TABLE 1.

Antimicrobial susceptibility testing results for Acinetobacter genospecies 3 isolates from three medical centers in Taiwand

Antimicrobial agentaMIC (μg/ml)Resistance (%)
Range50%90%
Piperacillin8-≥128≥128≥12863.2
Piperacillin-tazobactam8-≥128≥128≥12857.9
Ampicillin-sulbactam4-≥324≥3215.8
Ceftriaxone8-≥64≥64≥6463.2
Ceftazidime4-≥64≥64≥6468.4
Cefepime4-≥32≥32≥3263.2
Aztreonam16-≥32≥32≥3294.7
Imipenem0.25-64163257.9
Meropenem0.5-64163257.9
Tobramycin≤0.5-≥168≥1642.1
Gentamicin1-≥168≥1652.6
Amikacin16-≥6432≥6452.6
Ciprofloxacin0.12-160.2525.3
Sulbactamb0.5-4240
Tigecyclinec≤0.12-20.120.50
Colistin1-2120
  • a The breakpoints used were according to CLSI guidelines (6).

  • b The breakpoints used were defined based on the guidelines of a Spanish antibiogram committee (the MENSURA group) for nonfermenting Gram-negative bacteria (susceptible, ≤8 μg/ml; intermediate, 16 μg/ml; resistant, ≥32 μg/ml) (23).

  • c The breakpoints used were defined based on the U.S. Food and Drug Administration (FDA) susceptibility breakpoints for the Enterobacteriaceae (susceptible, ≤2 μg/ml; intermediate, 4 μg/ml; resistant, ≥8 μg/ml) (25).

  • d Nineteen isolates were tested.