Pulsed electric fields reduce bacterial attachment to stainless steel plates


pulsed electric field ; bacterial attachment ; prosthetic joint infection ; biofilm ; adhesion.

Published online: Mar 30 2018

Ernesto Muñoz-Mahamud , Araceli González-Cuevas , Josep M. Sierra , Vicenç Diaz -Brito, Adrián B ermúdes , Alex Soriano , Juan Castellanos , Lluis Font -Vizcarra

From the research laboratory of the Parc Sanitari Sant Joan de Déu, Sant Boi de Llobregat, Barcelona, Spain


The purpose of this study was to evaluate the capacity of pulsed bilateral electric fields to control bacterial attachment on stainless steel plates. Previously sterilized circular metal plates of  stainless steel were submerged in a liquid medium with a known concentration of Staphylococcus epidermidis and incubated for 1 hour at 36oC while a 200 Hz pulsed electric field of 18 V/cm was  applied for 2.5 μseg and then sonicated for 5 minutes in 10 ml of saline. Three different models were cultured and compared: 1) negatively-charged plate, 2) positively-charged plate, and 3) control plate without electric current. A total of 39 metal plates were processed. The median adherence in the control group and the electric field group was 312 CFU/mm2 and 16,2 CFU/mm2 respectively (p < 0.001, reduction of 95% of bacterial attachment). Bilateral pulsed electric field is able to reduce bacterial attachment on stainless steel plates in in vitro conditions.