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改良分子信标-实时PCR快速检测志贺菌
Authors
刘小立
吴平芳
+10 more
庄志雄
张佳峰
张顺祥
扈庆华
李庆阁
林一曼
王冰
石晓路
贺连华
郑琳琳
Publication date
10 April 2006
Publisher
Abstract
目的:建立改良分子信标-实时PCR检测志贺菌的快速方法,应用于志贺菌食物中毒的快速诊断和门诊肠道致病菌的检测。方法:根据GenBank公布志贺菌ipaH基因的保守序列,设计引物和改良分子信标探针,建立实时PCR-改良分子信标检测体系,应用于对志贺菌食物中毒的快速诊断和门诊肠道致病菌的检测。结果:改良分子信标-实时PCR反应体系DNA灵敏度为93 fgμ/l,菌液灵敏度为64 cfu/m l或2 cfu/PCR反应体系,无交叉反应。此反应体系检测67株志贺菌,均出现特异的荧光信号。对细菌性食物中毒样本等共657份样品进行志贺菌检测,42份志贺菌实时PCR阳性,其中41份志贺菌细菌培养阳性。从样品处理到检测结果仅需2 h~1 d时间。结论:改良分子信标-实时PCR检测体系快速、灵敏度高,特异性强,可用于志贺菌食物中毒的快速诊断,为食源性疾病的分子流行病学调查提供新的检测手段,对于提高肠道门诊的工作效率有重要意义
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Last time updated on 16/06/2016