multidrug resistance antimicrobial phenotype multidrug-resistant Acinetobacter ARO:3004312 Any strain of an Acinetobacter spp. that has either tested Intermediate or Resistant to at least one antibiotic drug in at least 3 of the 6 following categories: 1) Extended-spectrum cephalosporins, 2) Fluoroquinolone, 3) Aminoglycosides, 4) Carbapenems, 5) Piperacillin group, and 6) Ampicillin/sulbactam. antibiotic_resistance