Semret Makeda, Turenne Christine Y, Behr Marcel A
McGill University Health Center, Montreal, Quebec, Canada.
J Clin Microbiol. 2006 Mar;44(3):1081-3. doi: 10.1128/JCM.44.3.1081-1083.2006.
Many studies investigating Mycobacterium avium subsp. paratuberculosis in Crohn's disease have used molecular detection of IS900 in clinical samples, but some have described polymorphisms in IS900 as variants of this organism. Analysis of 23 M. avium subsp. paratuberculosis isolates revealed that IS900 is highly conserved, with only two sequevars distinguishing sheep and cattle lineages. Amplification of IS900-like sequences is not sufficient as a proxy for M. avium subsp. paratuberculosis.
许多针对克罗恩病中副结核分枝杆菌的研究,在临床样本中使用了IS900的分子检测方法,但一些研究将IS900中的多态性描述为该生物体的变体。对23株副结核分枝杆菌分离株的分析表明,IS900高度保守,只有两个序列型可区分绵羊和牛的谱系。IS900样序列的扩增不足以作为副结核分枝杆菌的替代指标。