TABLE 1.
Number of S. aureus isolates tested for susceptibility from 2000 to 2004 and vancomycin MICs
| Yr | No. of strains | No. (%) of strains with vancomycin MIC (μg/ml) of:
|
||
|---|---|---|---|---|
| ≤0.5 | 1 | ≥2 | ||
| 2000 | 945 | 755 (79.9) | 188 (19.9) | 2 (0.2) |
| 2001 | 1,026 | 830 (80.9) | 194 (18.9) | 2 (0.2) |
| 2002 | 1,317 | 851 (64.6) | 462 (35.1) | 4 (0.3) |
| 2003 | 1,297 | 779 (60.1) | 515 (39.7) | 3 (0.2) |
| 2004 | 1,418 | 408 (28.8) | 998 (70.4)a | 12 (0.8) |
| Total | 6,003 | 3,623 (60.4) | 2,357 (39.3) | 23 (0.4) |
a
P < 0.01 compared to the percentage of S. aureus strains with a MIC of 1 μg/ml in 2000.