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Photodynamic inactivation of S. aureus (A), P. aeruginosa (B), and E. coli (C) in their stationary phase. After 30 min in the different solutions of 5Lys (10 μM for S. aureus and E. coli, 1 μM for P. aeruginosa in PBS 1×), bacteria were washed three times with PBS. Then, they were irradiated by white LED (4.83 mW/cm2, 7 J/cm2 corresponds to 24 min) at 37 °C. Bacterial survival rates (% of initial densities) were plotted against cumulative light fluence at different irradiation times.
