相关实验视频

Updated: Aug 19, 2026

Detection of Live Escherichia coli O157:H7 Cells by PMA-qPCR

Detection of Live Escherichia coli O157:H7 Cells by PMA-qPCR

Published on: February 1, 2014

一个基于菌体DNA探针的通用双模式水凝阵列,用于通过光/微流体芯片电泳法同时快速查和精确的定量检测食品中的大肠杆菌O157:H7

Jie Xu¹, Jiale Yu¹, Weiyue Liu²

¹Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China.

Analytica chimica acta

|January 5, 2024

概括

一种新的双模式水凝生物传感器能够快速查和精确检测像大肠杆菌O157:H7.7这样的毒性细菌. 这种菌体-DNA探针系统通过同时光和电泳检测方法来提高食品安全.

科学领域:

生物技术是生物技术.
食品安全食品安全
生物感应是一种生物感应.

背景情况:

对毒性细菌菌株的快速和具体检测对于食品安全至关重要.
目前的方法面临着大量样本和特异性的挑战.
病毒性细菌感染对公众健康构成重大风险.

研究的目的:

开发一种双模式的水凝阵列生物传感器,用于同时快速查和精确的毒性细菌定量检测.
利用一种新的DNA修饰的菌体探针来增强细菌检测.
为了提高细菌检测试验的准确性和减少虚假阳性.

主要方法:

使用酸盐和离子构建双模式水凝阵列生物传感器.
纳入DNA修饰的菌体,触发用于探头生成的滚动圆放大 (RCA).
双检测模式:光 (FL) 通过SYBR绿色染色和微流体芯片电泳 (MCE) 的未反应的互补DNA (cDNA).

主要成果:

达到FL的50 CFU mL-1和E. coli O157:H7.7的MCE的6 CFU mL-1的检测极限.
证明了FL和MCE信号之间的相互校正,以减少假阳性.
成功应用了检测沙门氏菌Typhimurium的试验,表明其具有普遍适用性.

结论:

开发的双模式水凝生物传感器为同时快速查和精确定量检测毒性细菌菌株提供了通用平台.
这种生物传感器为加强食品安全和公共卫生监测提供了一个有希望的解决方案.
光和电泳的结合为细菌检测提供了一种强大而准确的方法.

关键词:

光法是一种光方法.通过食物传播的病原体凝阵列是一个凝阵列.微流体芯片电泳学菌体探针探测器菌体探针滚动圈放大器滚动圈放大器

更多相关视频

Foodborne Pathogen Screening Using Magneto-fluorescent Nanosensor: Rapid Detection of E. Coli O157:H7

Foodborne Pathogen Screening Using Magneto-fluorescent Nanosensor: Rapid Detection of E. Coli O157:H7

Published on: September 17, 2017

Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen

Development of an Electrochemical DNA Biosensor to Detect a Foodborne Pathogen

Published on: June 3, 2018

相关概念视频

Rapid Identification of Pathogens

Rapid Identification of Pathogens

MALDI-TOF MS has transformed clinical microbiology by offering a rapid and reliable method for pathogen identification. The traditional approach to microbial identification typically involves time-consuming culture techniques and biochemical tests, which can delay the initiation of appropriate antimicrobial therapy. MALDI-TOF MS avoids these delays by using characteristic ribosomal protein mass patterns of microbial cells, enabling accurate species-level identification within minutes.Principle...

Automated Microbial Diagnostics

Automated Microbial Diagnostics

Automated diagnostic analyzers have transformed clinical microbiology by providing rapid and reliable methods for pathogen identification and antibiotic susceptibility testing. Among these systems, the Vitek 2 is widely used because it automates the traditionally labor-intensive processes of microbial identification (ID) and antibiotic susceptibility testing (AST), delivering standardized and timely results that are essential for effective patient care.Microbial Identification with ID CardsThe...