›› 2016, Vol. 43 ›› Issue (1): 8-15.doi: 10.16431/j.cnki.1671-7236.2016.01.002

• 生物技术 • 上一篇    下一篇

分枝杆菌分型三重PCR检测方法的建立及应用

娄忠子1, 刘聪暖1, 贾万忠1,2, 周继章1, 闫鸿斌1, 曹小安1, 李立1, 李兆才1, 付宝权1,2   

  1. 1. 中国农业科学院兰州兽医研究所, 家畜疫病病原生物学国家重点实验室, 农业部兽医公共卫生重点开放实验室, 甘肃省动物寄生虫病重点实验室, 兰州 730046;
    2. 江苏省动物重要疫病与人兽共患病防控协同创新中心, 扬州 225009
  • 收稿日期:2015-07-21 出版日期:2016-01-20 发布日期:2016-01-23
  • 通讯作者: 付宝权 E-mail:fubaoquan@163.com
  • 作者简介:娄忠子(1980-),男,山东泰安人,博士,助理研究员,研究方向:人兽共患细菌病,Tel:0931-8342675;E-mail:louzhongzi@caas.cn
  • 基金资助:
    甘肃省科技支撑计划农业类项目(1304NKCA162);甘肃省农业生物技术研究与应用开发项目(GNSW-2013-27)

Establishment and Application of Mycobacterium Typing Triple PCR Detection Method

LOU Zhong-zi1, LIU Cong-nuan1, JIA Wan-zhong1,2, ZHOU Ji-zhang1, YAN Hong-bin1, CAO Xiao-an1, LI Li1, LI Zhao-cai1, FU Bao-quan1,2   

  1. 1. Key Laboratory of Veterinary Parasitology of Gansu Province, Key Laboratory of Veterinary Public Health of Ministry of Agriculture, State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou 730046, China;
    2. Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou 225009, China
  • Received:2015-07-21 Online:2016-01-20 Published:2016-01-23

摘要: 本研究旨在建立一种快速鉴定分枝杆菌的三重PCR方法,并比较分析其在临床检测中的可靠性。根据已发表的结核分枝杆菌、牛分枝杆菌和非洲分枝杆菌rv 3036c基因,结核分枝杆菌rv 1970f基因(RD7)和牛分枝杆菌pncA基因的序列,改造并设计合成了3对特异性扩增引物,建立了一种能对分枝杆菌样品进行初步鉴定的三重PCR方法。结果显示该方法可针对rv 3036crv 1970fpncA基因分别扩增出大小为500、125和249 bp的目的片段,能特异性检测出结核分枝杆菌(500和125 bp两条带)和牛分枝杆菌(500和249 bp两条带),并可将结核分枝杆菌、牛分枝杆菌与其他分枝杆菌加以区分。本方法的检测灵敏度为50 pg/μL模板基因组DNA。对86株抗酸染色阳性菌进行三重PCR鉴定,鉴定结果与细菌16S rDNA和ITS序列测定结果一致,检测准确度为100%,优于生长特征和生化试验鉴定。

关键词: 分枝杆菌; 结核分枝杆菌; 牛分枝杆菌; 三重PCR; 初步鉴定

Abstract: This study was aimed to establish a triple PCR method to rapidly identify Mycobacterium species, and evaluate its testing reliability.Three pairs of primer that were respectively specific to rv 3036c, rv 1970f and pncA genes of Mycobacterium were designed to establish a triple PCR for preliminary identification of Mycobacterium tuberculosis(M.tuberculosis), Mycobacterium bovis(M.bovis) and other Mycobacterium spp.PCR products were the expected sizes of 500(rv3036c), 125(rv1970f) and 249 bp(pncA), and contained two DNA bands(500 and 125 bp) with M.tuberculosis DNA template, two DNA bands(500 and 249 bp) with M.bovis DNA template.No band or non-specific band appeared with Mycobacterium spp.except M.tuberculosis and M.bovis DNA templates.The sensitivity of the triple PCR was calculated to 50 pg/μL template of genomic DNA.86 acid-fast bacteria were detected by the triple PCR, 16S rDNA and ITS gene sequencing, growth test and biochemical test, and the results were consistent between triple PCR and 16S rDNA and ITS gene sequencing.The detecting accuracy of triple PCR was 100%, and higher than growth test and biochemical test.

Key words: Mycobacterium; Mycobacterium tuberculosis; Mycobacterium bovis; triple PCR; preliminary identification

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