TABLE 3.
Induction and maintenance of FDC nonsusceptibility
| Strain | MHA test result |
||
|---|---|---|---|
| DD (mm) | S/NSa | MIC (mg/L) in ID-CAMHB | |
| Abau3 postinduction with 32 mg/L from agar plate with 32 mg/L FDC | 6 | NS | >32 |
| Abau3 postinduction with 32 mg/L from FDC-free agar plate | 18 | S | 2 |
a
Characterized as susceptible (S) or nonsusceptible (NS) in accordance with the EUCAST breakpoints for FDC and AST; a zone diameter of ≥17 mm is typical for isolates with MIC values of ≤2 mg/L (Enterobacterales, Pseudomonas aeruginosa, and the pharmacokinetic/pharmacodynamic breakpoint) (31).