Table 2.
Antimicrobial susceptibilities and serotypes of 75 GBS isolates from 379 pregnant Korean women
| Antimicrobials | MIC (μg/mL) | Susceptibility results by serotype (N of S/I/R) | % of S/I/R | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Range | MIC50 | MIC90 | Ia (N = 5) | Ib (N = 8) | II (N = 4) | III(N = 15) | IV (N = 0) | V(N = 17) | VI (N = 3) | VII (N = 4) | VIII (N = 15) | IX (N = 4) | ||
| Chloramphenicol | 1– ≥ 32 | 4 | 4 | 5/0/0 | 8/0/0 | 4/0/0 | 14/1/0 | - | 14/3/0 | 3/0/0 | 4/0/0 | 15/0/0 | 4/0/0 | 94.7/1.3/4.0 |
| Clindamycin | 0.03– ≥ 256 | 0.06 | ≥ 256 | 5/0/0 | 8/0/0 | 4/0/0 | 10/0/5 | - | 10/0/7 | 3/0/0 | 1/0/3 | 15/0/0 | 4/0/0 | 84.0/0/16.0 |
| Erythromycin | 0.06– ≥ 256 | 0.06 | 128 | 5/0/0 | 8/0/0 | 4/0/0 | 5/0/10 | - | 9/0/8 | 3/0/0 | 1/0/3 | 15/0/0 | 3/1/0 | 70.7/1.3/28.0 |
| Levofloxacin | 0.05– ≥ 8 | 1 | ≥8 | 4/0/1 | 3/1/4 | 4/0/0 | 13/0/2 | - | 13/0/4 | 2/0/1 | 4/0/0 | 14/0/1 | 2/0/2 | 78.7/1.3/20.0 |
| Tetracycline | 0.12– ≥ 8 | 0.5 | ≥8 | 2/0/3 | 7/0/1 | 4/0/0 | 6/0/9 | - | 6/0/11 | 3/0/0 | 1/0/3 | 12/0/3 | 2/0/2 | 57.3/0/42.7 |
Abbreviations: GBS, group B Streptococcus; MIC, minimum inhibitory concentration; S, susceptible; I, intermediate; R, resistant.