Table 2.
Minimum Inhibitory Concentrations of Colistin-Susceptible and -Resistant K. pneumoniae (μg/mL).
| Patient | Isolate | Date | TZP | FEP | ATM | ERT | IPM | MEM | DOR | GEN | AMK | CIP | TGC | CST |
| A | A1 | 1/22/10 | >128/4 | >128 | >128 | >128 | >128 | >128 | 128 | 16 | 64 | 64 | 2 | 1 |
| A | A2 | 3/10/10 | >128/4 | >128 | >128 | >128 | >128 | >128 | 128 | >128 | 64 | 128 | 2 | >128 |
| B | B1 | 3/20/10 | >128/4 | >128 | >128 | >128 | 128 | 128 | 128 | >128 | 64 | 64 | 2 | 1 |
| B | B2 | 4/13/10 | >128/4 | 32 | >128 | 64 | 16 | 32 | 8 | >128 | 64 | 64 | 1 | >128 |
| C | C | 3/20/10 | >128/4 | 32 | >128 | 32 | 8 | 8 | 4 | 8 | 64 | 128 | 1 | >128 |
| D | D1 | 4/3/10 | >128/4 | >128 | >128 | >128 | 64 | 128 | 64 | >128 | 64 | 64 | 2 | 1 |
| D | D2 | 4/17/10 | >128/4 | >128 | >128 | >128 | 64 | 128 | 64 | >128 | 64 | 64 | 0.5 | 128 |
| E | E | 5/16/10 | >128/4 | >128 | >128 | >128 | 64 | 128 | 64 | 32 | 64 | 128 | 1 | 128 |
NOTE. TZP, piperacillin/tazobactam; FEP, cefepime; ATM, aztreonam; ERT, ertapenem; IPM, imipenem; MEM, meropenem; DOR, doripenem; GEN, gentamicin; AMK, amikacin; CIP, ciprofloxacin; TGC, tigecycline; CST, colistin.