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Table 1 MIC range and MIC50 and MIC90 values of nine antimicrobial agents

From: In vitro antimicrobial susceptibility testing of human Brucella melitensis isolates from Ulanqab of Inner Mongolia, China

Antibiotic Range (μg/mL) MIC50 (μg/mL) MIC90 (μg/mL) (S) (I) (R) Breakpoint for Susceptibility (μg/mL)
Minocycline 0.032 0.032 0.032 85 ≤0.5a
Sparfloxacin 0.032 0.032 0.032 85 ≤0.5a
Doxycycline 0.032–0.25 0.125 0.25 85 ≤1
Tetracycline 0.064–1.0 0.25 0.5 85 ≤1
Ciprofloxacin 0.125–1.0 0.5 0.5 85 ≤1a
Levofloxacin 0.125–1.0 0.5 0.5 85 ≤1
Gentamicin 0.25–1.0 0.5 1.0 85 ≤4a
Rifampin 0.5–2.0 0.5 1.0 59 25 1 ≤2a
Cotrimoxazole 0.032–2.0 0.5 1.0 79 6 ≤2/38
  1. aCLSI breakpoints for slow-growing bacteria (Haemophilus spp.)