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Influence of Cell Type, Initial Concentration, and Medium on the Inactivation Efficiency of Low-Temperature Plasma

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3 Author(s)
Mounir Laroussi ; Old Dominion University, Norfolk, VA, USA ; Erdinc Karakas ; Wayne Hynes

It is now well known that low-temperature plasmas can inactivate bacteria effectively. At low doses, these plasmas can also help in the proliferation of healthy fibroblasts and detach damaged cells without causing necrosis. The combination of these characteristics leads to the possibility of using plasmas in biomedical applications such as wound healing. Although only limited understanding is available as to the mechanisms whereby plasmas interact with cells (prokaryotic or eukaryotic), it is now well established that the effects of plasmas on biological cells depend on the cell type, the cell concentration, and the medium supporting them. In this paper, we present clear visual evidence of these dependencies in the case of bacteria. Through simple imaging, we show that the size and shape of the inactivation zone depend on the type of bacteria, their initial concentrations, and the medium supporting the cells.

Published in:

IEEE Transactions on Plasma Science  (Volume:39 ,  Issue: 11 )