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Table 2 Minimal inhibitory concentrations and antibiotic susceptibility interpretations of PA (n = 92)

From: Multidrug resistant Pseudomonas aeruginosa in Estonian hospitals

Antibiotic MIC range (mg/L) MIC50 (mg/L) MIC90 (mg/L) S (%) I (%) R (%)
Beta-lactams
 Imipenem 0.5–32 24 32 19.6 20.7 59.8
 Piperacillin/tazobactam 0.5–256 16 256 50.0 0 50.0
 Meropenem 0.125–32 8 32 28.3 25.0 46.7
 Cefepime 0.5–256 6 32 70.7 0 29.3
 Ceftazidime 0.75–256 2 64 73.9 0 26.1
Ciprofloxacin 0.064–32 0.5 32 53.3 0 46.7
Aminoglycosides
 Gentamicin 0.125–256 2 48 80.4 0 19.6
 Amikacin 1–256 6 16 75.0 17.4 7.6
 Tobramycin 0.125–256 1 4 90.2 0 9.8
  1. Abbreviations: MIC50 minimal inhibitory concentration inhibiting 50% of isolates, MIC90 minimal inhibitory concentration inhibiting 90% of isolates, S susceptible, I intermediately susceptible, R resistant