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Bacterial photoinactivation with Tri-Py+-Me-CO2H. Survival curves of E. faecalis (A) and E. coli (B) (~107 CFU mL-1) incubated with porphyrin Tri-Py+-Me-CO2H and exposed to PAR light for different light doses. Light control (cross), dark control (filled diamond), 0.5 μM (filled circle), 1.0 μM (filled square), 5.0 μM (filled triangle). Values represent the mean of two independent experiments; error bars indicate the standard deviation.
