Table 1.
MIC range and MIC50 and MIC90 values of antimicrobial agents.
| Antibiotic | Range (µg/mL) | MIC50 (µg/mL) | MIC90 (µg/mL) | Breakpoint for susceptibility (µg/mL) |
|---|---|---|---|---|
| Gentamicin | 0.047–0.94 | 0.125 | 0.19 | ≤4a |
| Streptomycin | 0.125–1 | 0.5 | 0.75 | ≤8a |
| Cotrimoxazole | 0.004–0.25 | 0.047 | 0.125 | ≤2a |
| Doxycycline | 0.032–1 | 0.125 | 0.25 | ≤1a |
| Tetracycline | 0.023–0.64 | 0.065 | 0.19 | ≤1a |
| Rifampicin | 0.38–2 | 1.5 | 1 | ≤1b |
aClinical and Laboratory Standards Institute (CLSI), 2013. Method for Antimicrobial Dilution and Disk Susceptibility testing of Infrequently Isolated or fastidious Bacteria, Second Edition, M45-A2 [12]. bClinical and Laboratory Standards Institute (CLSI), 2014. Method for Antimicrobial Dilution and Disk Susceptibility Testing of Haemophilus influenzae, M100-S24 [13].