1017. Impact of Enterococcal Bloodstream Infection on Mortality in Patients With Acute Myelogenous Leukemia

BACKGROUND: Though enterococcal bloodstream infection (EBSI) is common in patients with acute myelogenous leukemia (AML), its impact on mortality requires further elucidation. Our objectives were to: (1) determine attributable mortality to EBSI and (2) compare overall, 1-year, relapse-related mortality (RRM), and treatment-related mortality (TRM) between AML patients with and without EBSI. METHODS: This was a retrospective cohort receiving intensive chemotherapy for AML from 2010 to 2015. EBSI was defined by _1 positive blood culture for E. faecium or faecalis and fever, hypotension, or chills. Attributable mortality to EBSI was defined by failure to achieve BSI Clearance (_1 negative culture _24 hr after last positive culture and defervescence) by the date of death. Student’s t-test was used to compare continuous variables, and C(2) test was used for categorical variables. Kaplan–Meier was used for survival analyses (unadjusted), and P-values were computed by log-rank. RESULTS: Three hundred eight patients were identified during the study period: 80 with EBSI and 228 without EBSI. 5/80 patients died with EBSI (6%) although 4/5 patients had concurrent infections at the time of death (Clostridium difficile colitis, candidemia, proven invasive aspergillosis, and probable invasive fungal disease, respectively). There were no significant differences between overall and 1-year mortality (Table 1). In the survival analyses, EBSI did not significantly impact overall survival, 1-year mortality, RRM, and TRM (Figure 1). However, patients with vancomycin-resistant EBSI (VRE) trended toward increased overall mortality. CONCLUSION: Attributable mortality to EBSI is uncommon (6%) in AML. Additionally, EBSI does not significantly impact mortality in this vulnerable patient population that already has very high rates of RRM and TRM. However, as EBSI inflicted 26% of patients over the course of this study period, further investigation is needed to elucidate the morbidity suffered from this common infection and identify potentially modifiable risk factors. Table 1. [Image: see text] DISCLOSURES: A. Sung, Merck: Grant Investigator, Grant recipient. Enterome: Grant Investigator, Grant recipient.