Evaluating the Impact of Ultraviolet Light Disinfection on Clostridioides difficile Infections: A Study of Prevalence, Control Strategies, and Public Health Significance

Background Clostridioides difficile (C. difficile) is a leading healthcare-associated infection (HAI), causing severe diarrhea and colitis, particularly in hospitalized patients. Controlling C. difficile is critical to improving patient outcomes and reducing healthcare costs. Despite the availability of ultraviolet (UV) light disinfection as a supplemental cleaning method, improper or inconsistent use of this technology may perpetuate reinfections. This study examines the impact of UV disinfection on C. difficile infections, barriers to protocol adherence, and strategies to enhance compliance and public health outcomes. Methods This observational study conducted over a year (September 1, 2023 – August 31, 2024) at an academic medical center, analyzed compliance with UV disinfection protocols in discharged rooms occupied by C. difficile patients. Live observations of Infection Prevention (IP) and Environmental Services (EVS) teams assessed compliance with hand hygiene (HH), personal protective equipment (PPE) use, and room signage, while artifact reviews cross-referenced UV light machine reports with patient discharge data. The primary outcome was compliance with the disinfection protocols, defined as correctly using a UV disinfection device after discharge. Predictor variables included room type (Intensive Care Unit [ICU] vs. general floor), HH practices, and sporicidal cleaning agent usage. Confounding variables included staff training and equipment availability. Chi-square analysis to assess differences in compliance across room types. Results Among the 75 patient discharges, overall compliance with UV light protocols was 10.7%, with 0% in ICU rooms and 10.5%-11.5% on general floors. Observational data revealed systemic barriers, such as limited machine availability, high patient turnover, and communication gaps between staff. A chi-square test (p=0.770) indicated no significant differences by room type. Conclusion This study reveals significant non-compliance with UV disinfection protocols, driven by systemic operational inefficiencies. Targeted interventions such as enhanced training, better communication, and robust monitoring systems can mitigate C. difficile transmission risks, and optimizing measures is critical in high-risk areas (ICU), where compliance was notably absent. These findings carry significant public health implications, as strengthening infection control practices is vital for reducing C. difficile transmission and improving patient outcomes in healthcare settings.