TABLE 6.
Results of testing for E. faecium WHO-3
| Antimicrobial agent (no. of labs that tested antimicrobial agents)a | Reference result (category)
|
No. of labs reporting disk diffusion results (range of zone diameters in mm)
|
No. of labs reporting MIC results (range of MICs in μg/ml)
|
|||||
|---|---|---|---|---|---|---|---|---|
| MIC in μg/ml | Disk zone diameter in mm | S | I | R | S | I | R | |
| Ampicillin (95) | 4 (S) | 19 (S) | 36 (17–36)b | 0 | 19 (6–16)c | 39 (1–8)d | 0 | 1 (>4) |
| Penicillin (71) | 32 (R) | 6 (R) | 4 (15–20)e | 0 | 32 (6–13) | 10 (8) | 0 | 25 (>1–>16) |
| Teicoplanin (26) | 256 (R) | 6 (R) | 1 (17) | 3 (11–12)e | 19 (6–10) | 1 (0.25) | 0 | 2 (>16–32) |
| Vancomycin (117) | 512 (R) | 6 (R) | 3 (21–30) | 0 | 63 (6–12) | 0 | 0 | 51 (>8–64)d |
| β-Lactamase (39) | Negative | 36 negative, 3 positive | ||||||
a
Labs returning results, 122.
b
Three incorrectly called intermediate.
c
One incorrectly called susceptible.
d
One incorrectly called intermediate.
e
One incorrectly called resistant.