Kusunoki S, Ezaki T, Tamesada M, Hatanaka Y, Asano K, Hashimoto Y, Yabuuchi E
Research and Development Center, Kobayashi Pharmaceutical Co., Osaka, Japan.
J Clin Microbiol. 1991 Aug;29(8):1596-603. doi: 10.1128/jcm.29.8.1596-1603.1991.
Quantitative microdilution plate hybridization was used to identify 22 Mycobacterium species. DNAs of clinical strains were rapidly extracted and labeled with photoreactive biotin. Labeled DNAs were distributed into wells of a microdilution plate in which reference DNAs had been immobilized. After 2 h of hybridization, hybridized DNAs were quantitatively detected with peroxidase-conjugated streptavidin and the substrate, tetramethylbenzidine. This method could differentiate among 20 of the 22 Mycobacterium species tested. The type strains of Mycobacterium tuberculosis and M. bovis were genetically highly related and could not be differentiated by this method. Of 194 biochemically identified human clinical strains, 178 (90%) were genetically identified within 3 h of the small-scale DNA extraction.
采用定量微量稀释板杂交法鉴定22种分枝杆菌。临床菌株的DNA被快速提取并用光反应性生物素标记。将标记的DNA分布到已固定参考DNA的微量稀释板孔中。杂交2小时后,用过氧化物酶偶联的链霉亲和素和底物四甲基联苯胺对杂交的DNA进行定量检测。该方法可以区分所测试的22种分枝杆菌中的20种。结核分枝杆菌和牛分枝杆菌的标准菌株在基因上高度相关,无法用该方法区分。在194株经生化鉴定的人类临床菌株中,178株(90%)在小规模DNA提取后3小时内得到基因鉴定。