Effectiveness of empiric aztreonam compared to other beta-lactams for treatment of infections.

Purpose: To evaluate the use of aztreonam as an active empiric therapy against subsequent culture of .

Methods: This was a retrospective cohort study conducted among patients who received either aztreonam or an antipseudomonal beta-lactam (BL) as an empiric therapy with subsequent culture with . All patients with at least one positive culture for between January 2014 and August 2016 were included in this analysis.