Table 1.
Ranges of MICs, MIC50 and MIC90 and antibiotic resistance in 329 B. melitensis isolates
| 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) | – | – |
aDefinitions: S – susceptible, I- intermediate susceptibility, R – resistant; 1No – number of isolates