Decontamination of Targeted Pathogens from Patient Rooms Using an Automated Ultraviolet-C-Emitting Device

Abstract

Objective.To determine the effectiveness of an automated ultraviolet-C (UV-C) emitter against vancomycin-resistant enterococci (VRE),Clostridium difficile, andAcinetobacterspp. in patient rooms.Design.Prospective cohort study.Setting.Two tertiary care hospitals.Participants.Convenience sample of 39 patient rooms from which a patient infected or colonized with 1 of the 3 targeted pathogens had been discharged.Intervention.Environmental sites were cultured before and after use of an automated UV-C-emitting device in targeted rooms but before standard terminal room disinfection by environmental services.Results.In total, 142 samples were obtained from 27 rooms of patients who were colonized or infected with VRE, 77 samples were obtained from 10 rooms of patients withC. difficileinfection, and 10 samples were obtained from 2 rooms of patients with infections due toAcinetobacter. Use of an automated UV-C-emitting device led to a significant decrease in the total number of colony-forming units (CFUs) of any type of organism (1.07 log10reduction;P< .0001), CFUs of target pathogens (1.35 log10reduction;P< .0001), VRE CFUs (1.68 log10reduction;P< .0001), and C.difficileCFUs (1.16 log10reduction;P< .0001). CFUs ofAcinetobacteralso decreased (1.71 log10reduction), but the trend was not statistically significantP= .25). CFUs were reduced at all 9 of the environmental sites tested. Reductions similarly occurred in direct and indirect line of sight.Conclusions.Our data confirm that automated UV-C-emitting devices can decrease the bioburden of important pathogens in real-world settings such as hospital rooms.