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  • Title: Implementation of a cefazolin-based stewardship pathway for methicillin-susceptible Staphylococcus aureus bloodstream infections paired with infectious diseases consultation.
    Author: Lee BJ, Rao SN, Wang SK, Lee JY, Lakada IY, Gilbert EM, Barr VO, Postelnick MJ, Sutton SH, Zembower TR, Bolon M, Scheetz MH, Rhodes NJ.
    Journal: Int J Antimicrob Agents; 2017 May; 49(5):650-654. PubMed ID: 28279787.
    Abstract:
    Methicillin-susceptible Staphylococcus aureus (MSSA) infections have been successfully treated both with cefazolin and antistaphylococcal penicillins; cefazolin appears effective in MSSA bloodstream infections (BSIs). Thus, our antimicrobial stewardship programme (ASP) implemented a clinical pathway supporting cefazolin use in MSSA-BSIs and restricting oxacillin use to infectious diseases (ID) consultation due to cefazolin's lower cost and more convenient dosing. This before and after quasi-experimental study was conducted to describe the impact on outcomes and process of care measures associated with implementing this pathway among patients with MSSA-BSI. Definitive treatment with cefazolin increased over the study period from 17.3% to 69.8% post-implementation. Clinical failure (5.8% vs. 2.3%; P = 0.62) and in-hospital mortality (3.8% vs. 0%; P = 0.50) were rare pre- and post-implementation. Median hospital length of stay among survivors was similar between pre- and post-implementation periods (P = 0.31). Duration of bacteraemia [median (IQR) 3 (2-4) days vs. 2 (2-3) days; P = 0.002] and rates of re-infection after culture clearance (9.6% vs. 0%; P = 0.06) were reduced post-implementation. Frequency of source control (P = 0.71) and time to source control (P = 0.52) were similar between study periods. Significant increases in ID consultations (33.3% [3/9] vs. 73.3% [22/30]; P = 0.047) and median (IQR) 24-h daily doses [2 (1-3) g vs. 6 (3-6) g; P < 0.01] were seen for patients treated with cefazolin post-implementation. ASPs may find implementation of a similar pathway to be an effective means of improving the care of patients infected with MSSA.
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