食品科学 ›› 2010, Vol. 31 ›› Issue (22): 322-325.doi: 10.7506/spkx1002-6630-201022070

• 分析检测 • 上一篇    下一篇

环介导等温扩增法快速检测阪崎肠杆菌

马寅众1,陈江源2,房国梁1,李 琦1,李 睿1,周帼萍1,刘志国1 ,*   

  1. 1.武汉工业学院生物与制药工程学院
    2.江汉大学卫生职业技术学院
  • 收稿日期:2010-06-30 修回日期:2010-10-11 出版日期:2010-11-25 发布日期:2010-12-29
  • 通讯作者: 刘志国 E-mail:zhiguo_l@126.com
  • 基金资助:

    武汉市科技局对外科技合作与交流计划项目(201070934341);武汉工业学院研究生创新基金重点项目(09cx002

Rapid Detection of Enterobacter sakazakii by LAMP

MA Yin-zhong1,CHEN Jiang-yuan2,FANG Guo-liang1,LI Qi1,LI Rui1,ZHOU Guo-ping1,LIU Zhi-guo1,*   

  1. (1. School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan 430023, China;
    2. School of Health Science, Jianghan University, Wuhan 430016, China)
  • Received:2010-06-30 Revised:2010-10-11 Online:2010-11-25 Published:2010-12-29
  • Contact: LIU Zhi-guo1 E-mail:zhiguo_l@126.com

摘要:

目的:研究阪崎肠杆菌的环介导等温扩增(loop-mediated isothermal amplification,简称LAMP)方法,实现对食品中阪崎肠杆菌的快速检测。方法:针对阪崎肠杆菌16S rRNA 基因(16S rDNA)及外膜蛋白A(OmpA)基因设计LAMP 引物,扩增后通过电泳或加入显色剂SYBR-GREEN Ⅰ检测。结果:LAMP 法能有效特异地检测出阪崎肠杆菌;以16S rRNA 引物检测阪崎肠杆菌的最低检出限为32CFU/mL,用OmpA 引物检测阪崎肠杆菌的最低检出限达3CFU/mL,扩增产物加入SYBR-GREEN Ⅰ在紫外条件下可见荧光,与电泳检测具有同样的灵敏度。结论:LAMP 法可实现对阪崎肠杆菌的快速检测,在食品检测中具有广阔的应用前景。

关键词: 阪崎肠杆菌, 环介导等温扩增, 快速检测

Abstract:

Objective: To develop a loop-mediated isothermal amplification (LAMP) method for rapid detection of Enterobacter sakazakii in food. Methods: LAMP primers were designed on the basis of 16S rRNA gene (16S rDNA) and outer membrane protein A gene (OmpA) in Enterobacter sakazakii. The LAMP products were evaluated by electrophoresis or SYBR-GREEN I. Results: The detection limit of Enterobacter sakazakii by LAMP assay was 32 CFU/mL using 16S rRNA primers or 3 CFU/mL using OmpA primers. The similar detection sensitivity of LAMP products using SYBR-GREEN I and electrophoresis was observed. Conclusion: LAMP method was effective and sensitive for rapidly detecting Enterobacter sakazakii, which will have a broad application prospect in food.

Key words: Enterobacter sakazakii, loop-mediated isothermal amplification, detection

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