A Multicenter Retrospective Study Evaluating Intravenous to Oral Antibiotic Stepdown for Uncomplicated Streptococcal Bacteremia

Author:

Lew Alison K1ORCID,Salam Madison E2,Gross Alan E3ORCID,Wang Sheila K4,McGuire Erin4,Pettit Natasha N1ORCID,Pisano Jennifer5,Nguyen Cynthia T1ORCID

Affiliation:

1. Department of Pharmacy, University of Chicago Medicine , Chicago, Illinois , USA

2. Department of Pharmacy, University of Colorado Hospital , Aurora, Colorado , USA

3. Department of Pharmacy Practice, University of Illinois Chicago College of Pharmacy , Chicago, Illinois , USA

4. Department of Pharmacy, Northwestern Memorial Hospital , Chicago, Illinois , USA

5. Department of Medicine, University of Chicago Medicine , Chicago, Illinois , USA

Abstract

Abstract Background The purpose of this study was to compare the efficacy and safety of intravenous (IV) versus oral (PO) stepdown therapy for uncomplicated streptococcal bacteremia. Methods This multicenter, retrospective study included adult patients with uncomplicated streptococcal bacteremia between 1 July 2019 and 1 July 2022. Patients who received IV therapy for the full treatment course were compared to patients who transitioned to PO therapy after initial IV therapy. The primary outcome was clinical success, defined as absence of infection recurrence, infection-related readmission, and infection-related mortality at 90 days. Secondary outcomes included microbiological success, length of stay (LOS), and IV line–associated complications. Results Of 238 patients included, 47.1% received PO stepdown therapy. Clinical success occurred in 94.4% and 94.6% in the IV only and PO stepdown groups, respectively (P = .946). Patients who transitioned to PO therapy received a median duration of IV therapy of 3.9 days (interquartile range, 2.9–7.3 days). Line complications were more frequent in the IV only group, primarily driven by catheter-related infections (7.2% vs 0%, P = .002). LOS was significantly shorter in the PO stepdown group (5.5 vs 9.2 days, P < .001). Conclusions Patients transitioned to PO antibiotics for uncomplicated streptococcal bacteremia had similar rates of clinical success compared to patients who received only IV therapy. With consideration of infectious source, severity of illness, and comorbidities, PO stepdown following initial IV antibiotics for uncomplicated streptococcal bacteremia in select patients is a reasonable approach that may result in decreased LOS and line-related complications.

Publisher

Oxford University Press (OUP)

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