食品科学 ›› 2006, Vol. 27 ›› Issue (12): 607-611.

• 分析检测 • 上一篇    下一篇

应用PCR快速检测食品中沙门氏杆菌方法的研究

 吕世明, 陈杖榴, 陈建新, 李春梅, 邱电   

  1. 华南农业大学兽医学院 ;贵州大学动物科学学院;
  • 出版日期:2006-12-15 发布日期:2011-11-23

Study on the PCR Method of Rapid Detection to Salmonella in Food Samples

Lv Shi-Ming , CHEN  Zhang-Liu, CHEN  Jian-Xin, LI  Chun-Mei, QIU  Dian   

  1. 1.College of Veterinary, South China Agricultural University, Guangzhou 510642, China; 2.College of Animal Science, Guizhou University, Guiyang 550025, China
  • Online:2006-12-15 Published:2011-11-23

摘要: 本研究利用沙门氏杆菌属特异的invA基因序列,设计一对特异性的引物,通过PCR反应来检测多种样品中的沙门氏杆菌;反应的特异性和敏感性以及反应的最适条件等试验的结果显示:此PCR方法检测沙门氏菌属的特异性为100%;样品中活菌的检测限为1.43CFU/10g;反应的最佳退火温度是65℃;最适模板浓度范围在104~108copies/ml。本方法与传统的沙门氏杆菌检测方法以及最近报道的相关方法比较,具有简单、快速、特异性好和敏感性高、经济等特点,并可满足大批样品沙门氏杆菌筛选检测的要求。

关键词: PCR检测, 沙门氏菌, 模板, 引物, 特异性

Abstract: In this study, a pair of specificity primers designed basis on the Salmonella’s inv A genome sequence, then ,the tests of the specificity and sensitivity of Salmonella and the optimal conditions of PCR (optimal anneal temperature, optimal concentration of templates, etc.) had been discussed . The results showed that the specificity of this method to detect Salmonella is 100% and the limit of detection is 1.43CFU/l0g/ sample, the best anneal temperature of the PCR test is 65℃, the best template concentration is between 104~108copies/ml. The result of the experiments demonstrated that the PCR assay is a rapid, simple, economic and more specific, sensitive to traditional culture for the detection of Salmonella in the food samples, and available for screening of Salmonella in a large number of food samples.

Key words: PCR detection, Salmonella, template, primers, specificity