食品科学 ›› 2012, Vol. 33 ›› Issue (9): 182-187.doi: 10.7506/spkx1002-6630-201209038

• 生物工程 • 上一篇    下一篇

冰鲜鸡肉中3 种主要致病菌的共修复- 增菌条件研究

王虎虎,董 洋,闫振国,徐幸莲*,周光宏   

  1. 南京农业大学 教育部肉品加工与质量控制重点实验室
  • 出版日期:2012-05-15 发布日期:2012-05-07
  • 基金资助:
    国家现代农业产业技术体系建设专项(CARS-42)

Co-Recovery-Enrichment Conditions of Three Major Pathogenic Bacteria in Fresh Chicken Meat

WANG Hu-hu,DONG Yang,YAN Zhen-guo,XU Xing-lian*,ZHOU Guang-hong   

  1. (Key Laboratory of Meat Processing and Quality Control, Ministry of Education, Nanjing Agricultural University, Nanjing 210095, China)
  • Online:2012-05-15 Published:2012-05-07

摘要: 研究冰鲜鸡肉中鼠伤寒沙门氏菌(S. typhimurium)、单增李斯特菌(L.monocytogenes)和大肠杆菌(E. coli) O157:H7的共修复-增菌条件。通过传统技术和PCR技术相结合的方法,研究肉鸡屠宰浸烫脱毛工艺对3种目标菌的热激损伤及共修复-增菌条件,并利用共修复-增菌结果,对生产线和超市的冰鲜鸡肉样品中3种目标菌的污染状况进行调查。结果表明:肉鸡屠宰浸烫脱毛工艺条件能使部分S. typhimurium、L.monocytogenes和E. coli O157:H7处于亚致死状态;TSB-YE培养基对热损伤S. typhimurium、L.monocytogenes和E. coli O157:H7的修复效果最好,且对前两种菌的修复时间为2h,对后一种菌的修复时间为4h;TSB-YE培养基在16h对3种致病菌的共增菌效果最好;运用共修复-增菌条件,对80份实际样品中的3种致病菌检出率分别为:S. typhimurium 22.5% (18/80)、L.monocytogenes 11.3% (9/80)和E. coli O157:H7 18.8% (15/80)。

关键词: 冰鲜鸡肉, 致病菌, 热激损伤, 修复-增菌, PCR

Abstract: In order to detect S. typhimurium, Listeria monocytogenes and E. coli O157:H7 in fresh chicken accurately and rapidly, traditional and multiple PCR methods were combined to explore co-recovery-enrichment conditions of heat-injured S. typhimurium, Listeria monocytogenes and E. coli O157:H7 in this study. The results showed that the scalding process could bring S. typhimurium, Listeria monocytogenes and E. coli O157: H7 into a sub-lethal state. TSB-YE was the best medium that could repair sub-lethal pathogenic bacteria. The recovery time of S. typhimurium and Listeria monocytogenes was 2 h, and that of E. coli O157:H7 was 4 h. After 16 h of enrichment, the best enrichment results were obtained for S. typhimurium, Listeria monocytogenes and E. coli O157: H7 in TSB-YE medium Under these co-recovery-enrichment conditions, the positive rates of S. typhimurium, Listeria monocytogenes and E. coli O157:H7 in 80 samples were 22.5% (18/80), 11.3% (9/80) and 18.8% (15/80), respectively.

Key words: fresh chicken meat, pathogenic bacteria, heat-injured, recovery-enrichment, PCR

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