Table 1.
Broth microdilution minimum inhibitory concentrations (MICs) for P. aeruginosa from strains isolated from ear canal (case 1) and sinuses (case 2 and case 3).
| Antibiotic | Case 1 | Case 2 | Case 3 | |||
|---|---|---|---|---|---|---|
| MIC (mg/L) |
Interpretation | MIC (mg/L) |
Interpretation | MIC (mg/L) |
Interpretation | |
| Amikacin | >32 | R | - | - | - | - |
| Aztreonam | >16 | R | ≤4 | S | ≤4 | S |
| Cefepime | >16 | R | ≤2 | S | 8 | S |
| Cefidericol | 8 | I | - | - | - | - |
| Ceftazidime | >16 | R | ≤1 | S | 4 | S |
| Ceftazidime/avibactam | >16 | R | - | - | - | - |
| Ceftolozane/tazobactam | >8 | R | - | - | - | - |
| Ciprofloxacin | >2 | R | ≤0.25 | S | >2 | R |
| Delafloxacin | >2 | R | - | - | - | - |
| Colistin | 2 | I | - | - | - | - |
| Eravacycline | 4 | (ND) | - | - | - | - |
| Gentamicin | >8 | R | ≤2 | S | >8 | R |
| Imipenem | >16/4 | R | - | - | >8 | R |
| Levofloxacin | >4 | R | ≤0.50 | S | >4 | R |
| Meropenem | >8 | R | ≤1 | S | 2 | S |
| Meropenem/vaborbactam | >16/8 | R | - | - | - | - |
| Piperacillin/tazobactam | >64 | R | ≤8 | S | ≤8 | S |
| Tobramycin | >8 | R | ≤2 | S | ≤2 | S |
Minimum inhibitory concentrations (MICs) were determined as per Clinical Laboratory Standards Institute (CLSI) guidelines in Mueller–Hinton broth. I, intermediate; ND, not determined; R, resistant; S, susceptible.