ARDM v.1, PCR and phenotypic β-lactamase/ESBL profiles of the clinical and reference strains used in this study.

N/A – not available. R – resistant, I – intermediate, S – sensitive.aThe identified family to which the CTX-M allele belongs is indicated in parentheses.bWhile no official ATM resistance criteria for A. baumannii are available, all isolates of this species designated as resistant (R) in the above table showed no zone of inhibition around ATM disks.cWeakly positive detection by PCR.