Ceftazidime-Avibactam Susceptibility Breakpoints Against Enterobacteriaceae and Pseudomonas aeruginosa.

Clinical susceptibility breakpoints against Enterobacteriaceae and Pseudomonas aeruginosa for the ceftazidime-avibactam dosage regimen of 2000-500 mg every 8 hours (q8h) by 2-h intravenous infusion (adjusted for renal function) have been established by the FDA, CLSI and EUCAST as susceptible, MIC ≤8 mg/L, and resistant, MIC >8 mg/L. The key supportive data from PK/PD analyses, in vitro surveillance including molecular understanding of relevant resistance mechanisms, and efficacy in regulatory clinical trials, are collated and analyzed here