生物技术通报 ›› 2014, Vol. 0 ›› Issue (7): 64-68.

• 技术与方法 • 上一篇    下一篇

三种食源性致病菌的多重PCR快速检测及应用

余倩, 黄梦娜   

  1. 仲恺农业工程学院 轻工食品学院, 广州 510225
  • 收稿日期:2014-01-06 出版日期:2014-07-15 发布日期:2014-07-16
  • 作者简介:余倩, 女, 博士, 副教授, 研究方向:应用微生物;E-mail:yuqianchina@126.com
  • 基金资助:
    广东省科技计划项目(2011B031500023)

Detection and Application of Three Food-borne Bacterial Pathogens by Multiplex PCR

Yu Qian, Huang Mengna   

  1. Zhongkai University of Agiculture and Engineering, Guangzhou 510225
  • Received:2014-01-06 Published:2014-07-15 Online:2014-07-16

摘要: 针对常见的3种食源性致病菌肠出血性大肠杆菌O157:H7 的rfbE基因、金黄色葡萄球菌的nuc基因及沙门氏菌的hilA基因, 使用Primer 5.0软件设计出相对应的特异性引物, 预计PCR产物的分子大小为287、354及468 bp。通过单一、双重及三重PCR对样品进行检测, 并对人工感染的鲜奶进行检测。结果表明, 3 种食源性致病菌的单一、双重和三重PCR 均能成功扩增出与预计大小一致的片段, 无非特异性扩增。人工感染食品的PCR 检测也获得了目的菌的特异性片段, 并且结果稳定。这说明此3对引物可分别用于3个菌靶基因的PCR检测。

关键词: 食源性致病菌, 肠出血性大肠杆菌O157:H7, 金黄色葡萄球菌, 沙门氏菌, PCR

Abstract: Food poisoning incidents have occurred by the pollution of food-borne pathogenic bacteria frequently. PCR meet the requirements of the rapid detection of pathogenic bacteria. The three primers was designed by primer 5.0 software of Enterohemorrhagic Escherichia coli O157:H7 rfbE gene, Staphyloccocus aureus nuc gene, Salmonella hilA gene. Three amplified segments of rfbE gene, nuc gene, hilA gene were 287 bp, 354 bp, 468 bp. The specificity and sensitivity of primers were verified by single, duplex and triplex-PCR reaction, and by detecting the foods artificially infected with the three pathogens. The results showed that three food-borne bacterial pathogens were amplified purpose fragments, and no non-specific fragments were amplified. It was obvious that there were the special fragments of the artificial food infected with three pathogens by PCR test. The three primers could be used for PCR detection of target genes about three bacteria.

Key words: Food-borne pathogenic bacteria, Enterohemorrhagic, Escherichia coli O157:H7 , Staphyloccocus aureus Salmonella PCR