Kaplan-Meier survival curves for subjects with bacteremia caused by Ec and Kp that are piperacillin-tazobactam-nonsusceptible (TZP-NS)/ceftriaxone-susceptible (CRO-S; blue), susceptible to TZP and CRO (green), and extended-spectrum β-lactamase–like (CRO-resistant, meropenem-susceptible; red). Abbreviations: CRO-R, ceftriaxone-resistant; MEM-S, meropenem-susceptible; TZP-S, piperacillin-tazobactam-susceptible.