生物技术通报 ›› 2013, Vol. 0 ›› Issue (2): 172-176.

• 研究报告 • 上一篇    下一篇

阪崎肠杆菌胶体金试纸条的制备及初步应用

周鹤峰1 邵敏1 李长福2 葛正龙2   

  1. (1. 遵义医学院珠海校区生物工程系,珠海 519041; 2. 遵义医学院生物化学教研室,遵义 563003)
  • 收稿日期:2012-08-08 修回日期:2013-02-27 出版日期:2013-02-26 发布日期:2013-02-27
  • 作者简介:周鹤峰,男,硕士,副教授,研究方向:医药生物技术;E-mail :hfztim@163.com
  • 基金资助:
    贵州省卫生厅优秀医学青年科技人才基金项目(gzwkj2010-2-002)

Preparation and Primary Application of Enterobacter sakazakii Colloidal Gold Test Strip

Zhou Hefeng1 Shao Min1 Li Changfu2 Ge Zhenglong1   

  1. (1 Department of Bioengineering,Zunyi Medical College Zhuhai Campus,Zhuhai 519041 ;2Department of Biochemistry,Zunyi Medical College,Zunyi 563003)
  • Received:2012-08-08 Revised:2013-02-27 Published:2013-02-26 Online:2013-02-27

摘要: 制备阪崎肠杆菌(Enterobacter sakazakii,ES)胶体金快速检测试纸并对其性能进行评价。通过柠檬酸三钠法制备胶体金颗粒,标记抗阪崎肠杆菌特异性的单克隆抗体,采用双抗夹心法,将标记的胶体金复合物喷涂于试纸的结合垫,另一单抗和二抗(羊抗鼠IgG 抗体)分别包被在硝酸纤维素膜的检测线(T)和控制线(C)上,制备出检测阪崎肠杆菌胶体金试纸条,进行敏感性、特异性、稳定性、重复性试验,借助于简单的增菌过程,在6 h 内即可检测出样品中阪崎肠杆菌的含量,灵敏度达到1×104 CFU/mL,与常见的食源性致病菌无交叉反应。结果显示该试纸具有简单、灵敏、特异、稳定、快速等优点,可用于ES 的检测。

关键词: 阪崎肠杆菌, 单克隆抗体, 胶体金, 快速检测

Abstract: To develop and test its performance of colloidal gold immunochromatographic test strip for rapid detection of Enterobacter sakazakii(ES). The colloidal gold particles were prepared by the sodium citrate reduction method. Purified ES monoclonal antibodies were labelled with the colloidal gold particles. The gold-labeled antibody was coated on the gold conjugate pad using the immune double sandwich method. The another mAb of ES was coated on the surface of nitrocellulose filter membrane(NC)as the test line(T line), while the secondary antibody(goat anti-rabbit IgG antibody)was coated on the surface of NC as the control line(C line). Then the test strip was assembled with sample pad, absorbing pad, and dorsal shield. Its sensitivity, specificity, stablility and reproducibility were evaluated. It can detect the sample content of ES by means of a simple enrichment process. This whole time will take 6 h. The test strip’s sensitivity reached 1×104 CFU/mL, and displayed perfect specificity without cross reactions with food-borne pathogens. All these results showed that the strip was simple, sensitive, specific, stable, and rapid for detection of ES.

Key words: Enterobacter sakazakii, Monoclonal antibody, Colloidal gold, Rapid detection