Simple Colorimetric Assay for Detection Using Aptamer-Functionalized Nanoparticles.

Simple, rapid, and sensitive screening methods are the key to prevent and control the spread of foodborne diseases. In this study, a simple visual colorimetric assay using magnetic nanoparticles (MNPs) and gold nanoparticles (AuNPs) was developed for the detection of . First, the aptamer responding to was conjugated onto the surface of MNPs and used as a specific magnetic separator.