Portable UV room sterilizing units are being used to reduce endospores of Clostridum difficile in patient hospital rooms after patients have vacated the room. Which of the statements best describes this application?

A. UV radiation will destroy C. difficile endospores and penetrates well to all locations within the room.
B. UV radiation will not destroy C. difficile endospores.
C. UV radiation will destroy C. difficile endospores and has residual sporicidal effects that will persist after the unit has been removed from the patient's room.
D. UV radiation will destroy C. difficile endospores assuming it is applied for a long enough period and directly contacts all surfaces.


Answer: D

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