Table 1. Antimicrobial resistance profiles of vancomycin-resistant E. faecium (VREfm) clinical isolates, 1994–1995 (n = 43) versus 2013 (n = 92)a.
| Antimicrobial agent | 1994–1995 VREfm (No., %) |
2013 VREfm (No., %) |
p value |
|---|---|---|---|
| Ampicillin | 41 (95.3) | 92 (100) | 0.0998 |
| Daptomycin | 0 | 26 (28.3) | <0.0001 |
| Linezolid | 0 | 1 (1.1) | 1.0000 |
| Tetracycline | 14 (32.6) | 83 (90.2) | <0.0001 |
| Vancomycin | 43 (100) | 92 (100) | 1.0000 |
a All VREfm isolates from 1994–1995 and 2013 were resistant to erythromycin and levofloxacin. The data shown in the parenthesis are percent of isolates with resistance to specific antibiotics.