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Subtyping of Campylobacter jejuni ssp. doylei Isolates Using Mass Spectrometry-based PhyloProteomics MSPP
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Innovative Sensor Approach to Follow Campylobacter jejuni Development
Estefanía Núñez-Carmona1, Marco Abbatangelo2, Veronica Sberveglieri3,4
1Department of Information Engineering, University of Brescia, Brescia, via Branze, 38, 25123 Brescia, BS, Italy. e.nunezcarmona@unibs.it.
Biosensors
|January 10, 2019
Summary
This study identifies unique volatile organic compounds (VOCs) from Campylobacter jejuni infections. Metal oxide (MOX) gas sensors show promise for rapid detection of this common foodborne illness.
Area of Science:
- Microbiology
- Food Safety
- Sensor Technology
Background:
- Campylobacter spp. infections are increasing in Europe, with over 200,000 cases annually.
- Contaminated food, including meat, milk, and produce, is the primary transmission route for Campylobacter.
- Campylobacteriosis poses a significant public health concern due to its prevalence and transmission pathways.
Purpose of the Study:
- To identify characteristic volatile organic compounds (VOCs) produced by Campylobacter jejuni.
- To develop a detection method for C. jejuni using an array of metal oxide (MOX) gas sensors.
- To assess the potential of MOX gas sensors for rapid and sensitive detection of C. jejuni.
Main Methods:
- Analysis of VOCs from C. jejuni cultures using Gas-Chromatography Mass-Spectrometry (GC-MS) and Solid-Phase Micro Extraction (SPME).
- Monitoring bacterial growth and VOC production over 20 hours (T0 to T20).
- Utilizing an array of MOX gas sensors and Principal Component Analysis (PCA) to interpret sensor data.
Main Results:
- Increased alcohol compounds were observed in C. jejuni samples at T20 compared to T0, attributed to sugar fermentation.
- MOX gas sensor array successfully monitored bacterial growth patterns from T0 to T20.
- A decrease in the ΔR/R₀ value over time indicated sensor response correlated with bacterial growth.
Conclusions:
- MOX gas sensors demonstrate potential for detecting C. jejuni by analyzing VOC profiles.
- The developed sensor system shows promise for rapid and sensitive detection of C. jejuni in food safety applications.
- Further development of MOX sensor technology could lead to effective tools for controlling foodborne campylobacteriosis.
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