食品科学 ›› 2011, Vol. 32 ›› Issue (18): 176-179.doi: 10.7506/spkx1002-6630-201118037

• 分析检测 • 上一篇    下一篇

产酪胺粪肠球菌和屎肠球菌PCR检测方法的建立

舒蕊华1,卢士玲2,徐幸莲1,*   

  1. 1.南京农业大学 教育部肉品加工与质量控制重点实验室 2.石河子大学食品学院
  • 出版日期:2011-09-25 发布日期:2011-09-24
  • 基金资助:
    国家“863”计划项目(2010AA10Z303)

Development of A PCR Assay for Detection of Tyramine-producing Enterococcus faecalis and Enterococcus faecium

SHU Rui-hua1,LU Shi-ling2,XU Xing-lian1,*   

  1. (1. Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China;2. College of Food, Shihezi University, Shihezi 832003, China)
  • Online:2011-09-25 Published:2011-09-24

摘要: 目的:建立快速简便地检测产酪胺粪肠球菌(Enterococcus faecalis)和屎肠球菌(Enterococcus faecium)的PCR方法。方法:将粪肠球菌和屎肠球菌的酪氨酸脱羧酶基因与GenBank数据库中已公布的细菌的酪氨酸脱羧酶基因进行比对,根据它们的非保守序列,分别设计粪肠球菌和屎肠球菌的特异性引物,建立检测产酪胺粪肠球菌和屎肠球菌的PCR方法。结果:根据非保守序列,分别设计粪肠球菌和屎肠球菌的特异性引物,用27株细菌对这两对引物分别进行反复验证,结果显示,所设计的两对引物都只对其目的菌株产生特异性扩增,对其他菌株没有扩增,方法的检测限可达到1.0×102CFU/mL。结论:本方法具有良好的特异性、稳定性和灵敏性,可用作食品中产酪胺粪肠球菌和屎肠球菌的检测。

关键词: 粪肠球菌, 屎肠球菌, 酪氨酸脱羧酶基因, 聚合酶链式反应

Abstract: Objective: The aim of this study was to develop a PCR assay for the detection of tyramine-producing Enterococcus faecalis and Enterococcus faecium. Methods: The tyrosine decarboxylase genes (tdc gene) of Enterococcus faecalis and Enterococcus faecium were compared with those published in GenBank database, and specific primers were designed based on their nonconservative sequences to develop a PCR assay. Results: Each primer pair could only amplified their target gene from the associated ones of 27 bacterial strains tested. The detection limit of this assay was 1.0×102 CFU/mL. Conclusion: The developed PCR assay has good specificity, stability and sensitivity.

Key words: Enterococcus faecalis, Enterococcus faecium, tyrosine decarboxylase gene, polymerase chain reaction (PCR)

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