| Drugs name and concentration | K. pneumoniae (n = 16) | E. coli (n = 4) | Acinetobacter sp. (n = 4) |
| Ampicillin (10 μg) | 0 | 0 | 0 |
| Amoxicillin + clavulanic acid (20/10μg) | 0 | 50 | 0 |
| Piperacillin + tazobactam (100/10μg) | 56 | 75 | 75 |
| Cefuroxime (30 μg) | 0 | 50 | 0 |
| Cefotaxime (30 μg) | 0 | 75 | 0 |
| Gentamicin (10 μg) | 19 | 100 | 25 |
| Amikacin (30 μg) | 81 | 100 | 75 |
| Imipenem (10 μg) | 87 | 100 | 75 |