# QCM-based immunosensor for rapid detection of Salmonella Typhimurium in food

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- Authors: Andrea Fulgione, Martina Cimafonte, Bartolomeo Della Ventura, Marco Iannaccone, Concetta Ambrosino, Federico Capuano, Yolande Thérèse Rose Proroga, Raffaele Velotta, Rosanna Capparelli
- Journal: Scientific reports
- Year: 2018
- Volume: 8
- Pages: 1–8
- DOI: 10.1038/s41598-018-34285-y
- Instrument used: openQCM 1, openQCM Sensors

## Abstract

Salmonella Typhimurium is one of the main causes of outbreaks and sporadic cases of human gastroenteritis. At present, the rapid detection of this pathogen is a major goal of biosensing technology applied to food safety. In fact, ISO standardized culture method takes up to ten days to provide a reliable response. In this paper, we describe a relatively simple protocol for detecting Salmonella Typhimurium in chicken meat based on a Quartz-Crystal Microbalance (QCM), which leads to a limit of detection (LOD) less than of 10° CFU/mL and requires a pre-enrichment step lasting only 2 h at 37 °C. The reliability of the proposed immunosensor has been demonstrated through the validation of the experimental results with ISO standardized culture method. The cost-effectiveness of the procedure and the rapidity of the QCM-based biosensor in providing the qualitative response make the analytical method described here suitable for applications in food inspection laboratory and throughout the chain production of food industry.

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