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Electrochemical sensors for fast detection of foodborne pathogens

Key words: 

pathogenic microorganisms, food examination, electrochemical sensors.

Summary

The hazard of microbiological contamination of food forces the development of fast and reliable alternative methods of microbial pathogens detection. Although traditional culturedbased methods are considered as the most reliable ones, they remain time-consuming and troublesome in fast and routine food control. Amongst the promising alternative analytical tools a significant role play electrochemical sensors capable of monitoring changes in electrical properties of the medium, which contains analyzed microbes (impedimetric, conductometric and potentiometric sensors), amperometric arrays usually used for the identification of microorganisms or its metabolites, and nucleic acid hybridization biosensors detecting nucleic acid fragments typical for foodborne pathogenic microorganisms. The work on DNA hybridization biosensors lead to construction of the sensor capable to recognize DNA fragments typical for gene coding an aerolysin, a toxin secreted by Aeromonas hydrophila bacteria, at the concentration of 2.5 µl/ml. Miniaturization and automation of electrochemical sensor enable in the future its wider application in fast foodborne pathogen detection.

dr inż. Mariusz TICHONIUK 

Poznań University of Economics and Business 

Faculty of Commodity Science  Department of Industrial Products Quality and Ecology

Aleja Niepodległości, 61-875 Poznań, Poland  e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. 

Additional information