›› 2012, Vol. 39 ›› Issue (4): 82-85.

• 生物技术 • 上一篇    下一篇

两株猪繁殖与呼吸征病毒的分离鉴定及遗传变异分析

张超轶, 吴欣伟, 闫明菲, 张亮权, 郭泗虎, 黄昌力, 黄震, 张民泽, 赵付荣, 张桂红   

  1. 华南农业大学兽医学院,广东广州 510642
  • 收稿日期:2011-10-11 修回日期:1900-01-01 出版日期:2012-04-20 发布日期:2012-04-20
  • 通讯作者: 张桂红

Isolation and Identification of Two Strains of Porcine Reproductive and Respiratory Syndrome Virus and Genetic Variation Analysis

ZHANG Chao-yi, WU Xin-wei, YAN Ming-fei, ZHANG Liang-quan, GUO Si-hu, HUANG Chang-li, HUANG Zhen, ZHANG Min-ze, ZHAO Fu-rong, ZHANG Gui-hong   

  1. College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, China
  • Received:2011-10-11 Revised:1900-01-01 Online:2012-04-20 Published:2012-04-20

摘要: 从广东省发病猪场采集的组织和血清中分离到两株PRRSV,病料经RT-PCR检测为阳性,通过Marc-145细胞进行传代,可产生明显细胞病变,通过间接免疫荧光可检测到荧光信号,两株病毒分别命名为ZH-GD株和ZS-GD株。对两株病毒的ORF5和Nsp2高变区进行序列测定和分析,结果表明,PRRSV ZH-GD株和ZS-GD株的核苷酸序列与欧洲型代表株LV株间的相似性相对较远,与美洲株经典毒株VR-2332间的相似性分别为88.6%和88.1%,与中国经典美洲毒株CH-1a间的相似性分别为94.4%和93.0%。在Nsp2上有30个氨基酸的缺失,与JXA1、XH-GD等高致病性变异株的Nsp2缺失位置一致。分离的两株PRRSV均属于美洲型的变异株PRRSV。

关键词: PRRSV; 分离鉴定; 序列测定和分析

Abstract: Two strains of porcine reproductive and respiratory syndrome virus were isolated from tissue and serum from some Guangdong pig farms and shown PRRS positive in RT-PCR testing by Marc-145. The two strains of virus can passage stably and cause typical cytopathic effect, and fluorescence signal was detected by IFA, were named ZH-GD strain and ZS-GD strain.The analysis of variable region sequences of ORF5 and Nsp2 of two strains of virus showed that, PRRSV ZH-GD strain and ZS-GD strain were far to Europe strain LV,the homology of nuclear nucleotide sequence were 50.9% and 49.2%, and the homology with VR-2332 strain were 88.6% and 88.1%, with classic American CH-1a strain were 94.4 % and 93.0%. And there were 30 amino acids deletion in Nsp2.It shared the same deletion with JXA1, XH-GD and other highly pathogenic variant. Thus, the two strains of PRRSV belonged to variants of American type.

Key words: PRRSV; isolation and identification; sequencing and analysis

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