Fig. 4

Fluorescence microscope image with the emission filter 470/40: green/living bacteria showing a, c, e and g for positivecontrol, PDT, plasma and phosphoric acid subgroups, respectively, and emission filter 546/12 showing red/dead bacteria in b, d, f and h for positive control, PDT, plasma and phosphoric acid subgroups, respectively. All groups were demonstrated in a 100-fold magnification