ACTA VETERINARIA ET ZOOTECHNICA SINICA ›› 2019, Vol. 50 ›› Issue (8): 1658-1665.doi: 10.11843/j.issn.0366-6964.2019.08.015

• PREVENTIVE VETERINARY MEDICINE • Previous Articles     Next Articles

Establishment and Application of a Duplex Real-time PCR Assay for Detection of Bacillus anthracis

WANG Suhua1*, SHUAI Jiangbing2, LI Zhou1, YUAN Shuhui1, WU Shaoqiang3, Lü Jizhou3, ZHAO Zhiguo4   

  1. 1. Synthesis Technique Service Center of Wenzhou Customs, Wenzhou 325027, China;
    2. Technology Center of Hangzhou Customs, Hangzhou 310016, China;
    3. Institute of Animal Quarantine, Chinese Academy of Inspection and Quarantine, Beijing 100029, China;
    4. Technology Center of Huhehaote Customs, Hohhot 010020, China
  • Received:2019-01-03 Online:2019-08-23 Published:2019-08-23
  • Supported by:
     

Abstract: In order to detect Bacillus anthracis rapidly and accurately, two sets of specific primers and TaqMan probes were designed according to the chromosomal sequence BA5345 gene and virulent plasmid sequence PA gene to establish a duplex real-time PCR assay for detection of Bacillus anthracis. The specificity, sensitivity and repeatability were tested, respectively. Then the duplex real-time PCR was used to detect clinical samples and compared with conventional PCR. Results showed that the Bacillus anthracis could be identified specifically and without any cross reaction with other bacillus of Bacillus cereus group. Besides, the detection limits were 8.0 and 7.8 copies·μL-1 for BA5345 gene and PA gene, respectively. The coefficients of variations were less than 1.5% for both intra-assay and inter-assay. Thirty-five samples contaminated by Bacillus anthracis were detected by the established assay, BA5345 positive rate was 80.0% and PA positive rate was 82.9%. The sensitivity of duplex real-time PCR was significantly higher than that of conventional PCR. The results indicate that the detection assay could be applied for rapid and high through-put detection of Bacillus anthracis.

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