TABLE 6.
TEL MIC values of predominant STs in E. faecium isolates carrying the ermB and ermC genes.
| ST | No. (%) | TEL MIC (μg/mL) |
ERY MIC (μg/mL) |
ermB | ermC | ||||||||
| ≤0.5 | 1 | 2 | 4 | ≥8 | MIC50/MIC90 | ≤0.5 | 1–4 | ≥8 | MIC50/MIC90 | ||||
| ST18 | 18 (12.3) | 3 | 0 | 0 | 0 | 15 | 8/8 | 0 | 1 | 17 | >256/>256 | 1 | 17 |
| ST78 | 26 (21.3) | 4 | 1 | 0 | 9 | 12 | 4/8 | 3 | 1 | 22 | 128/>256 | 16 | 3 |
| ST80 | 7 (5.7) | 0 | 0 | 1 | 3 | 3 | 4/8 | 0 | 0 | 7 | >128/>128 | 4 | 0 |
MIC, minimum inhibitory concentration; TEL, telithromycin; ERY, erythromycin; MIC50/MIC90, the MIC values for 50% or 90% of bacterial growth inhibition.