Table 1.
In vitro antimicrobial susceptibilities of the strain, and interpretation according to Comité d’Antibiogramme de la Société Française de Microbiologie 2013 recommendations, using Pseudomonas aeruginosa ATCC 27853 and Escherichia coli ATCC 25922 as quality control
| Antibiotics | MIC (μg/mL) | IZD (mm) |
Breakpoint (S) |
Categorization | |
|---|---|---|---|---|---|
| μg/mL | mm | ||||
| Ampicillin |
≥256 |
0 |
≤16 |
≥22 |
Resistant |
| Piperacillin |
16 |
20 |
≤16 |
≥18 |
Susceptible |
| Ticarcillin |
≥256 |
0 |
≤16 |
≥22 |
Resistant |
| Temocillin |
≥256 |
0 |
≤16 |
≥22 |
Resistant |
| Cephalothin |
≥256 |
0 |
≤16 |
≥22 |
Resistant |
| Cefuroxime |
≥256 |
0 |
≤16 |
≥22 |
Resistant |
| Cefotaxime |
32 |
8 |
≤16 |
≥22 |
Resistant |
| Ceftazidime |
4 |
25 |
≤08 |
≥19 |
Susceptible |
| Ceftriaxone |
32 |
8 |
≤16 |
≥22 |
Resistant |
| Cefepime |
4 |
28 |
≤08 |
≥19 |
Susceptible |
| Cefotetan |
≥32 |
6 |
≤16 |
≥22 |
Resistant |
| Imipenem |
≥32 |
6 |
≤04 |
≥22 |
Resistant |
| Meropenem |
32 |
6 |
≤02 |
≥22 |
Resistant |
| Ertapenem |
≥32 |
6 |
≤02 |
≥22 |
Resistant |
| Aztreonam |
≥32 |
8 |
≤01 |
≥27 |
Resistant |
| Trimethoprim-sulfamethoxazole |
≤0.25 |
22 |
≤2 |
≥16 |
Susceptible |
| Nalidixic acid |
≤2 |
28 |
≤08 |
≥20 |
Susceptible |
| Gentamicin |
ND |
4 |
ND |
≥16 |
Resistant |
| Amikacin |
ND |
0 |
ND |
≥17 |
Resistant |
| Tobramycin |
ND |
0 |
ND |
≥16 |
Resistant |
| Colistin | ND | 0 | ND | – | Resistant |
Abbreviations: IZD, inhibition zone diameter; MIC, minimum inhibitory concentration. ‘ND’, Not Determined; ‘–’ Colistin breakpoint not given. S, sensitivity.