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Updated: Dec 10, 2025
Development of a More Sensitive and Specific Chromogenic Agar Medium for the Detection of Vibrio parahaemolyticus and Other Vibrio Species
Published on: November 8, 2016
Faraday cage-type aptasensor for dual-mode detection of Vibrio parahaemolyticus
Wenting Wei1, Han Lin1, Huili Shao1
1State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, State Key Laboratory Base of Novel Functional Materials and Preparation Science, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, People's Republic of China.
Abstract:
A Faraday cage-type aptasensor has been developed for dual-mode detection of a common bacterial pathogen Vibrio parahaemolyticus (VP) by electrochemiluminescence (ECL) and differential pulse voltammetry (DPV), using a multi-functionalized material Pb2+-Ru-MOF@Apt2 as signal unit. The recognition aptamer Apt2 recognizes VP; specifically, ruthenium-based metal organic framework (Ru-MOF) and lead ions (Pb2+) embedded produce an ECL signal at a working potential from 0 to 1.5 V and DPV signal from - 0.3 to - 0.8 V vs. Ag/AgCl. Since Ru-MOF is a two-dimensional conductive material signal unit overlapped onto the electrode surface to form a Faraday cage-type aptasensor. Thus, electrons could be easily exchanged between electrode and signal tags without being hindered by micron-size VP, resulting in a high detection sensitivity with a detection limit of 1.7 CFU mL-1. In addition, dual-mode detection was achieved, improving the accuracy and reliability of rapid field detection. Stability and selectivity were also satisfactory. The tests of real samples indicate that this Faraday cage-type aptasensor is suited for rapid detection of VP and analog pathogens and shows great potential in food safety. Graphical abstract.
