81. Impact of Early Post-Transplant Multidrug-Resistant Organism Detection Among Renal Transplant Recipients, 2005–2021

Abstract Background Understanding the impact of multi-drug resistant organism (MDRO) acquisition on renal transplant recipients (RTR) mortality and allograft function is paramount to mitigating deleterious outcomes. Prior studies have been limited by lack of control groups and sample sizes. We aimed to the assess whether the detection of an MDRO or a susceptible organism during the early post-transplant period was associated with increased mortality and allograft failure among RTRs. Methods We performed a retrospective cohort study of RTRs at the Emory University Transplant Center between 2005–2022. Early post-transplant culture positivity was defined as a positive culture within 30 days of renal transplant. The primary outcome was a combined composite of one year- allograft loss and/or mortality following renal transplant. A Kaplan–Meier survival analysis was performed, and differences between survival curves for RTRs with an early post-transplant positive culture (stratified by susceptibility status) and negative control RTRs were assessed using the log-rank test. Multivariable cox proportional hazard and a competing risk analysis were performed. Results Among 3,233 RTRs, 259 (8%) had a susceptible organism detected and 35 (1%) had an MDRO detected (Figure 1). Demographic and microbiology characteristics are summarized in Table 1 & 2. One hundred and forty-nine (5%) RTRs experienced the composite outcome, this was experienced more frequently among RTRs with an MDRO detected (14%, 5/35) compared to RTRs with a susceptible organism defected (8%, 21/259) and negative controls (4%, 123/2,939) (Table 3). Significant difference between time from transplantation to the composite outcome when comparing negative controls, MDRO and susceptible organisms RTRs was observed (log rank p < 0.001) (Figure 2). Early post-transplant culture positivity (aHR 1.98 [1.30, 3.04]) and MDRO detection (aHR: 3.20 [1.30, 7.84]) were significantly associated with the composite outcome (Table 4). Conclusion MDRO as well as susceptible organism acquisition during the early post-transplant period was associated with increased mortality and allograft loss highlighting the need for increased infection prevention efforts within this vulnerable population. Disclosures All Authors: No reported disclosures.