314 - A Retrospective Review of Dalbavancin Utilization at an Academic Medical Center

Background: Dalbavancin is a novel long-acting lipoglycopeptide with increasing utilization for management of bone and joint infections as a two-dose regimen.  The purpose of this study is to describe the patient characteristics, evaluate clinical outcomes, and calculate inpatient hospital days saved with use of dalbavancin as outpatient parenteral antimicrobial therapy (OPAT).

Methods: A retrospective review of patients treated with dalbavancin at University Hospital was conducted from Aug 2019- March 2020. Patients ≥ 17 yrs of age with plan to receive at least 1 dose of dalbavancin were included.  All patients were initially evaluated by, and had clinic follow up with, an infectious disease physician. Information on baseline demographics, infection characteristics, treatments, and outcomes were recorded from the EMR.

Results: 42 patients met the study criteria. 62% were males with a median age of 49 yrs. 67% of patients had diabetes and 12% had a documented history of intravenous drug use. The most common indication was osteomyelitis (71%). S. aureus was the most commonly isolated organism in monomicrobial infections (MRSA 24%, MSSA 9.5%) and often a component of polymicrobial infections (33%). 90.5% of patients were adherent to their prescribed therapy; 1 patient missed both doses and 3 only received 1 of their recommended doses. Adverse effects were mild and noted in only 4 patients. 24 patients (57%) received concomitant antibiotics.  45% of patients achieved a cure with another 12% were classified as improved but requiring further antibiotics. 31% (N=13) had failure of therapy of which, 69% (N=9) did not achieve prior source control. 5 patients were lost to follow up. Our health system saved 160 inpatient days through dalbavancin use.

Conclusion: Dalbavancin treatment had a high adherence rate with minimal adverse effects and achieved a positive outcome in 57% of patients. Of patients that failed, the majority did not have appropriate source control. Dalbavancin use has the potential to save inpatient days while offering a more convenient option for treatment. However, further studies should be conducted to evaluate its efficacy in comparison to standard of care therapy at our institution.