ACTA AGRICULTURAE BOREALI-SINICA ›› 2014, Vol. 29 ›› Issue (1): 232-238. doi: 10.7668/hbnxb.2014.01.042

Special Issue: Animal husbandry

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Isolation,Identification and Genetic Variation of Porcine Reproductive and Respiratory Syndrome Virus Variant

WANG Xiao-min1, HE Kong-wang1, ZHOU Zhong-tao1,2, MAO Ai-hua1, YU Zheng-yu1, WANG Wei1, NI Yan-xiu1, WEN Li-bin1, ZHANG Xue-han1, GUO Rong-li1, LI Bin1, YU Yang1   

  1. 1. Institute of Veterinary Medicine,Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Nanjing 210014, China;
    2. College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
  • Received:2013-08-09 Published:2014-02-28

Abstract: A porcine reproductive and respiratory syndrome virus(PRRSV) strain was isolated from the serum of a PRRSV infected pig in Jiangsu Province. The biological characteristics of this isolate was identified and the genome of Nsp2 and ORF5 were determined and analyzed. The serum which were detected PRRSV positive and PPV, PRV negative was inoculated and passaged on Marc-145 cells. This isolate was identified by RT-PCR and CPE,and confirmed by immunofluorescence assay(IFA). The TCID 50 of this isolate was measured and the genome of Nsp2 and ORF5 were sequenced and its homology and evolutionary relationship were analyzed by DNAStar software. The results indicated that the PRRSV strain was successfully isolated and it could induce cytopathogenic effect(CPE) on Marc-145 cells. The specific fluorescence could be observed and the TCID 50 of this strain was 105. 5. Comparison analysis of the Nsp2 genome of the isolate 2010JS02 and other strains revealed that the isolate has a discontinuous deletion of 30 amino acids and another deletion at the position of 495- 516 amino acid's site. According to the se-quences analysis of GP5,the isolate 2010JS02 showed identity of 57. 1%- 99. 5% among other strains,a high identity of 99. 5% with NJ-1106. The phylogenetic tree was combined and showed that 2010JS02 belonged to NA and classified into HP-PRRSV like WHU4,NJ-1106 and other HP-PRRSV strains. We successfully isolated a HPPRRSV variant and named it as 2010JS02. These results provided foundations for further studying the genetic variation and the prevention of PRRSV.

Key words: Porcine reproductive and respiratory syndrome virus(PRRSV), Isolation and identification, Genet-is vanatron

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Cite this article

WANG Xiao-min, HE Kong-wang, ZHOU Zhong-tao, MAO Ai-hua, YU Zheng-yu, WANG Wei, NI Yan-xiu, WEN Li-bin, ZHANG Xue-han, GUO Rong-li, LI Bin, YU Yang. Isolation,Identification and Genetic Variation of Porcine Reproductive and Respiratory Syndrome Virus Variant[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2014, 29(1): 232-238. doi: 10.7668/hbnxb.2014.01.042.

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