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Background Kidney transplant recipients are at increased risk for infections. The aims of this study were: i) to estimate the incidence of bloodstream infections (BSI) caused by Gram(−) bacteria in kidney transplant recipients, ii) to identify risk factors for BSI by multidrug-resistant Gram(−) bacteria, and iii) to identify predictors for outcome (death/loss of transplanted kidney). Methods We conducted a retrospective cohort study at the renal transplant unit (RTU) of a tertiary care hospital located in Athens, Greece, between September 2008 and September 2018. Kidney transplant recipients with Gram(−) BSIs were identified from the microbiology laboratory electronic records. Patient-, infection-, and treatment-related factors were extracted from the medical records. Species identification and susceptibility testing were performed by MicroScan automated system. The statistical analysis was performed using IBM SPSS Statistics v20. Results During the study period, 1962 kidney transplant patients were followed at our RTU. A total of 195 BSI episodes were recorded in 182 patients (male/female=97/85), with median (25th, 75th) age 57.2 (44, 64.9) years. The incidence of BSI was 1.393/100 patient-years. Median (25th, 75th) time interval between transplantation date and onset of BSI was 67.67 (8.3, 148) months. Escherichia coli was the most common cause (64.3%, 117/182), while the most common source of infection was urinary tract (70.9%, 129/182). 19.2% (53/182) of BSIs were caused by multidrug-resistant organisms (MDR). 6% (11/182) of patients died and 2.2% (4/182) were subjected to nephrectomy. Multivariate logistic regression showed that diabetes mellitus (odds ratio [OR] 7.714; 95% confidence interval [CI] 1.311–45.385), Pseudomonas aeruginosa BSI (OR 35.788; CI 3.3–388.182) and septic shock (OR 74.468; CI 3.513–1578.513) were predictors of an unfavorable outcome. Previous antibiotic use (OR 11.964; CI 2.686–53.293) and previous stay in Intensive Care Unit (OR 18.055; CI 1.046–311.536) were associated with MDR BSIs. Conclusion BSIs in kidney transplant recipients is a critical factor of morbidity and mortality. Recognizing the risk factors for unfavorable outcome and emergence of MDR bacteria could offer a significant advantage in early diagnosis and appropriate treatment. Disclosures All authors: No reported disclosures.

open forum infectious diseases

222. Bloodstream Infections by Gram(−) Bacteria in Kidney Transplant Patients: Risk Factors, Incidence and Outcome; Bloodstream Infections by Gram(−) Bacteria in Kidney Transplant Patients: Risk Factors, Incidence and Outcome