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双重PCR检测沙门氏菌和变形杆菌方法的建立

Journal of Tianjin Medical University(2015)

Cited 4|Views8
Abstract
目的:建立快速鉴定腹泻患者粪便标本中沙门氏菌和变形杆菌的双重聚合酶链式反应(PCR)方法.方法:针对沙门氏菌属特异基因invA和变形杆菌属特异基因tuf分别设计特异性引物,将天津某医院肠道门诊腹泻患者粪便标本经SS培养基分离培养后,对可疑菌株同时进行invA-tuf基因双重PCR鉴定和生化鉴定,比较两种方法结果的一致性;对沙门氏菌进一步行血清学分型.结果:双重PCR和生化反应都各自鉴定得到沙门氏菌31株和变形杆菌62株,而且二者鉴定结果完全一致;31株沙门氏菌包括鼠伤寒、肠炎等常见血清型和格兰扁、菲尔摩雷等罕见血清型,均能扩增出283 bp长度片段,62株变形杆菌包括48株奇异变形杆菌、8株普通变形杆菌、2株潘氏变形杆菌、4株产黏液变形杆菌,均能扩增出541bp长度片段.结论:invA-tuf基因双重PCR方法能够快速可靠地鉴定SS培养基上生长的沙门氏菌和变形杆菌.
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