Infection Control & Hospital Epidemiology
patients with CDI. Previous studies have demonstrated that exposure times of 10 minutes or longer may provide sufficient UV-C dosing to reduce C. difficile spores by 2 logs or more.18,20–21 Our study has some limitations. We assessed contamination of
the radiology department with a single point-prevalence culture survey. For the evaluation of reduction on carriers, we evaluated only 3 pathogens and conducted testing in only 1 type of pro- cedure room. Results may differ in other types of rooms or in other outpatient settings. We did not evaluate the efficacy of the devices in reducing real-world contamination on radiology tables. However, we included an organic load to simulate organic material that might be present on surfaces and placed the carriers at multiple sites on the table. Finally, we focused on decontami- nation of the procedure table based on the presumption that this would be the area most likely to become contaminated and contribute to patient-to-patient transmission. However, we can- not exclude the possibility that other sites in the procedure room might also become contaminated and contribute to transmission.
Acknowledgments. We would like to thank the staff of the Radiology Department at the Cleveland VA Medical Center for assistance with testing and the companies that provided temporary use of ultraviolet light devices for the study.
Financial support. Department of Veterans Affairs (Merit Review grant to C.J.D.)
Conflicts of interest. C.J.D. has received research funding from GOJO, Pfizer, Clorox, Avery Dennison, and Boehringer Laboratories. All other authors report no conflicts of interest relevant to this article.
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