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Percentage of false susceptibility to third- and fourth-generation cephalosporins in the groups of ESBL and AmpC producers when using the disk diffusion method.
| Antibiotic | False susceptibility (%) | |||||
|---|---|---|---|---|---|---|
| CLSI criteria | EUCAST criteria | |||||
| Breakpoint (mm) | ESBL strains (%) | AmpC strains (%) | Breakpoint (mm) | ESBL strains (%) | AmpC strains (%) | |
| Cefoperazone | ≥21 | 9 | 43 | not stated | – | – |
| Cefotaxime | ≥23 | 8 | 14 | ≥21 | 11 | 29 |
| Ceftazidime | ≥18 | 45 | 14 | ≥20 | 38 | 10 |
| Cefepime | ≥18 | 52 | – | ≥24 | 19 | – |
