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Position: Home > Articles > PCR Detection of Escherichia coli O157 in Food and Sequencing of wzy Gene FOOD SCIENCE 2010,31 (12) 193-196

食品中大肠杆菌O157的PCR检测与wzy基因的测序分析

作  者:
李睿;张忠美;戴诗皎;孙言凤;黄万琪
单  位:
武汉工业学院生物与制药工程学院
关键词:
大肠杆菌O157;PCR检测;wzy基因;测序
摘  要:
大肠杆菌O157:H7和O157:H-是重要食品致病菌。从食品中分离得到一株O157:H7菌株EC5。将该菌株PCR扩增wzy基因全长并克隆测序。结果表明,wzy基因序列与大肠杆菌O157:H7标准株EDL933有100%同源性。从NCBIGenBank数据库下载O157菌株wzy基因序列,针对保守序列设计引物并扩增O157菌株和非O157菌株。PCR结果表明,wzy基因特异性强,可作为检测O157菌株的标志基因。本研究为开发大肠杆菌O157的分子检测技术提供新的研究思路。
译  名:
PCR Detection of Escherichia coli O157 in Food and Sequencing of wzy Gene
作  者:
LI Rui,ZHANG Zhong-mei,DAI Shi-jiao,SUN Yan-feng,HUANG Wan-qi*(College of Biological and Pharmaceutical Engineering,Wuhan Polytechnic University,Wuhan 430023,China)
关键词:
Escherichia coli O157;PCR detection;wzy gene;sequencing
摘  要:
A strain of Escherichia coli O157:H7 was isolated from fresh beef and named EC5.EC5 was subjected to PCR amplification and sequencing of full-length wzy gene.There was a 100% similarity between the wzy gene sequence of EC5 and that of Escherichia coli O157:H7 EDL933.Specific primers were designed based on the conserved locus of wzy gene sequences known from NCBI GenBank database for differentiating O157 strains from non-O157 ones by PCR assay.Our findings demonstrate that the wzy gene amplified by PCR is highly specific and provides a promising marker gene for the detection of Escherichia coli O157:H7.

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