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中国防痨杂志 ›› 2019, Vol. 41 ›› Issue (4): 440-446.doi: 10.3969/j.issn.1000-6621.2019.04.014

• 论著 • 上一篇    下一篇

三种分子生物学方法检测结核分枝杆菌耐药性的效能分析

马进宝,杨翰,任斐,党丽云()   

  1. 710100 西安市胸科医院
  • 收稿日期:2018-10-22 出版日期:2019-04-10 发布日期:2019-04-08
  • 通信作者: 党丽云 E-mail:dangliyun@sina.com
  • 基金资助:
    陕西省社会发展科技公攻关项目(2016SF-032);西安市科技计划项目([2017120SF/YX014(3)])

Evaluation of three molecular methods for the detection of drug resistance of Mycobacterium tuberculosis

Jin-bao MA,Han YANG,Fei REN,Li-yun DANG()   

  1. Xi’an Chest Hospital, Xi’an 710061, China
  • Received:2018-10-22 Online:2019-04-10 Published:2019-04-08
  • Contact: Li-yun DANG E-mail:dangliyun@sina.com

摘要:

目的 评价GeneXpert MTB/RIF(简称“GeneXpert”)、基因芯片检测及实时荧光定量PCR熔解曲线法(简称“PCR熔解曲线法”)检测结核分枝杆菌(MTB)耐药性的价值。方法 选取2017年1月至2018年1月西安市胸科医院有表型药物敏感性试验(简称“表型药敏试验”)结果的痰MTB培养阳性的774例肺结核患者作为研究对象,收集其表型药敏试验、GeneXpert、基因芯片及PCR熔解曲线法检测结果。以表型药敏试验结果为参照标准,评估3种分子生物学方法检测MTB耐药性的效能;根据受试者工作特征曲线(ROC曲线)下面积比较3种分子生物学方法检测MTB对利福平(RFP)耐药性的准确度。结果 以表型药敏试验结果为参照标准,GeneXpert检测MTB对RFP耐药性的敏感度和特异度分别为95.6%(87/91)和93.6%(249/266);基因芯片检测MTB对RFP和异烟肼(INH)耐药性的敏感度分别为92.8%(90/97)和78.8%(130/165),特异度分别为96.8%(610/630)和99.1%(557/562);PCR熔解曲线法检测MTB对RFP、INH、左氧氟沙星(Lfx)和阿米卡星(Am)耐药性的敏感度分别为:94.4%(51/54)、82.4%(61/74)、87.1%(27/31)、75.0%(6/8),特异度分别为:93.9%(138/147)、95.3%(121/127)、98.8%(164/166)、99.5%(188/189)。以表型药敏试验结果为参照标准,GeneXpert检测MTB对RFP耐药性ROC曲线下面积为0.95±0.02,基因芯片法和PCR熔解曲线法检测MTB对RFP耐药性曲线下面积均为0.93±0.03。结论 GeneXpert、基因芯片及PCR熔解曲线法检测MTB培养阳性肺结核患者对一线抗结核药物耐药性均比较可靠;PCR熔解曲线法检测MTB对Lfx和Am耐药性比较可靠。

关键词: 结核, 抗多种药物性, 微生物敏感性试验, 分子探针技术, 核酸扩增技术, 评价研究

Abstract:

Objective To analyze the value of GeneXpert MTB/RIF (GeneXpert), gene chip and MeltPro TB in the detection of drug resistance of Mycobacterium tuberculosis (MTB). Methods A total of 774 cases of pulmonary TB with positive culture of MTB in sputum from January 2017 to January 2018 in Xi’an Chest Hospital were retrospectively analyzed. The results of phenotypic drug sensitivity test, GeneXpert detection, gene chip detection and MeltPro TB detection were collected. Based on phenotypic drug susceptibility criteria, the efficacy of the three molecular biology methods to detect drug resistance of MTB was analyzed. The accuracy of the three molecular biology methods to detect rifampicin (RFP) resistance was compared according to the area under receiver operating characteristic (ROC) curve. Results With phenotypic drug susceptibility as standard, the sensitivity and specificity were 95.6% (87/91) and 93.6% (249/266) for GeneXpert in detecting RFP resistance; and for gene chip in detecting RFP and isoniazid (INH) resistance, the sensitivity were 92.8% (90/97) and 78.8% (130/165), and the specificity were 96.8% (610/630) and 99.1% (557/562). For MeltPro TB in detecting RFP, INH, levofloxacin (Lfx) and amikacin (Am), the sensitivity were 94.4% (51/54), 82.4% (61/74), 87.1% (27/31) and 75.0% (6/8), and the specificity were 93.9% (138/147), 95.3% (121/127), 98.8% (164/166) and 99.5% (188/189). The area under the ROC curve of GeneXpert in detecting RFP resistance was 0.95±0.02; the area under the ROC curve of gene chip and MeltPro TB in detecting RFP resistance were 0.93±0.03. Conclusion Detection of MTB resistance to the first-line anti-tuberculosis drugs by GeneXpert, gene chip and MeltPro TB was reliable, and detection of MTB resistance to Lfx and Am by MeltPro TB was reliable.

Key words: Tuberculosis, multidrug-resistant, Microbial sensitivity tests, Molecular probe techniques, Nucleic acid amplification techniques, Evaluation studies