A novel electrochemical method for the identification of microorganisms

A novel electrochemical method for the recognition of different species of microorganisms has been developed. It consists of sampled DC voltammetry ap plied directly to microbial cultures or to the supernatants of these Cultur es obtained following centrifugation. Pt, An, and glassy carbon working ele ctrode materials were examined. Complete and replicated voltammograms obtai ned at gold working electrodes were processed by factor analysis to generat e the scores plots that were used for pattern recognition of the different species. Three Gramnegative bacteria (E. aerogenes, P. vulgaris and E. coli ), two Gram-positive bacteria (B. cereus and S. aureus) and one fungus (S. cerevisiae) were tested. The chemometric methods employed for data analysis produced clear groupings of replicate voltammograms for these organisms. a llowing species identification.