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福建省临床分离分枝杆菌菌种鉴定研究

发布时间:2018-04-29 15:56

  本文选题:结核分枝杆菌 + 非结核分枝杆菌 ; 参考:《福建医科大学》2013年硕士论文


【摘要】:目的评价结核分枝杆菌抗原胶体金法和涂片形态学特征初步鉴别临床分离分枝杆菌菌种的应用价值;分析临床分离非结核分枝杆菌(NTM)菌种,探讨福建省NTM临床分离率和菌种分布情况。 方法应用涂片形态学特征和结核分枝杆菌抗原胶体金法对3681株临床分离分枝杆菌进行结核分枝杆菌复合群(MTBC)与NTM鉴别并与传统PNB法结果进行比较;应用hsp65-和rpoB-PCR-RFLP对鉴别出的NTM菌株进行菌种鉴定。结果3681株临床分离分枝杆菌共鉴别出405株NTM,NTM临床分离率为11.0%。以传统PNB/TCH鉴别培方法作为金标准,应用涂片形态学特征鉴别MTBC与NTM的符合率为98.9%、敏感度为98.4%(3225/3276)、特异度为95.8%(388/405)、阳性预测值为99.97%和阴性预测值为91.2%;结核分枝杆菌抗原胶体金法的符合率为98.2%、敏感度为98.8%(3237/3276),特异度为99.7%(404/405)、阳性预测值为99.5%和阴性预测值88.4%;结合两种方法进行判断,当两种方法均为阳性,可报告菌株为MTBC,其阳性预测值为100.0%;两种方法均为阴性,可报告NTM,其阴性预测值为100.0%。 鉴别出的405株NTM菌株,经hsp65-和rpoB-PCR-RFLP鉴定,菌种分布达24个种,,其中胞内分枝杆菌(M.intracellulare)173株(42.72%),鸟分枝杆菌(M.avium)88株(21.73%),脓肿分枝杆菌(M. abscessus)55株(13.58%),戈登分枝杆菌(M. gordonae)28株(6.91%),马赛分枝杆菌M. massiliense亚种19株(4.69%),偶发分枝杆菌(M. fortuitum)9株(2.22%),缓黄分枝杆菌(M.lentiflavum)6株(1.48%),马赛分枝杆菌(M. marseillens)5株(1.23%),苏尔加分枝杆菌(M. szulgai)3株(7.41%),摩纳哥分枝杆菌M. saskatchewanense亚种、首尔分枝杆菌(M. seoulense)、脓毒分枝杆菌M. shimoidei亚种和三重分枝杆菌(M. triplex)各2株(0.49%),支气管戈登菌(Gordonia bronchialis)、龟分枝杆菌(M. chelonae)、哥伦比亚分枝杆菌(M. colombiense)、日内瓦分枝杆菌(M.genavense)、荷斯坦分枝杆菌(M. holsaticum)、堪萨斯分枝杆菌(M. kansasii)、熊本分枝杆菌(M. kumamotonense)、缓黄分枝杆菌M. mantenii亚种、摩纳哥分枝杆菌(M. monacense)、脓毒分枝杆菌(M. septicum)和脓毒分枝杆菌M.stomatepiae亚种各1株(0.25%)。 结论涂片形态学和结核分枝杆菌抗原胶体金两种方法是鉴别MTBC与NTM的快速、简便、准确的方法,两者联合使用,可提高菌种鉴定的准确性,适用于分枝杆菌培养物的初步鉴定。2009-2010年福建省NTM临床分离率为11.0%,NTM种类多,以鸟-胞内分枝杆菌复合群(MAC)为福建省NTM的主要流行菌种,占总数的64.45%。
[Abstract]:Objective to evaluate the application value of colloidal gold method and smear morphology in the identification of clinical isolates of Mycobacterium tuberculosis, and to analyze the clinical isolates of non-tuberculous mycobacteria (NTMM). To investigate the clinical isolation rate and distribution of NTM in Fujian Province. Methods 3681 clinical isolates of Mycobacterium tuberculosis were identified by smear morphological characteristics and colloidal gold method of Mycobacterium tuberculosis antigen. The results were compared with the results of traditional PNB method. The identified NTM strains were identified by hsp65- and rpoB-PCR-RFLP. Results the clinical isolation rate of 3681 clinical isolates of Mycobacterium was 11.0. The traditional PNB/TCH identification and culture method was used as the gold standard. The coincidence rate between MTBC and NTM was 98.9, the sensitivity was 98.4%, the specificity was 95.888 / 405, the positive predictive value was 99.97% and the negative predictive value was 91.2%, the coincidence rate of colloidal gold assay of Mycobacterium tuberculosis antigen was 98.22.The sensitivity of colloidal gold assay of Mycobacterium tuberculosis antigen was 98.82% and the sensitivity was 32373276%. The degree is 99.7 / 404 / 405, the positive predictive value is 99.5% and the negative predictive value is 88.4. When both methods were positive, the positive predictive value of MTBCcould be 100.0 and the negative predictive value of NTMand the negative predictive value of both methods were 100.0 and 100.0 respectively. A total of 405 NTM strains were identified and identified by hsp65- and rpoB-PCR-RFLP. Among them, M. intracellulare 173 strains, M. avium 88 strains, M. aviumum 88 strains, M. abscess M. abscessus)55 strain 13.5858, M. Gordon M. gordonae)28 strain 6.91C, M. massiliense subspecies 19 strains 4.69m, M. sporophyllum M. fortuitum)9 2.22th, M. fulvium M. lentiflavum 6 strains, M. aeruginosa M. lentiflavum strain 13.58, M. Gordon M. gordonae)28 strain 6.91, M. massiliense subspecies 19, M. fortuitum)9 2.22th, M. lentiflavumum 6, Mycobacterium abscess M. lentiflavum6, M. aeruginosa M. lentiflavum 6. 1. 48% of Mycobacterium Maxima M. marseillens)5 strain 1.23%, M. szulgai)3 strain 7.41 1, M. Monaco M. saskatchewanense subspecies, 1. 23%, 1. 23%, 1. 48%, 1. 23%, 1. 23%, 1. 48%, 1. 48%, 1. 23%, 1. 23% and 1. 23%. Mycobacterium Seoulenseus, M. shimoidei subspecies and M. triplexus, 2 strains each, 0.49cm, Gordonia bronchialisus, M. chelonaeae, M. Colombia, M. colombiense, M. genavenseus, M. Holstein M. holsaticum, M. kansasiiana, M. bear, M. kumamotonenseus, M. mantenii subspecies, M. Monacenseus, M. septicum (M. septicum) and 1 M.stomatepiae subspecies (M. septicum) of M. Monacenseus each. Conclusion smear morphology and colloidal gold of Mycobacterium tuberculosis antigen are fast, simple and accurate methods for identifying MTBC and NTM. The clinical isolation rate of NTM in Fujian Province from 2009 to 2010 was 11.0%. The main prevalent strain of NTM in Fujian Province was the combination of bird and intracellular mycobacterium (Marc), which accounted for 64.45% of the total.
【学位授予单位】:福建医科大学
【学位级别】:硕士
【学位授予年份】:2013
【分类号】:R378.91

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