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Table 1 Ranges of MICs, MIC50 and MIC90 and antibiotic resistance in 329 B. melitensis isolates

From: Antimicrobial susceptibility of Brucella melitensis in Kazakhstan

  MICs range (μg/mL) Susceptibilitya and thresholds (μg/mL) MIC50 (μg/mL) MIC90 (μg/mL) Classification of isolates, No1 (%)a
S I R Value No1 Value No1 S I R
rifampicin 0.38-16 ≤1 2 ≥4 1.5 170 8 326 123 (37.4) 72 (21.9) 87 (26.4)
rentamicin 0.5-8 ≤4 1 188 3 318 320 (97.3) 9 (2.7)
streptomycin 0.25-4 ≤8 0.75 191 3 327 329 (100)
tetracycline 0.032-0.5 ≤1 0.094 165 0.25 324 329 (100)
doxycycline 0.023-0.19 ≤1 0.047 212 0.094 319 329 (100)
  1. aDefinitions: S – susceptible, I- intermediate susceptibility, R – resistant; 1No – number of isolates