Table 2 Susceptibility of polymyxin-resistant CRKP strains to commonly used antibiotics (n = 112)
Antibiotics | MIC50 (µg/mL) | MIC90 (µg/mL) | No. of isolates (%) | |
|---|---|---|---|---|
Susceptible | Resistant | |||
Polymyxin B | >8 | >8 | 0 (0%) | 112 (100%) |
Meropenem | 128 | >128 | 0 (0%) | 112 (100%) |
Ertapenem | >128 | >128 | 0 (0%) | 112 (100%) |
Imipenem | 64 | >128 | 0 (0%) | 111 (99.11%) |
Cefepime | >64 | >64 | 0 (0%) | 112 (100%) |
Ceftazidime | >128 | >128 | 0 (0%) | 112 (100%) |
Cefotaxime | >128 | >128 | 0 (0%) | 112 (100%) |
Cefmetazole | >128 | >128 | 11 (9.82%) | 99 (88.39%) |
Aztreonam | >128 | >128 | 1 (0.89%) | 111 (99.11%) |
Piperacillin-tazobactam | >256/4 | >256/4 | 0 (0%) | 112 (100%) |
Cefoperazone-sulbactam | >256/128 | >256/128 | 0 (0%) | 112 (100%) |
Ceftazidime-avibactam | 1/4 | 4/4 | 104 (92.86%) | 8 (7.14%) |
Ciprofloxacin | >32 | >32 | 4 (3.57%) | 108 (96.43%) |
Amikacin | >128 | >128 | 32 (28.57%) | 80 (71.43%) |
Tigecycline | 1 | 1 | 101 (90.18%) | 11 (9.82%) |
