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应用EMA-PCR检测沙门氏菌活菌的研究 被引量:2

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摘要 根据沙门氏菌保守的侵袭蛋白A(invasion protein A,invA)基因序列设计特异性引物,对实验菌株进行PCR检测,结果只有沙门氏菌能扩增出大小为285bp的特异性条带,而其他对照菌株未扩增出条带。本研究利用EMA能穿过死细菌的细胞膜并在光激活的作用下能与基因组DNA共价结合,从而能抑制死菌DNA进行PCR扩增的特性,建立了一种快速、有效的检测沙门氏菌活菌的EMA-PCR方法,从而避免了因分析的样品中含有死细菌而造成的假阳性检测结果。该方法较传统PCR大大提高了检测的准确性和真实性,检测灵敏度可达11CFU/ml。
出处 《中国畜牧兽医文摘》 2012年第10期46-47,43,共3页
基金 国家支撑计划(2006BAD04A17 2012BAD12B03) 四川省支撑计划(2010NZ0106) 国家奶牛产业技术体系科学家岗位项目 四川生猪现代产业体系项目
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