食品中副溶血弧菌荧光定量PCR方法快速检测

目的利用荧光定量PCR技术，建立食品中副溶血弧菌污染的快速、准确的定量检测方法。方法根据副溶血弧菌gyrase基因序列设计合成副溶血弧菌FQ-PCR诊断试剂盒，研究其灵敏度、特异性，并应用于模拟食品样本检测。结果在31株不同菌株的检测中，8株副溶血弧菌结果均为阳性，而其他23株弧菌科及其他菌属的菌株均为阴性；纯菌条件下定量检测低限10cfu／ml；对模拟样本直接进行，检测低限为10^3cfu／g，经培养增菌后，检测低限则达到2cfu／g。结论该方法特异性强、敏感性高，操作简便快速，检验周期仅需36h，扩增与检测在封闭单管进行，可避免常规PCR方法易污染缺陷，具有很好的推广应用前景。

Rapid detection of Vibrio parahaemolyticus in food by fluorescence quantitative PCR

Objective To construct a rapid and accurate detection method of Viborio parahaemolyticus with fulorescence quantitative PCR(FQ-PCR) in food. Methods A diagnodstic kit was developed according to the gyrase gene in Vibrio Parahaemolyticus.The sensitivity and specialty of method was assessed,and the method was applied to detect artificial contaminated food samples. Results The results of all eight strains of Vibrio parahemolyticus were positive,and the results of the other 23 strains respective belong to Vibrionaceae and other genus were negative.The quantitative detection limit of the mehtod was 10cfu/ml in pure clutured broth,and the detection limit of the method was 10~3 cfu/g and 2cfu/g in non-cultured and overnight-cultured artificial contaminated food samples respectively. Conclusion FQ-PCR method has high sensitivity and specialty.The method is handy and rapid,and the whole process can finish within 36hr.Compared with the conventional PCR method.FQ-PCR methods is insusceptible to operation contamination for the whole flow of PCR and detection shut in arreaction tube.FQ-PCR method has potential applied value in screening of foodborne pathogen.