1505. Predictive Value of Early Post-Transplant Bacteriuria on Rates of Recurrent Urinary Tract Infections in the First Year After Renal Transplantation

BACKGROUND: Urinary tract infection (UTI) is a common post-kidney transplant complication that has been associated with risk for allograft dysfunction. However, prior studies assessing risk factors for recurrent post-transplant UTI (rUTI) did not distinguish between asymptomatic bacteriuria and UTI. We hypothesize that early asymptomatic bacteriuria (EAB) and UTI after renal transplant are risk factors for rUTI. METHODS: A single-center retrospective cohort study of renal transplant recipients at a tertiary care, academic medical center from May 1, 2010 to January 31, 2015. Data on epidemiology, comorbidities, donor cultures, number of UTIs, days of foley catheter use, and antibiotic therapy were obtained from the electronic medical record and transplant patient database. Inclusion criteria: >18 years old post kidney transplant during the study period. Exclusion criteria: rUTI prior to transplant or anatomical abnormality of native kidney(s). Definitions: Early post-transplant (EPT): <28 days after transplant. Positive culture: growth of >10(5) cfu/mL. UTI-(fever, dysuria, +/− allograft or suprapubic pain) + positive culture. EAB-asymptomatic bacteriuria in the EPT period. rUTI: ≥ 3 UTIs in 1 year or 2 UTIs in 6 consecutive months within the year post-transplant. UTI episodes were considered separate if occurred >3 weeks after completion of prior antibiotics. Data were analyzed by Fischer’s exact test and chi-square test. RESULTS: A total of 369 patients were included; 40.4% had EAB and 6% had a UTI in the EPT (eUTI). rUTI occurred in 5.7% of patients (n = 21). In the rUTI group, 8 (38.1%) had EAB, 8 (38.1%) had eUTI, and 5 (23.8%) had neither (P = 0.067). rUTI developed in 5.3% (8/149) of the EAB group vs. 36.4% (8/22) of the eUTI group (P < 0.005). No other variables were associated with rUTI. Total UTI episodes was greater with eUTI than EAB (mean 2.09 vs. 0.28, 95% CI 2.2–1.4, P < 0.005). CONCLUSION: Only eUTI increased the risk for rUTI. Although screening for bacteriuria is a common practice post-transplant, our data indicates that aggressive symptom screening would better predict likelihood of rUTI and in turn graft dysfunction. Future studies should address the potential benefit of prolonged prophylactic trimethoprim/sufamethoxazole in preventing rUTI. DISCLOSURES: All authors: No reported disclosures.