ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2016, Vol. 47 ›› Issue (7): 1465-1473.doi: 10.11843/j.issn.0366-6964.2016.07.021

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Establishment and Application of an RT-PCR Assay for Yak Rotavirus Based on the Sequence Analysis of Yak Rotavirus VP6 gene

ZHOU Fang,YUE Hua,ZHANG Bin,LI Fan,CHEN Xi,TANG Cheng*   

  1. (College of Life Science and Technology,Southwest University for Nationalities/ Innovative Research Team on Animal Epidemic Prevention and Control of Education Department of Sichuan,Chengdu 610041,China)
  • Received:2016-01-21 Online:2016-07-23 Published:2016-07-23

Abstract:

 Rotavirus (RV) VP6 gene is the main target gene of molecular detection,but the gene point mutations affects the molecular detection of RV.The purpose of this experiment was to establish a detection method of yak RV by RT-PCR method which applied in clinical samples based on the study of genetic variation yak RV VP6.The fragments of yak RV VP6 ranged in 931-1 338 bp were obtained with the primers designed by Prime 5.0 software from 30 samples of yak diarrhea.Sequence analysis showed that,yak RV VP6 genes represented multiple point mutations in the section of 931-1110 bp compared with bovine rotavirus (BRV),while the section between 1 100-1 338bp was highly conserved.According to this result,the assay has successfully established a method with good specificity and stability.The primer could amplify the specific fragment of yak RV and BRV,with no amplification of other unrelated pathogens.The detection limit of viral nucleic acid of the assays was 0.45 pg•μL-1.With a remarkable detection rate in yak RV,the RT-PCR method provided a useful tool for the diagnosis and epidemiological investigation of yak RV disease.Additionally,this method can also be used in BRV detection.The RV detection rate in 234 samples of yak diarrhea from different provinces were 60.00% in Tibet (36/60),95.00% in Qinghai (57/60),85.19% in Sichuan(46/54) and 90.00% in Yunnan (54/60),respectively.The result shows that RV infection is an important cause of yak diarrhea.

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