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探针熔解分析法快速检测结核分枝杆菌链霉素耐药突变
Authors
张向东
张婷
+4 more
李庆阁
温慧欣
牛建军
胡思玉
Publication date
15 January 2011
Publisher
Abstract
目的评价探针熔解分析法快速检测结核分枝杆菌链霉素耐药突变的应用价值,为临床应用提供依据。方法首先用中国药品生物制品检定所提供的含37份标准非结核分枝杆菌的标准盘进行特异性评价,然后将野生型结核分枝杆菌H37Rv基因组DNA梯度稀释进行灵敏度考察,最后对906株结核分枝杆菌临床分离株(其中37份有药物敏感性试验结果)的链霉素耐药相关基因进行检测,并对突变菌株、有药敏结果的菌株以及疑似杂合的菌株进行测序分析。结果标准盘评价结果证实该体系特异检测H37Rv结核分枝杆菌。分析灵敏度为5~50拷贝每反应。在所有的906份结核分枝杆菌培养标本中,103份标本发生突变且与测序结果一致,18份标本存在杂合信号,17份标本无信号。37份有药敏结果的标本中,敏感的标本用探针熔解分析法所得结果均为野生型,耐药的16份标本仅检测到7份突变,另有9份耐药的标本实时检测为野生型,与测序结果相符。结论探针熔解分析技术特异性好,可以快速、准确地检测结核分枝杆菌链霉素耐药常见突变,有望直接用于临床标本链霉素耐药性检测
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Last time updated on 16/06/2016