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Applied and Environmental Microbiology, April 2003, p. 2405-2408, Vol. 69, No. 4
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.4.2405-2408.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Inactivation of Bacteria in Seawater by Low-Amperage Electric Current

Jong-Chul Park,1* Min Sub Lee,1 Dong Hee Lee,1 Bong Joo Park,1 Dong-Wook Han,1 Masakazu Uzawa,2 and Kosuke Takatori3

Department of Medical Engineering, Yonsei University College of Medicine, Seodaemun-ku, Seoul 120-752, Korea,1 Applied Science Co. Ltd., Ichikawa-si, Chiba 272-0822,2 Division of Microbiology, National Institute of Health Sciences, Setagaya, Tokyo 158-8501, Japan3

Received 12 August 2002/ Accepted 13 January 2003

Seawater used in mariculture has been suspected of being a potential source of infection. In this study, the lethal effects of low-amperage electric treatment on microorganisms were examined in natural seawater and in seawater inoculated with Vibrio parahaemolyticus. In both cases, bacteria including V. parahaemolyticus in seawater were completely eliminated in 100 ms by a 0.5-A, 12-V direct current. Electron microscopic investigation of the electrically treated bacteria revealed substantial structural damage at the cellular level. In conclusion, our results indicate that low-amperage electric treatment is effective for rapid inactivation of microorganisms in seawater.

* Corresponding author. Mailing address: Department of Medical Engineering, Yonsei University College of Medicine, 134 Shinchon-dong, Seodaemun-ku, Seoul 120-752, Korea. Phone: 82-2-361-5407. Fax: 82-2-363-9923. E-mail: parkjc{at}yumc.yonsei.ac.kr.

Applied and Environmental Microbiology, April 2003, p. 2405-2408, Vol. 69, No. 4
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.4.2405-2408.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Park, J.-C., Lee, M. S., Han, D.-W., Lee, D. H., Park, B. J., Lee, I.-S., Uzawa, M., Aihara, M., Takatori, K. (2004). Inactivation of Vibrio parahaemolyticus in Effluent Seawater by Alternating-Current Treatment. Appl. Environ. Microbiol. 70: 1833-1835 [Abstract] [Full Text]  


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