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unknown
改良分子信标-实时PCR快速检测产单核李斯特菌
Authors
张顺祥
扈庆华
+6 more
李庆阁
林一曼
王冰
石晓路
贺连华
郑琳琳
Publication date
10 June 2006
Publisher
Abstract
目的:建立改良分子信标-实时PCR检测产单核李斯特菌(LMO)的快速方法,应用于食品中LMO的污染状况调查及食物中毒快速诊断。方法:根据GenBank公布的LMO hlyA基因的保守序列,设计引物和改良分子信标探针,建立改良分子信标-实时PCR检测体系,应用于食品中LMO检测。结果:改良分子信标-实时PCR反应体系DNA灵敏度为110 fg,菌液灵敏度为99 cfu/m l或4 cfu/PCR反应体系,无交叉反应。以此反应体系检测28株LMO,均出现特异的荧光信号。上述方法可将检测时间由原来的至少4 d缩短至1 d。对228份食品进行LMO检测,8份增菌液LMO实时荧光PCR阳性,其中6份LMO细菌培养阳性。结论:改良分子信标-实时PCR反应体系快速、灵敏度高,特异性强,能提高LMO的检出率和准确性,可应用于LMO食品污染状况调查及食物中毒的快速诊断
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Last time updated on 16/06/2016