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中国防痨杂志 ›› 2023, Vol. 45 ›› Issue (12): 1158-1163.doi: 10.19982/j.issn.1000-6621.20230304

• 论著 • 上一篇    下一篇

GeneXpert MTB/RIF和TB-DNA两种荧光PCR方法检测肺外结核脓液样本的效能分析

邵燕琴, 朱明智, 戴玲珊, 彭利君, 梅宾, 方婷婷, 蔡龙()   

  1. 杭州市红十字会医院临床医学检验实验中心,杭州 310003
  • 收稿日期:2023-08-22 出版日期:2023-12-10 发布日期:2023-11-27
  • 通信作者: 蔡龙,Email:359286603@qq.com
  • 基金资助:
    杭州市医药卫生科技计划重大项目(Z20220032);杭州市医药卫生科技计划重大项目(A20220019);杭州市红十字会医院青年基金项目(HHQN 2022001)

Efficacy analysis of GeneXpert MTB/RIF and TB-DNA fluorescent PCR methods for detecting pus samples in the diagnosis of extrapulmonary tuberculosis

Shao Yanqin, Zhu Mingzhi, Dai Lingshan, Peng Lijun, Mei Bin, Fang Tingting, Cai Long()   

  1. Clinical Medical Laboratory Center,Hangzhou Red Cross Hospital,Hangzhou 310003, China
  • Received:2023-08-22 Online:2023-12-10 Published:2023-11-27
  • Contact: Cai Long, Email: 359286603@qq.com
  • Supported by:
    Major Project of Hangzhou Medical and Health Science and Technology Plan(Z20220032);Major Project of Hangzhou Medical and Health Science and Technology Plan(A20220019);Hangzhou Red Cross Hospital Youth Fund Project(HHQN 2022001)

摘要:

目的: 比较GeneXpert MTB/RIF(简称“Xpert”)和结核/非结核分枝杆菌PCR荧光探针法(简称“TB-DNA”)检测肺外结核脓液样本的诊断价值。方法: 回顾性分析2021年1月至2023年2月在杭州市红十字会医院收治的疑似肺外结核并在病灶部位获取脓液样本的患者388例,分别对脓液样本进行Xpert、TB-DNA和BACTEC MGIT 960液体培养(简称“ MGIT 960培养”)三项检测,以临床诊断为参考标准,比较两种荧光PCR方法在脓液样本中诊断肺外结核的效能。结果: 以临床诊断为标准,Xpert和TB-DNA检测的敏感度、特异度和ROC曲线下面积(AUC)分别为84.15%(276/328)、100.00%(60/60)、0.92和84.45%(277/328)、100.00%(60/60)、0.92。以MGIT 960培养为参考标准,Xpert和TB-DNA检测的敏感度、特异度和AUC分别为89.90%(89/99)、 35.29%(102/289)、0.63和92.93%(92/99)、35.99%(104/289)、0.65。一致性分析显示:TB-DNA和Xpert与临床诊断高度一致(Kappa值分别为0.62和0.63),MGIT 960培养与临床诊断为极低一致性(Kappa值为0.12)。在388例患者样本中,TB-DNA和Xpert同时检测出MTB阳性262例,两种方法均未检出97例,TB-DNA阳性Xpert阴性15例,TB-DNA阴性Xpert阳性14例。Xpert检测MTB阳性276例,利福平耐药12例,利福平耐药率为4.35%(12/276)。结论: 初治肺外结核患者获得脓液样本后可以先使用TB-DNA进行初筛,初筛阳性样本再通过其他检测方法获得耐药信息。

关键词: 分子诊断技术, 脓液检查, 评价研究

Abstract:

Objective: To compare the diagnostic value of Mycobacterium tuberculosis (MTB)/Rifampicin resistance real-time fluorescent quantitative nucleic acid amplification assay (GeneXpert MTB/RIF, Xpert) and tuberculosis/non-tuberculosis mycobacterium PCR fluorescent probe (TB-DNA) in detecting extra-pulmonary pus samples for tuberculosis. Methods: A retrospective analysis was performed on 388 cases of suspected extrapulmonary tuberculosis treated in Hangzhou Red Cross Hospital from January 2021 to February 2023, and pus samples were obtained from the lesion site. The pus samples were detected by Xpert, TB-DNA and BACTEC MGIT 960 liquid culture (MGIT 960 culture), respectively. To compare the efficacy of two fluorescence PCR methods in the diagnosis of extrapulmonary tuberculosis in pus samples, using clinical diagnosis as a reference standard. Results: Using a clinical diagnosis as the standard, the sensitivity, specificity, and AUC of Xpert and TB-DNA were 84.15% (276/328), 100.00% (60/60), 0.92 and 84.45% (277/328),100.00% (60/60), 0.92, respectively. Using culture as the gold standard, the sensitivity, specificity, and AUC of Xpert and TB-DNA were 89.90% (89/99), 35.29% (102/289), 0.63 and 92.93% (92/99), 35.99% (104/289), 0.65, respectively. Consistency analysis showed that TB-DNA and Xpert were highly consistent with clinical diagnosis (Kappa values were 0.62, 0.63), MGIT 960 culture showed very low consistency with clinical diagnosis (Kappa value was 0.12). Among the 388 samples, TB-DNA and Xpert simultaneously detected 262 cases of MTB positivity, but neither method detected 97 cases. There were 15 cases of TB-DNA positivity and Xpert negativity, and 14 cases of TB-DNA negativity and Xpert positivity. Xpert detected 276 cases of MTB positivity, 12 cases of rifampicin resistance, and the rifampicin resistance rate was 4.35% (12/276). Conclusion: After receiving pus samples from newly treated patients with extrapulmonary tuberculosis, TB-DNA could be used for preliminary screening, and positive samples could be obtained by other detection methods for drug resistance information.

Key words: Molecular diagnostic technology, Examination of pus, Evaluation studies

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