90. Impact of Infection Control Assessment and Response (ICAR) Visit on Candida auris Colonization Rates at Seven Long Term Acute Care Hospitals (LTACH) in Los Angeles County

Background Public health authorities often use Infection Control Assessment and Response (ICAR) visits during Candida auris (C. auris) outbreak investigation to identify facility-level infection prevention and control (IPC) practice gaps and make recommendations to address those gaps. As an adjunct to ICAR visit, point prevalence surveys (PPS) provide an objective measure to determine if IPC recommendations are implemented. Because they require significant public health resources to perform, we evaluated the impact of ICAR visits on C. auris colonization rates. Methods PPS were conducted at seven long-term acute-care hospitals (LTACH) with C. auris outbreaks in Los Angeles County from July 2020 to May 2021. Skin swabs collected at PPS were tested for C. auris colonization by PCR technique. Pre-ICAR PPS results were compared with the average of two serial post-ICAR PPS results using repeated measures ANOVA test. Linear regression was used to estimate associations between individual ICAR domains and C. auris colonization. Results 54 PPS were conducted at seven LTACHs with at least one ICAR visit made for every two PPS. On average, PPS were conducted 14 days (range 1-15 days) before and 10 days (range 4-33 days) after an ICAR visit. PPS positive rates with ICAR visit dates for each LTACH are shown in figure 1. Overall, ICAR visits were associated with a significant decrease (p=0.035) in the average of the positive rates in two serial post-ICAR PPS. When individual domain (hand hygiene, contact precautions, and environmental disinfection) of ICAR tool was analyzed, only adherence to environmental disinfection was significantly associated (p=0.038) with decrease in C. auris colonization rates. There was a moderate negative correlation (R2 = 0.26, β= -0.33) between environmental disinfection adherence and the magnitude of decrease in the colonization rates across all LTACHs (Figure 2). Figure 1 Figure 2 Conclusion ICAR visits were found to be significantly associated with a decrease in the average PPS positive rate on serial PPS. Parts of the ICAR tool that assessed environmental disinfection at the facility seemed most correlated with decrease in C. auris colonization rate. Streamlining the ICAR process to focus on the most impactful parts of ICAR tool may be a more efficient intervention to control C. auris outbreaks. Disclosures All Authors: No reported disclosures