Effects of Microamperage, Medium, and Bacterial Concentration on Iontophoretic Killing of Bacteria in Fluid
C P Davis, S Weinberg, M D Anderson, G M Rao and M M Warren
Department of Microbiology, University of Texas Medical Branch, Galveston
Antimicrobial Agents and Chemotherapy, April 1989, p. 442-447

An ionotophoretic generator was used to provide microamperage (10 to 400uA) to vials [by 2cm long thin metal electrodes] containg either synthetic urine or supplemented synthetic urine. Bacteria were added to vials [volume 10ml]. E coli and Proteus species were both inhibited and killed at various microamperages and with several electrode types. In general, ionotophoresis at 10, 50, 200, and 400uA killed the bacterial inocula within 2 days. Usually, the organisms were undetectable within 4 hours, except for K. pneumoniae, for which survivors were detected after 1 to 2 days.
This work suggests that even very low microamperage can be effective in reducing or eliminating bacterial growth. Klebsiella pneumoniae in supplemented synthetic urine was least inhibited in growth, and higher microamperage (200 to 400 microA) was most effective in killing the bacteria. Bacterial growth reduction and killing were directly related to increasing microamperage.

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Journal of Electrostatics
Volume 66, Issues 7-8, July 2008, Pages 355-360 

Inactivation of bacterial population in hide-soak liquors via direct electric current 

Inactivation of bacteria by electric currents has received much attention due to its high efficiency, low cost, and ease of application.
Mesophilic bacteria in the first (seven samples) and main (three samples) hide-soak liquors were inactivated after 20–30 min of electrical treatment. In the other four main hide-soak liquors, the inactivation occurred after 50 min of treatment. 

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Click here for a report on how immune cells can use an
electric shock to kill bacteria and fungus.