering Research of Veterinary Bio-products,Institute of Veterinary Medicine,Jiangsu Academy of Agricultural Sciences,Nanjing 210014, China)
  • Received:2013-09-04 Online:2014-03-23 Published:2014-03-21

摘要:

对华东地区某羊场采集定点监测的绵羊血液样品进行边界病的感染情况调查。通过RT-PCR方法检测瘟病毒5′-UTR基因,发现1只绵羊的血清样品在不同时间检测均为阳性,证实其为边界病病毒(BDV)持续性感染。将该阳性血清样品接种MDBK细胞,进行病毒分离鉴定。通过Npro基因RT-PCR扩增、电镜观察、病毒全基因组序列分析,并对分离毒株5′-UTR和Npro基因进行遗传进化分析。结果显示,该毒株在MDBK细胞上盲传至第8代,不发生细胞病变。RT-PCR扩增获得Npro 基因预期大小片段,电镜观察以及测序分析表明成功分离出1株BDV,将其命名为JSLS12-01。设计覆盖BDV全基因组的6对引物,RT-PCR扩增并测序,该分离株全基因组序列大小为12 227 bp(GenBank登录号为KC963426)。序列比对结果显示,该毒株基因组序列和氨基酸序列与已有BDV分离株之间相似性分别为72.3%~80.4%和80.1%~89.7%。5′-UTR和Npro基因系统进化分析显示,该分离株与BDV 3参考毒株亲缘关系最近,相似性最高分别为87.7%和75.8%。结果证实从绵羊血液样品中鉴定并分离到1株ncp型BDV分离株,经序列分析表明该毒株属于BDV 3亚型。

关键词: 边界病病毒, 分离, 鉴定, 序列分析

Abstract:

In order to investigate the prevalence status of border disease,serum samples were collected from one sheep flock in east China and tested through RT-PCR method with the 5′-UTR generic primers of pestivirus.One sheep was detected as positive infection of border disease virus (BDV) at different sampling times.Positive serum sample was inoculated onto MDBK cells for viral isolation and identification.Then RT-PCR amplification of Npro gene,electron microscopy detection of isolated virus,analysis of the complete genome sequences and phylogenetic analysis of the 5′-UTR and Npro gene were performed.The results showed that no cytopathy effect (CPE) was observed until the eighth generation by serial passages.BDV was detected from cell cultures by RT-PCR using Npro gene primers; and confirmed with sequence analysis as well as electron microscopy detection.The isolate was named as JSLS12-01.Amplification of complete genomic sequence was performed with six pairs of primers covering the near-full genome.The viral genome was about 12 227 nucleotides in size and had been submitted to the GenBank with registered number KC963426.Based on comparative sequence analysis of full genome and the deduced amino acids between this isolate and BDV reference strains,there were 72.3%-80.4% and 80.1%-89.7% identities,respectively.Phylogenetic analysis using partial 5′-UTR nucleotide sequence and Npro sequence identified that the virus clustered within BDV 3 viruses,with the highest homology of 87.7% and 75.8%,respectively.Above all,we successfully isolated and identified one BDV 3 strain from sheep of the non-cytopathogenic biotype.

Key words: border disease virus (BDV), isolation, identification, sequence analysis

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