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福建省臨床分離分枝桿菌菌種鑒定研究

發(fā)布時間:2018-04-29 15:56

  本文選題:結核分枝桿菌 + 非結核分枝桿菌; 參考:《福建醫(yī)科大學》2013年碩士論文


【摘要】:目的評價結核分枝桿菌抗原膠體金法和涂片形態(tài)學特征初步鑒別臨床分離分枝桿菌菌種的應用價值;分析臨床分離非結核分枝桿菌(NTM)菌種,探討福建省NTM臨床分離率和菌種分布情況。 方法應用涂片形態(tài)學特征和結核分枝桿菌抗原膠體金法對3681株臨床分離分枝桿菌進行結核分枝桿菌復合群(MTBC)與NTM鑒別并與傳統(tǒng)PNB法結果進行比較;應用hsp65-和rpoB-PCR-RFLP對鑒別出的NTM菌株進行菌種鑒定。結果3681株臨床分離分枝桿菌共鑒別出405株NTM,NTM臨床分離率為11.0%。以傳統(tǒng)PNB/TCH鑒別培方法作為金標準,應用涂片形態(tài)學特征鑒別MTBC與NTM的符合率為98.9%、敏感度為98.4%(3225/3276)、特異度為95.8%(388/405)、陽性預測值為99.97%和陰性預測值為91.2%;結核分枝桿菌抗原膠體金法的符合率為98.2%、敏感度為98.8%(3237/3276),特異度為99.7%(404/405)、陽性預測值為99.5%和陰性預測值88.4%;結合兩種方法進行判斷,當兩種方法均為陽性,可報告菌株為MTBC,其陽性預測值為100.0%;兩種方法均為陰性,可報告NTM,其陰性預測值為100.0%。 鑒別出的405株NTM菌株,經(jīng)hsp65-和rpoB-PCR-RFLP鑒定,菌種分布達24個種,,其中胞內(nèi)分枝桿菌(M.intracellulare)173株(42.72%),鳥分枝桿菌(M.avium)88株(21.73%),膿腫分枝桿菌(M. abscessus)55株(13.58%),戈登分枝桿菌(M. gordonae)28株(6.91%),馬賽分枝桿菌M. massiliense亞種19株(4.69%),偶發(fā)分枝桿菌(M. fortuitum)9株(2.22%),緩黃分枝桿菌(M.lentiflavum)6株(1.48%),馬賽分枝桿菌(M. marseillens)5株(1.23%),蘇爾加分枝桿菌(M. szulgai)3株(7.41%),摩納哥分枝桿菌M. saskatchewanense亞種、首爾分枝桿菌(M. seoulense)、膿毒分枝桿菌M. shimoidei亞種和三重分枝桿菌(M. triplex)各2株(0.49%),支氣管戈登菌(Gordonia bronchialis)、龜分枝桿菌(M. chelonae)、哥倫比亞分枝桿菌(M. colombiense)、日內(nèi)瓦分枝桿菌(M.genavense)、荷斯坦分枝桿菌(M. holsaticum)、堪薩斯分枝桿菌(M. kansasii)、熊本分枝桿菌(M. kumamotonense)、緩黃分枝桿菌M. mantenii亞種、摩納哥分枝桿菌(M. monacense)、膿毒分枝桿菌(M. septicum)和膿毒分枝桿菌M.stomatepiae亞種各1株(0.25%)。 結論涂片形態(tài)學和結核分枝桿菌抗原膠體金兩種方法是鑒別MTBC與NTM的快速、簡便、準確的方法,兩者聯(lián)合使用,可提高菌種鑒定的準確性,適用于分枝桿菌培養(yǎng)物的初步鑒定。2009-2010年福建省NTM臨床分離率為11.0%,NTM種類多,以鳥-胞內(nèi)分枝桿菌復合群(MAC)為福建省NTM的主要流行菌種,占總數(shù)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.
【學位授予單位】:福建醫(yī)科大學
【學位級別】:碩士
【學位授予年份】:2013
【分類號】:R378.91

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