Sequence-specific electrochemical detection of Alicyclobacillus acidoterrestrisDNA using electroconductive polymer-modified fluorine tin oxide electrodes

Literature Information

Publication Date 2008-10-29
DOI 10.1039/B809080G
Impact Factor 4.616
Authors

Katlin Ivon Barrios Eguiluz, Giancarlo Richard Salazar-Banda, Maribel Elizabeth Funes-Huacca, Juliana Vieira Alberice, Emanuel Carrilho, Sergio Antonio Spinola Machado, Luis Alberto Avaca


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Abstract

This study outlines the quantification of low levels of Alicyclobacillus acidoterrestris in pure cultures, since this bacterium is not inactivated by pasteurization and may remain in industrialized foods and beverages. Electroconductive polymer-modified fluorine tin oxide (FTO) electrodes and multiple nanoparticle labels were used for biosensing. The detection ofA. acidoterrestris in pure cultures was performed by reverse transcription polymerase chain reaction (RT-PCR) and the sensitivity was further increased by asymmetric nested RT-PCR using electrochemical detection for quantification of the amplicon. The quantification of nested RT-PCR products by Ag/Au-based electrochemical detection was able to detect 2 colony forming units per mL (CFU mL−1) of spores in pure culture and low detection and quantification limits (7.07 and 23.6 nM, respectively) were obtained for the target A. acidoterrestris on the electrochemical detection bioassay.

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