食品科学 ›› 2010, Vol. 31 ›› Issue (10 ): 287-291.doi: 10.7506/spkx1002-6630-201010063

• 分析检测 • 上一篇    下一篇

免疫磁珠捕获结合荧光PCR 技术检测食品中黄曲霉菌的研究

苏惠玉1,谢荣珍2,牛建军2   

  1. 1.厦门医学高等专科学校 2.厦门市疾病预防控制中心
  • 收稿日期:2010-02-15 出版日期:2010-05-15 发布日期:2010-12-29
  • 基金资助:

    厦门市科技计划项目(3502Z20064028)

Immunomagnetic Capture-Fluorescent PCR (IMC-FPCR) for Rapid Detection of Aspergillus flavus in Foods

SU Hui-yu1,XIE Rong-zhen2,NIU Jian-jun2   

  1. 1. Xiamen Medical College, Xiamen 361008, China;
    2. Center for Disease Prevention and Control of Xiamen City, Xiamen 361021, China
  • Received:2010-02-15 Online:2010-05-15 Published:2010-12-29

摘要:

目的:研究利用免疫磁珠对食品中黄曲霉菌进行捕获的技术,为检测食品中污染的黄曲霉菌提供新方法。方法:应用山羊抗黄曲霉菌血清的免疫磁珠捕获食品中的黄曲霉菌,不需要进行增菌培养,应用磁捕获- 荧光聚合酶链式反应(IMC-FPCR)技术快速检测鉴定食品中的黄曲霉菌。结果:IMC-FPCR 方法检测黄曲霉菌的最低检测值为2CFU/mL。应用IMC-FPCR 对从市场上购买的12 种食品进行检测,发现有两份样品含有产毒素相关基因(即为可能的致癌菌株),检出率为16.7%,其中花生中检出1 株黄曲霉菌,面线中检出1 株黄曲霉菌。结论:建立了黄曲霉菌的磁捕获- 荧光聚合酶链式反应(IMC-FPCR)方法,该方法可用于食品中黄曲霉菌的快速检测及鉴定,实物检测结果提示市场上食品有被真菌污染。

关键词: 黄曲霉菌, 免疫磁珠, 荧光PCR, 快速检测

Abstract:

An immunomagnetic bead based technique combined with fluorescent PCR assay was developed for the detection of Aspergillus flavus in foods. Aspergillus flavus in foods could be captured with the immunomagnetic beads coated with goat antiserum against Aspergillus flavus without the requirement for fungal enrichment and rapidly detected by fluorescent PCR assay. The IMC-FPCR assay exhibited a limit of detection of 2 CFU/mL. Two of 12 commercial food samples were detected by the IMC-FPCR assay to contain toxin genes from carcinogenic fungal strains and the detection rate was 16.7% and one Aspergillus flavus strain was detected in peanut and Xiamen ready-to-eat noodles, respectively. This assay is most suitable for the rapid detection of Aspergillus flavus in foods.

Key words: Aspergillus flavus, immunomagnetic beads, fluorescent PCR, rapid detection

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