Table 2.
Characteristics of vancomycin-heteroresistant strains (according to PAP test)
| Species | Strain | Isolation site | MR (CF disk inhibition zone diameters in mm) | Growth on BHI medium with vancomycin (mg/L) | MIC VAN (mg/L) | MIC TEIC (mg/L) | Autolytic activity (%) |
|---|---|---|---|---|---|---|---|
| S. warneri | SV139 | Wound | + (18) | 6 | 1 | 3 | 13 |
| SV139V6 | 14 | ||||||
| S. haemolyticus | SV130 | Wound | + (10) | 6 | 2 | 4 | 10 |
| SV130V6 | 12 | ||||||
| SV70 | Blood | + (0) | 8 | 2 | 4 | 12 | |
| SV70V8 | 13 | ||||||
| SV345 | Blood | + (0) | 8 | 1 | 4 | 12 | |
| SV345V8 | 14 | ||||||
| SV265 | Wound | + (8) | 12 | 1 | 12 | 12 | |
| SV265V12 | 9 |
MR, methicillin resistance; CF, cefoxitin (30 µg); MIC, minimum inhibitory concentration; VAN, vancomycin; TEIC, teicoplanin; Vx, derivative strain selected in the presence of vancomycin in concentration x (mg/L)