Fig. 3. Efficacy of 5 standard vertical tower ultraviolet light decontamination devices in reducing (A) methicillin-resistant Staphylococcus aureus (MRSA), (B) vancomycin- resistant Enterococcus, and (C) Clostridium difficile spores on 20-mm2 steel disk carriers placed on a radiology procedure table. NOTE. LPM, low-pressure mercury. The devices were operated for a 4-minute cycle and reductions in pathogens were measured in comparison to untreated controls. The means of data from triplicate experiments are presented. Error bars indicate standard deviation.
Fig. 4. Efficacy of 3 nonstandard ultraviolet light decontamination devices in reducing (A) methicillin-resistant Staphylococcus aureus (MRSA), (B) vancomycin-resistant Enterococcus, and (C) Clostridium difficile spores on 20-mm2 steel disk carriers placed on a radiology procedure table. The nonstandard devices included a device with 3 adjustable lamps that can be oriented to provide closer proximity to the surface of interest, a robotic device that moves along the side of the table during the treatment cycle, and a device that has 3 vertical towers that run simultaneously to reduce the impact of shadowing. The devices were operated for a 4-minute cycle and reductions in pathogens were measured in comparison to untreated controls. The means of data from triplicate experiments are presented. Error bars indicate standard deviation.
