Table 3.
Interpretive criteria of the MIC values for C. difficile isolates
| Antibiotic agent | (μg/ml) |
No. of isolates with MIC of (µg/ml) |
Susceptibility profile |
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S | I | R | 0.5 1 2 4 8 16 32 64 128 256 | S (%) | I (%) | R (%) | ||||||||||
| Metronidazole* | ≤8 | 16 | ≥32 | 12 | 1 | - | - | - | - | - | - | 3 | - | 81.3 | - | 18.7 |
| Vancomycin§ | ≤2 | 4 | ≥8 | 12 | - | - | 1 | 3 | - | - | - | - | 75 | 6.3 | 18.7 | |
| Rifampicin§ | - | - | ≥4 | - | - | - | - | 16 | - | - | - | - | - | - | - | 100 |
| Clindamycin* | ≤2 | 4 | ≥8 | 1 | - | - | 13 | - | 2 | - | - | - | - | 6.3 | 81.2 | 12.5 |
Breakpoints were defined as susceptible (S), intermediately resistant (I), or resistant (R) with reference to CLSI (*) or published data (§)