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Molecules 2013, 18(4), 4018-4025; doi:10.3390/molecules18044018

Effect of a Combination of Low Level Ozone and Metal Ions on Reducing Escherichia coli O157:H7 and Listeria monocytogenes

Department of Animal Resources Technology, Gyeongnam National University of Science and Technology, Gyeongnam 660-758, Korea
Department of Cancer and Cell Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
Department of Food Science and Technology, Institute of Food Science, Pukyong National University, Busan 608-737, Korea
Department of Food Science and Biotechnology, Kangwon National University, Chuncheon 200-701, Korea
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 16 February 2013 / Revised: 1 April 2013 / Accepted: 1 April 2013 / Published: 4 April 2013
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Ozonated water has been used as a strong antimicrobial agent against foodborne pathogens. In this study, the combined effect of low level ozonated water and different added components, including 0.2% starch and metal ions (1 mM CuCl2·2H2O and 0.1 mM AgNO3), on inactivation of Escherichia coli O157:H7 and Listeria monocytogenes was investigated. Treatment with 0.4 ppm ozonated water for 30 min resulted in a maximum log reduction in E. coli O157:H7 and L. monocytogenes compared to initial bacterial counts. The log reductions of bacteria in a starch solution containing ozonated water were slightly higher than those in ozonated water alone. Furthermore, the log reductions of E. coli O157:H7 (2.59 and 4.71 log cfu/mL) and L. monocytogenes (2.53 and 4.28 log cfu/mL) in a metal ion solution containing 0.2 and 0.4 ppm ozone for 30 min were significantly higher than those of the water and starch added groups (p < 0.05). These results indicate that a combination of ozonated water and metal ions may be useful as a antimicrobial agent. View Full-Text
Keywords: ozonated water; metal ion; combination; E. coli; L. monocytogenes ozonated water; metal ion; combination; E. coli; L. monocytogenes
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Kang, S.-N.; Kim, K.-J.; Park, J.-H.; Lee, O.-H. Effect of a Combination of Low Level Ozone and Metal Ions on Reducing Escherichia coli O157:H7 and Listeria monocytogenes. Molecules 2013, 18, 4018-4025.

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