›› 2014, Vol. 41 ›› Issue (12): 56-61.

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Development and Preliminary Application of Real-time RT-PCR Assay for Detecting Quantitation of Hog Cholera Lapinized Virus in Vaccine

FAN Bin1, XU Wen-hua1, HAN Jian-qiang2, MA Zhi-liang1, HU Qi3, XIN Ai-guo3, ZHANG Yi-fang1   

  1. 1. College of Animal Science and Techology, Yunnan Agricultural University, Kunming 650201, China;
    2. Yuxi Agricultural Vocational Technique College, Yuxi 653106, China;
    3. Yunnan Tropical and Subtropical Animal Virus Disease Laboratory, Yunnan Animal Science and Veterinary Institute, Kunming 650224, China
  • Received:2014-08-11 Online:2014-12-20 Published:2014-12-25

Abstract: To establish a rapid, sensitive and specific method for evaluation of viral load of hog cholera lapinized virus (HCLV) vaccine, a Real-time RT-PCR assay was established using two pairs of primers and an internal TaqMan probe from the 5' non-structural region of HCLV genome. The sensitivity of the assay was 1.20×105 copies/mL. The assay was specific and showed no application reaction with porcine reproductive and respiratory syndrome live vaccines, porcine epidemic encephalitis B live vaccines, swine paratyphoid and pseudorabies live vaccines. The coefficient of variation (CV) of 3 different vaccine samples of HCLV was 0.29% to 0.39% in intra-assay and 0.32% to 0.61% in inter-assay, respectively. Using this method to detect 7 different vaccines of HCLV from six different plants, the results showed that there were significant differences in viral loads among the selected HCLV vaccines. In conclusion, this Real-time RT-PCR was a highly sensitive, specific and stable method which could be applied to preliminarily evaluate the viral loads of HCLV vaccines.

Key words: hog cholera lapinized virus (HCLV); Real-time RT-PCR; viral loads

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