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IS986 DNA指纹法应用于香港肺结核病人短程化学治疗前、中和后的连续分支杆菌分离株

Application of DNA fingerprinting with IS986 to sequential mycobacterial isolates obtained from pulmonary tuberculosis patients in Hong Kong before, during and after short-course chemotherapy
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摘要 把总共266株结核分支杆菌分离株做DNA RFLP分析。分离株是从短程化疗并随访2年的病人的每月痰培养中获得的,分别来自42名短程化疗后复发的病人和42名化疗后仅一次培养阳性的病人,包括治疗前分离的1株和治疗期间最后一次分离的1株分离株,以及复发期间相距至少2个月培养的2株式化疗后分离的1株分离株。在DNA RFLP分析前先编码,然后用肉眼观察相同的或几乎相同的带型进行分组。译码后,每位病人显然是被1个具有不同带型(即指纹图谱)的菌株感染的。100对治疗前分离株与化疗期间最后一次的培养菌株或复发期间第一次分离株与第二次分离株的配对比较中,15对带型不同;其中4对复查后发现是由于阅读错误所致(错误率1.5%),其余11对(11%)带型明显不同。42对复发病人中,5对(12%)复发分离株的指纹图谱与治疗前分离株有显著差别。相反,40对化疗后的孤立的阳性培养菌株与最初的分离株的配对比较中,36对(90%)的指纹图谱有显著差别。无法确定这其余的10—12%的指纹差别多少是由于临床混合感染,多少是实验室交叉污染所致。84名病人的连续分离株中,7名(8%)显示一步1或2条带的增多或减少,提示指纹图型的演变。RELP指纹方法作为鉴别菌株的手段显然优于噬菌体分型。
出处 《国际结核病与肺部疾病杂志》 1995年第3期100-103,共4页 The International Journal of Tuberculosis and Lung Disease
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参考文献10

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