Table 2.
Susceptibility profile and MICs of CR-GNB to various antibiotics.
| Organisms |
Acinetobacter spp. (n = 31) |
P. aeruginosa (n = 13) |
Enterobacteriaceae (n = 14) |
|---|---|---|---|
| Susceptibility Profiles a | |||
| Antimicrobial Agents | No. of non-susceptible isolates (%) | No. of non-susceptible isolates (%) | No. of non-susceptible isolates (%) |
| Ampicillin/sulbactam | 31 (100) | ND | ND |
| Piperacillin/tazobactam | 31 (100) | 12 (92.3) | 14 (100) |
| Cefepime | 31 (100) | 11 (84.6) | 13 (92.9) |
| Meropenem | 31 (100) | 13 (100) | 14 (100) |
| Aztreonam | ND | 12 (92.3) | 14 (100) |
| Ciprofloxacin | 31 (100) | 11 (84.6) | 14 (100) |
| Tigecycline | 14 (45.2) | ND | 1 (7.1) |
| Gentamicin | 29 (93.5) | 12 (92.3) | 11 (78.6) |
| Polymyxin B | 0 (0) | 0 (0) | 1 (7.1) |
| Minimum Inhibitory Concentrations | |||
| MIC range (mg/l) | MIC range (mg/l) | MIC range (mg/l) | |
| Meropenem | 4—≥32 | 4—≥32 | 2—≥32 |
| Polymyxin B | 0.25—1 | 0.5—2 | 0.25—16 |
a Susceptibility was determined using disk diffusion defined as breakpoints provided by CLSI [18]; NOTE: MIC, minimum inhibitory concentrations; ND, not done.