Selective sterilization of Vibro parahaemolyticus from a bacterial mixture by low-amperage electric current

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Authors: Jin, Soo Chang ; Hyunsuk Yoo ; Yeon I. Woo ; Mi Hee Lee ; Barbora Vagaska ; Jung-Sung Kim ; Masakazu Uzawa ; Jong-Chul Park

Citation: JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY, Vol.19(6) : 537-541, 2009

MeSH: Colony Count, Microbial ; Electricity* ; Escherichia coli/physiology ; Escherichia coli/ultrastructure ; Food Industry ; Microscopy, Electron, Scanning ; Staphylococcus aureus/physiology ; Staphylococcus aureus/ultrastructure ; Sterilization/methods* ; Time Factors ; Vibrio parahaemolyticus/physiology* ; Vibrio parahaemolyticus/ultrastructure

Keywords: Escherichia coli ; low-amperage electrical ; Staphylococcus aureus ; selective sterilization ; Vibrio parahaemolyticus

Abstract: The objective of this study was to investigate the possibility of using low-amperage electrical treatment (LAET) as a selective bacteriocide. Mixtures containing Escherichia coli, Staphylococcus aureus, and Vibrio parahaemolyticus were treated with different electric current intensities and for different times. The results showed that at 263 mA, treating bacteria for 100 ms eliminated all V. parahaemolyticus colonies. Although LAET reduced the populations of the three microorganisms, V. parahaemolyticus was more injured by LAET than S. aureus and E. coli when treated at the same processing conditions.