ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2017, Vol. 48 ›› Issue (7): 1281-1287.doi: 10.11843/j.issn.0366-6964.2017.07.012

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Isolation and Identification of Bluetongue Virus Serotype 7 Field Isolate

LÜ Min-na1#, YANG Heng2#, SUN Ming-fei1, LI Juan1, LIN Xu-hui1, ZHANG Jian-fei1, LIAO Shen-quan1, QI Nan-shan1, WU Cai-yan1, LI Hua-chun2*, CHEN Qin-ling1*   

  1. 1. Guangdong Open Laboratory of Veterinary Public Health, Guangdong Provincial Key Laboratory of Animal Disease Prevention, Institute of Animal Health, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China;
    2. Yunnan Animal Science and Veterinary Institute, Kunming 650224, China
  • Received:2016-11-15 Online:2017-07-23 Published:2017-07-23
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Abstract:

In 2014, cattle blood samples were collected from Guangdong province and vector-borne pathogens contained in them were detected in the present study. Samples which were detected as BTV positive by quantitative reverse transcription polymerase chain reaction (qRT-PCR) were isolated and identified. Embryonated chicken eggs were subsequently inoculated and their livers were harvested to passage on C6/36 and BHK-21 cells, respectively. Extensive cytopathic changes were observed. A subsequent qRT-PCR assay target with VP 7 gene and SEM observation results further confirmed the presence of BTV, and named as GD/ST2014. In addition, VP 2 gene fragment was used for genotyping. And combined with VNT test results, the genotype of the isolate obtained in the present study were identified as BTV-7. This was the first report that bluetongue virus serotype 7 field isolate was isolated from cattle in China.

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