食品科学

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纳米免疫磁分离-实时荧光聚合酶链式反应快速检测海产品中副溶血性弧菌

张 蕾1,2,曾 静1,*,魏海燕1,马 丹1,程晋霞2,张西萌1,张海予2   

  1. 1.北京出入境检验检疫局,北京 100026;2.北京农学院,北京 102206
  • 出版日期:2014-02-25 发布日期:2014-03-17
  • 通讯作者: 曾 静
  • 基金资助:

    国家质检总局公益性行业科研专项(201110034);国家质检总局科技计划项目(2009IK184)

A Novel Method of Nano-Immunomagnetic Separation-Real Time-Polymerase Chain Reaction for Detecting Vibrio parahaemolyticus in Seafoods

ZHANG Lei1,2, ZENG Jing1,*, WEI Hai-yan1, MA Dan1, CHENG Jin-xia2, ZHANG Xi-meng1, ZHANG Hai-yu2   

  1. 1. Beijing Entry-Exit Inspection and Quarantine Bureau, Beijing 100026, China;
    2. Beijing University of Agriculture, Beijing 102206, China
  • Online:2014-02-25 Published:2014-03-17
  • Contact: ZENG Jing

摘要:

采用副溶血性弧菌单克隆抗体、纳米免疫磁分离技术,结合实时荧光聚合酶链式反应(polymerase chain reaction,PCR)检测方法,建立海产品中副溶血性弧菌纳米免疫磁分离-实时荧光PCR检测方法。副溶血性弧菌纳米免疫磁珠在菌体浓度为103 CFU/mL水平时,对副溶血性弧菌的捕获率达到74%。在纯培养、无需增菌情况下,该方法检测灵敏度达到140 CFU/mL;通过134 株副溶血性弧菌和74 株非目标菌的测试,实时荧光PCR技术具有良好的特异性;在食品基质添加实验中,其检测限为2 CFU/25 g样品,增菌时间缩短到8 h。

关键词: 副溶血性弧菌, 免疫磁分离, 实时荧光聚合酶链式反应

Abstract:

A novel method using monoclonal antibody of Vibrio parahemolyticus, nano-immunomagnetic separation (Nano-
IMS) plus real-time polymerase chain reaction (RT-PCR) was established for detecting Vibrio parahemolyticus in seafoods.
The nano-immunomagnetic beads (Nano-IMB) created showed a capture rate for Vibrio parahemolyticus of 74% at a
bacterial concentration of 103 CFU/mL. The sensitivity of Nano-IMS-PCR was 140 CFU/mL under pure culture conditions
without enrichment. The RT-PCR method was highly specific for 134 Vibrio parahemolyticu and 74 non-target bacteria. The
detection limit of the method reached 2 CFU/25 g in artificial food samples. The enrichment time was shortened to 8 h.

Key words: Vibrio parahaemolyticus, nano-immunomagnetic separation, real time-polymerase chain reaction

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