• 关键词：多重PCR  大肠杆菌  沙门氏菌  金黄色葡萄球菌  福氏志贺氏菌  铜绿假单胞菌  土壤

• 基金项目：国家高技术研究发展计划项目(No. 2006AA06Z352);江苏省普通高校自然科学研究计划资助项目(No. 10KD610001)

• 何伟
• 1. 南京师范大学地理科学学院, 南京 210023;
  2. 南京师范大学生命科学学院, 南京 210023

• 刘燕
• 南京师范大学地理科学学院, 南京 210023

• 李建林
• 南京师范大学金陵女子学院, 南京 210097

• 尹睿
• 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所), 南京 210008

• 钟文辉
• 南京师范大学地理科学学院, 南京 210023

• 摘要：建立同时检测大肠杆菌、沙门氏菌、金黄色葡萄球菌、福氏志贺氏菌、铜绿假单胞菌等5种土壤常见肠道致病菌的多重PCR检测技术,为这些肠道致病菌感染的快速诊断提供实验依据.根据这些肠道病原菌的毒素基因、高度保守基因及特异性基因分别合成5对特异性引物,应用PCR扩增技术对目的菌株进行特异性检测.实验结果表明,5对寡核苷酸引物都具有较高的特异性和专一性,多重PCR检测限达到10⁴ cfu·g^-1.多重PCR应用于土壤样品分析,极大的缩短了检测时间(仅需3~4 h)、降低了检测成本,对控制病原菌的传播具有重要意义,可推广应用于环境监测、水源检测、食品卫生监督、商品检验检疫等领域.

• Abstract：To provide an experimental evidence for rapid diagnosis of those pathogenic infection, multiplex-PCR assay was conducted to simultaneously detect Escherichia coli, Salmonella, Staphylococcus aureus, Shigella flexneri and Pseudomonas aeruginosa in soil. According to the toxin genes, the high-conservative genes and specific genes of the pathogenic enterobacterial strains, five primer sets were selected to simultaneously detect the pathogenic enterobacterial strains by multiplex-PCR method. The results showed that the multiplex-PCR using these five primer sets produced specific amplicons of expected sizes and the detection limits for the bacterial targets were estimated at 10⁴cfu·g^-1. Multiplex-PCR analysis, applied in analysis of soil samples, could greatly shorten the detection time (only need 3 to 4 hours). It provided a cost-effective way to detect and control the transmission of pathogens and also could be extended and applied to other fields, such as environmental inspection, water detection, food sanitation supervision, commodity inspection and detection, etc.

• Key words：multiplex-PCR  Escherichia coli  Salmonella  Staphylococcus aureus  Shigella flexneri  Pseudomonas aeruginos  soil

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