TABLE 2.
Summary of MICs of antimicrobials determined in duplicate by the microdilution method for B. mayonis sp. nov. (Bm) and B. savannae sp. nov. (Bs)
| Antimicrobial substance | MIC (mg/liter) |
||||||
|---|---|---|---|---|---|---|---|
| Resistance breakpoint (mg/liter) if available | Bm BDU6T |
Bm BDU8 |
Bs MSMB266T |
Bs MSMB852 |
Bs BDU18 |
Bs BDU19 |
|
| Amoxicillin/clavulanic acida | ≥32/16 (40) | 8/4 | ≤4/2 | 8/4 | 8/4 | 8/4 | 8/4 |
| Azithromycin | >64 | >64 | >64 | >64 | >64 | >64 | |
| Carbenicillin | 128 | 64 | 64 | 32 | 64 | 64 | |
| Ceftazidime | ≥32 (40) | ≤4 | ≤4 | ≤4 | ≤4 | ≤4 | ≤4 |
| Ceftazidime-avibactamb | 4/4 | 1/4 | ≤0.5/4 | ≤0.5/4 | ≤0.5/4 | ≤0.5/4 | |
| Chloramphenicol | ≥32 (41) | 32 | 16 | 8 | 16 | 8 | 16 |
| Ciprofloxacin | 2 | ≤0.5 | ≤0.5 | ≤0.5 | 1 | 1 | |
| Doripenem | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | |
| Doxycycline | ≥16 (40) | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 |
| Gentamicin | 32 | >64 | 32 | 32 | 64 | 64 | |
| Imipenem | ≥16 (40) | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 |
| Kanamycin | 16 | 32 | 16 | 16 | 16 | 32 | |
| Meropenem | ≥16 (41) | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 |
| Piperacillin | ≤8 | ≤8 | ≤8 | ≤8 | ≤8 | ≤8 | |
| Piperacillin-tazobactam | ≤8/4 | ≤8/4 | ≤8/4 | ≤8/4 | ≤8/4 | ≤8/4 | |
| Polymyxin B | 512 | >2048 | 512 | >2048 | >2048 | >2048 | |
| Sulfamethoxazole | >512 | 256 | >512 | >512 | >512 | >512 | |
| Tigecycline | 1 | 0.5 | 2 | 1 | 1 | 1 | |
| Trimethoprim | 4 | 4 | 2 | ≤1 | 4 | 2 | |
| Trimethoprim/sulfamethoxazole | ≥4/76 (40) | 2/38 | ≤1/19 | ≤1/19 | ≤1/19 | ≤1/19 | ≤1/19 |
a
For amoxicillin-clavulanic acid, clavulanic acid was maintained at 4 μg/ml in all wells.
b
For ceftazidime-avibactam, avibactam was maintained at 4 μg/ml in all wells.