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食品中产单核细胞李斯特菌PCR检测方法的建立

作  者:
白艳艳;张彦明;郑增忍;张衍海;龚振华;张宝
单  位:
西北农林科技大学动物医学院;中国动物卫生与流行病学中心
关键词:
产单核细胞李斯特菌;PCR;检测
摘  要:
根据产单核细胞李斯特菌hlyA基因设计引物,进行PCR扩增,检测该方法的特异性和灵敏度。人工污染样品经Half-fraser和Fraser增菌后进行PCR检测。结果表明,产单核细胞李斯特菌扩增出234bp的条带,对照菌未扩增出目的条带。该方法的灵敏度为104cfu/mL。人工污染样品的检出限为8cfu/25g,说明PCR方法检测食品中产单核细胞李斯特菌具有快速、特异、敏感等特点,具有较高的实用价值。
译  名:
Establishment of PCR detection Method for Listeria monocytogenes in Food
作  者:
BAI Yan- yan1) ZHANG Yan- ming1) ZHENG Zeng- ren2) ZHANG Yan- hai2) GONG Zhen- hua2) ZHANG Bao1) (1.College of Animal Science and Technology, Northwest A& F University, Yangling, Shaanxi 712100, China; 2. Animal health and Epidemiology Center of China, Qingdao, Shandong 266032 ,China )
关键词:
Listeria monocytogenes; PCR; detection
摘  要:
A PCR was established for the detection of Listeria monoeytogenes (LM) in food with a pair of primers specific to the LM hly A gene. The sensitivity and specificity of this method were detected. The procedure was validated by detecting Listeria monocytogenes in artificially contaminated food and PCR analysis was taken following Half- fraser and fraser enrichment steps. The specific 234 bp fragment was amplified in LM while none was ampli- fied in all other species. The specificity is 104 cfu /mL.As few as 8 cfu /25 g can be detected in artificially con- taminated food. The PCR procedure has proved to be a rapid sensitive and specific method suitable for detecting Listeria monocytogenes in food.

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