TABLE 1.

Number of S. aureus isolates tested for susceptibility from 2000 to 2004 and vancomycin MICs

YrNo. of strainsNo. (%) of strains with vancomycin MIC (μg/ml) of:
≤0.51≥2
2000945755 (79.9)188 (19.9)2 (0.2)
20011,026830 (80.9)194 (18.9)2 (0.2)
20021,317851 (64.6)462 (35.1)4 (0.3)
20031,297779 (60.1)515 (39.7)3 (0.2)
20041,418408 (28.8)998 (70.4)a12 (0.8)
Total6,0033,623 (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.