Table 3.
Susceptibility rates of Streptococcus pyogenes to different antibiotics
| Antibiotics | Mean Values ± SD (mm) | Cut off values Sensitive (CLSI)(μg/mL) | Sensitive n = (%) | Intermediate n = (%) | Resistant n = (%) |
|---|---|---|---|---|---|
| Ampicillin (n=50) | 0.76 ± 2.61 | ≤0.25 | 46 (92) | 0 | 4 (8) |
| Cefotaxime (n=48) | 0.40 ± 1.30 | ≤0.5 | 46 (95.8) | 0 | 2 (4.2) |
| Erythromycin (n=47) | 4.30 ± 3.21 | ≤0.25 | 8 (17) | 0 | 39 (83) |
| Tetracycline (n=49) | 7.58 ± 7.89 | ≤ 2 | 24 (49) | 0 | 25 (51) |
| Levofloxacin (n=45) | 2.03 ± 4.22 | ≤ 2 | 39 (86.7) | 2 (4.4) | 4 (8.9) |
| Clindamycin (n=50) | 1.40 ± 0.49 | ≤0.25 | 30 (60) | 0 | 20 (40) |
| Benzylpenicillin (n=38) | 0.33 ± 1.31 | ≤0.12 | 35 (92.1) | 3 (7.9) | 0 |
| Ceftriaxone (n=38) | 0.35 ± 1.28 | ≤0.5 | 36 (94.7) | 0 | 2 (5.3) |