多重实时PCR快速同时检测沙门菌和志贺菌

被引:40
作者
石晓路 [1 ]
扈庆华 [1 ]
张佳峰 [2 ]
李庆阁 [2 ]
王冰 [1 ]
林一曼 [1 ]
庄志雄 [1 ]
刘小立 [1 ]
张顺祥 [1 ]
机构
[1] 深圳市疾病预防控制中心
[2] 厦门大学生命科学学院
关键词
沙门菌; 志贺菌; 多重实时聚合酶链反应; 同步检测;
D O I
暂无
中图分类号
R450 [];
学科分类号
摘要
目的建立改良分子信标-多重实时PCR同时检测沙门菌和志贺菌的快速方法,应用于食源性致病菌的快速诊断。方法根据GenBank公布的沙门菌侵袭性基因invA和ssaR基因,分别设计一对引物和改良分子信标探针,用同色荧光标记,用于同体系检测沙门菌。志贺菌根据ipaH基因的保守序列,设计引物和改良分子信标探针,加入沙门菌检测体系中,建立三重实时PCR-改良分子信标检测体系,应用于同时对沙门菌、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-多重实时PCR反应体系DNA灵敏度为69-93 fg/μl,菌液灵敏度为32-64 CFU/ml或1-2 CFU/PCR反应体系,无交叉反应。该反应体系同时检测134株沙门菌和67株志贺菌,均出现特异的荧光信号,两种细菌检测互不干扰。对细菌性食物中毒样本等共1100份同时进行沙门菌和志贺菌检测,569份沙门菌实时PCR阳性,其中551份沙门菌培养阳性;42份志贺菌实时PCR阳性,其中41份志贺菌培养阳性。从样品处理到检测结果仅需时间2 h至1 d。结论改良分子信标-多重实时PCR检测体系快速、灵敏度高,特异性强,可用于沙门菌和志贺菌食物中毒的快速诊断,伤寒、痢疾等肠道传染病的初筛及预防医学门诊的健康人群体检,为食源性疾病的分子流行病学调查提供新的检测手段。
引用
收藏
页码:1053 / 1056
页数:4
相关论文
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