Sterilization of Escherichia coli and MRSA using microwave-induced argon plasma at atmospheric pressure

The effect of a plasma needle on bacteria in planktonic samples and on peripheral blood mesenchymal stem cells

“…If mechanical erosion of the bacterial membrane is one of the factors responsible for its inactivation, we can assume that E. coli will suffer less damage in the same treatment conditions, as compared to S. aureus. Park et al [45,46] showed that damage induced by plasma in the case of E. coli consisted of punctured, eroded and morphologically transformed bacteria, while for S. aureus, the bacteria were ruptured with their cellular contents released onto the substrate surface. This, according to the authors, demonstrates that a strong etching process is responsible for the observed microorganism inactivation [45,46].…”

Inactivation of Bacterial Spore, Endotoxin, Lipid A, Normal Prion and Abnormal Prion by Exposures to Several Sorts of Gases Plasma

“…Nevertheless, the role of UV Trompeter et al, 2002Park et al, 2003Heise et al, 2004Lee et al, 2005 against spores was shown to be similar to what was observed for low-pressure plasmas. In addition, two further mechanisms that have not been observed with low-pressure plasma discharges are active in this case.…”

Inactivation of Bacteria by Non-Thermal Plasmas

“…Therefore, UV photons are not likely to take part in the inactivation of micro-organisms when air plasmas are used. In contrast to the previous literature overview, some authors (Park et al, 2003, Heise et al, 2004, Lee et al, 2005, Trompeter et al, 2002 do mention the possible role of UV photons in plasma sterilization at atmospheric pressure, however, the arguments brought forward are quite often not fully convincing or incomplete (Boudam et al, 2006). For example, Trompeter et al (Trompeter et al, 2002) employed an atmospheric pressure filamentary DBD in different gases and found that argon was the most efficient gas in terms of spore inactivation.…”

“…They can be employed to treat small-sized objects, but can also be used for large-scale treatments by moving the jet over the selected area or by applying multiple nozzles next to each other. The following section will focus on the most important atmospheric pressure plasma jets employed for bacterial inactivation, however, it is important to mention that also other types of plasma jets have been developed for disinfection purposes (Shimizu et al, 2010, Chiang et al, 2010, Ikawa et al, 2010, Lee et al, 2005, Liu et al, 2010, Kim et al, 2009, Huang et al, 2007. One type of plasma jet, which is actively employed for bacterial sterilization is the so-called "atmospheric pressure plasma jet (APPJ)".…”