多响应曲面优化-毛细管电泳-激光诱导荧光快速检测食源性致病菌

被引:7
作者
渠凌丽
黎源倩
郑波
何成艳
何玲
李永新
机构
[1] 四川大学华西公共卫生学院卫生检验教研室
关键词
多响应曲面优化; 毛细管电泳; 激光诱导荧光检测; 食源性致病菌; 多重PCR;
D O I
暂无
中图分类号
TS207.4 [食品的微生物检验];
学科分类号
083201 ;
摘要
建立了食品中常见致病菌:沙门菌的invA基因、大肠杆菌O157∶H7的rfbO157基因、志贺菌的ipaH基因及副溶血性弧菌Vpara(16S-23S rDNA IGS)基因的多重PCR产物-毛细管电泳快速检测方法.根据沙门菌、大肠杆菌O157∶H7、志贺菌及副溶血性弧菌的特异性基因保守序列设计出多重PCR引物,优化PCR扩增反应体系.采用多响应曲面法优化毛细管电泳的分离条件,以含有DNA荧光染料SYBR GreenⅠ的1.0%甲基纤维素为筛分介质,通过毛细管电泳-激光诱导荧光同时检测4种常见致病菌的PCR扩增产物.在优化的多重PCR反应体系和毛细管筛分电泳条件下,此方法可以同时检测出沙门菌的invA基因、大肠杆菌O157∶H7的rfbO157基因、志贺菌的ipaH基因及副溶血性弧菌Vpara(16S-23S rDNA IGS)基因的多重PCR扩增产物,25 min内即可完成检测.迁移时间的日内相对标准偏差为0.92%~1.58%.通过多响应曲面的优化,有效改善了毛细管电泳对DNA分子的分离能力.
引用
收藏
页码:1121 / 1127
页数:7
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