Figure 2. Inactivation of different bacterial strains P. aeruginosa and S. aureus by the application of separate air and helium plasma or ozone.

The inactivation (number of colony forming units) of (a) P. aeruginosa and (b) S. aureus after treatment for indicated periods of time with air plasma or ozone. The inactivation (number of colony forming units) of (c) P. aeruginosa (d) S. aureus after treatment for indicated periods of time with helium plasma. Data are presented as mean ± SD, n = 4.