Table 1. Antibiotic susceptibility of the S. maltophilia clinical isolates (n = 88).
| Disc diffusion method | ||||
|---|---|---|---|---|
| Antimicrobial agents | Zone diameter interpretive criteria | Percentage of susceptible stains | ||
| S | I | R | ||
| Ciprofloxacin** | ≥21 | 16–20 | ≤15 | 100% |
| Chloramphenicol* | ≥18 | 13–17 | ≤12 | 100% |
| Tetracycline** | ≥15 | 12–14 | ≤11 | 100% |
| Levofloxacin | ≥17 | 14–16 | ≤13 | 100% |
| Microdilution method | ||||
| S | I | R | ||
| TMP/SMX | ≤2/38 | - | ≥4/76 | 100% |
*—brakpoints for E. coli ATCC25922
**—breakpoints for P. aeruginosa ATCC27853
TMP/SMX—trimethoprim/sulfamethoxazole.