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EMA与PCR结合检测大肠杆菌O157方法的研究 被引量:3

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摘要 为了建立1种快速检测样品中大肠杆菌O157并能区分死细菌与活细菌的检测方法,将叠氮溴化乙锭(EMA)与PCR结合,以O157特有的抗原基因rfbE为靶基因,以O157的纯培养物为模板扩增,进行灵敏度、特异性、曝光时间及最佳EMA浓度筛选实验。结果显示:该检测方法的灵敏度为1.2×102CFU/mL,最佳曝光时间为1 min。终浓度≥1μg/mL的EMA,能有效抑制O157死菌的扩增,而当EMA终浓度≤16μg/mL时对活菌靶基因的扩增没有明显的抑制作用。EMA-PCR能有效减少O157活菌检测过程中假阳性结果的出现。
出处 《畜牧与饲料科学》 2014年第10期9-12,共4页 Animal Husbandry and Feed Science
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参考文献11

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