中国畜牧兽医

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2株高致病性猪繁殖与呼吸综合征病毒分子特征分析

罗成波1,崔敏1,孔令萍1,程振涛2,周碧君2,毛黎红2   

  1. 1.黔西南州疫病预防控制中心,贵州兴义 562400;2.贵州大学动物科学学院,贵州贵阳 550025
  • 收稿日期:2014-03-28 出版日期:2014-08-20 发布日期:2014-08-22
  • 通讯作者: 程振涛(1979—),副教授,主要从事预防兽医学研究。Tel: 0851-8298078;E-mail: chengzhentao@sohu.com
  • 作者简介:罗成波(1960—),男,贵州人,学士,高级兽医师,研究方向:动物疫病病原学。
  • 基金资助:

    贵州省动物疫病与兽医公共卫生重点实验室培育(黔科合计Z字[2011]4008号);贵州省重大科技专项计划资助项目(黔科合重大专项字[2011]6009号)。

Molecular Characteristics Analysis of Two Strains of Highly Pathogenic Porcine Reproductive and Respiratory Syndrome Virus

LUO Cheng-bo1, CUI Min1, KONG Ling-ping1, CHENG Zhen-tao2, ZHOU Bi-jun2, MAO Li-hong2   

  1. 1. Center for Animal Disease Control of Qianxinan in Guizhou Province, Xingyi 562400, China; 2. College of Animal Science, Guizhou University, Guiyang 550025, China
  • Received:2014-03-28 Online:2014-08-20 Published:2014-08-22

摘要: 为进一步掌握黔西南州猪繁殖与呼吸综合征病毒(porcine reproductive and respiratory syndrome virus,PRRSV)流行变异趋势,对2株高致病性PRRSV(HR-PRRSV)贵州分离株GZLPS、GZSB进行Nsp2与GP5基因克隆和测序,并分析毒株分子变异特征。结果显示,2株分离株Nsp2基因有90个核苷酸不连续缺失,不同位置的36个核苷酸发生突变;GP5基因存在不同位点置换。同源性比对与系统进化树分析显示,2株分离株Nsp2与GP5基因与HP-PRRSV JXA1株及贵州省2011年以前流行毒株的核苷酸同源性在96%以上,氨基酸同源性在95%以上,但在分子变异上存在差异。结果表明黔西南州PRRSV变异方式已呈多样性。

关键词: 高致病性猪繁殖与呼吸综合征病毒; 分子特征; 分析; Nsp2; GP5

Abstract: In order to find out the graph variation characteristics of porcine reproductive and respiratory syndrome virus (PRRSV) of Qianxinanin Guizhou province, the Nsp2 and GP5 genes of PRRSV isolated strain GZLPS and GZSB were cloned, sequenced and analyzed. The results showed that, the Nsp2 gene of 2 isolates contained 90 nucleotides for discontinuous deletion and 36 nucleotides for mutation. Furthermore, there were different replacements of nucleotides in GP5 gene. Not only Nsp2 gene, but also GP5 gene, the nucleotide homologies were above 96% and the amino acid homologies were above 95% with strain JXA1 and isolates in Guzizhou since 2011, but there were differencex in molecular variation among these strains. It indicated that the PRRSV had already behaved diverse on variation style of Qianxinan in Guizhou province.

Key words: highly pathogenic porcine reproductive and respiratory syndrome virus; molecular characteristics; analysis; Nsp2; GP5