Gomez-Flores R, Gupta S, Tamez-Guerra R, Mehta R T
University of Texas M. D. Anderson Cancer Center, Houston 77030, USA.
J Clin Microbiol. 1995 Jul;33(7):1842-6. doi: 10.1128/jcm.33.7.1842-1846.1995.
We investigated the potential of a rapid colorimetric microassay based on the reduction of dimethylthiazol-diphenyltetrazolium bromide (MTT) for determining the growth of Mycobacterium avium-M. intracellulare complex (MAC) and MICs of clofazimine, resorcinomycin A, and the quinolone PD 127391 against MAC. The reduction of MTT was directly proportional to the number of viable bacteria. A comparison of the MTT reduction test with the [3H]glycerol uptake assay showed the former to possess higher analytical sensitivity for detecting MAC growth in microtiter plates. The MIT reduction test avoids the use of radioisotopes and costly material and equipment; it is reliable, reproducible, and convenient for rapid routine susceptibility testing of MAC.
我们研究了基于溴化二甲噻唑二苯基四氮唑(MTT)还原反应的快速比色微量测定法在测定鸟分枝杆菌-胞内分枝杆菌复合体(MAC)生长以及氯法齐明、间苯二酚霉素A和喹诺酮PD 127391对MAC的最低抑菌浓度(MIC)方面的潜力。MTT的还原与活菌数量成正比。将MTT还原试验与[³H]甘油摄取试验进行比较,结果表明前者在检测微量滴定板中MAC生长方面具有更高的分析灵敏度。MTT还原试验避免了使用放射性同位素以及昂贵的材料和设备;它可靠、可重复,并且便于对MAC进行快速常规药敏试验。