Mortality of metallo-β-lactamase-producing Enterobacterales bacteremias with combined ceftazidime-avibactam plus aztreonam vs. other active antibiotics: a multicenter target trial emulation.

ABSTRACT:

Background

Bacteremias caused by metallo-β-lactamase (MBL)-producing Enterobacterales are a critical challenge due to their limited treatment options. Although ceftazidime-avibactam (CAZAVI) combined with aztreonam (ATM) has shown in vitro efficacy, no prior studies have rigorously compared its clinical effectiveness to Other Active Antibiotics (OAAs). This study aims to evaluate the efficacy and safety of CAZAVI + ATM vs. OAAs in a large cohort of MBL bacteremia.

Methods

A retrospective, multicenter, target trial emulation was conducted across 17 hospitals in Argentina between January 2016 and October 2024. Patients with confirmed MBL bacteremia who initiated active antibiotic treatment within 24 h of MBL identification and 96 h of blood sampling were included. Inverse prob

SUBMITTER: Huespe IA 

PROVIDER: S-EPMC12273443 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature