438. Dalbavancin Clinical Experience at an NCI Designated Cancer Center

Abstract Background Dalbavancin (DAL) is a long-acting lipoglycopeptide, which allows for up to 2 weeks of therapy from a single dose. Outside of its FDA-approved indication for the treatment of acute bacterial skin and skin structure infections (ABSSSI), there is a growing interest in the utilization of DAL for other indications, including catheter-related bloodstream infection (CRBSI). The long-acting formulation potentially facilitates patient discharge or admission deferral without the need for daily outpatient parenteral antimicrobial therapy (OPAT). However, there is limited experience reporting DAL utilization in an oncology population. The objective of this study was to report our experience with DAL in an oncology patient population at a National Cancer Institute (NCI) Designated Cancer Center. Methods We conducted a retrospective review of all patients receiving DAL therapy in June 2016–June 2017. The primary outcome was a clinical success at 30 days (complete/partial resolution of symptoms without readmission for a same/similar infection), with secondary outcomes including readmission rate, acute kidney injury (AKI) incidence (Acute Kidney Injury Network [AKIN] criteria) and additional antimicrobial use within 30 days. Results We identified 76 unique subjects, with 77 unique infectious episodes, receiving 78 DAL doses. The majority of the subjects were male (57%), the median age was 61 years old, 55% had a solid tumor type and most were treated for ABSSSI (86%). Doses were administered inpatient 76% of the time and most patients received 1500 mg (90%). The most common pathogen isolated was Staphylococcus aureus (19%). Patients frequently received additional methicillin-resistant Staphylococcus aureus active oral antibiotics (39%). Clinical success was reported in 78% of infections. Potential DAL-related AKI was identified in 4 subjects (5%). Conclusion We reported on the use of DAL in a variety of oncology patients at a major cancer center. Clinical success was often achieved in ABSSSI with a single DAL dose and nephrotoxicity was infrequently encountered. Limitations include the frequent use of additional, potentially active antimicrobials and difficulty in assessment of clinical success and AKI in patients after discharge. Disclosures All authors: No reported disclosures.