Photoinactivation of Propionibacterium acnes by near-ultraviolet light.
Photodestruction of Propionibacterium acnes was investigated by broad-band near-ultraviolet light. The inactivation of the bacteria was found to be oxygen dependent, and without O2 practically no photoinactivation occurred. D2O caused an increased inactivation (D10 = 5 kJ/m2 in D2O as compared to D10 = 11 kJ/m2 in normal water). Decreased temperature during illumination increased the ability to form colonies. The results are compared with corresponding results for other types of cells and the destruction mechanism is discussed.
D004307:Dose-Response Relationship, Radiation; D011425:Propionibacterium acnes / Q000254:growth & development / Q000528:radiation effects*; D014466:Ultraviolet Rays