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Minimum inhibitory concentration (MIC) breakpoints of colistin sensitivity according to the European Committee on Antimicrobial Susceptibility Testing (EUCAST) and of colistin/polymyxin B sensitivity according to Clinical Laboratory and Standards Institute (CLSI).
| EUCAST Breakpoints (mg/L) | CLSI Breakpoints | |||
|---|---|---|---|---|
| S≤ | R> | I≤ | R≥ | |
| Enterobacteriaceae | 2 | 2 | 2 | 4 |
| Pseudomonas | 2 | 2 | 2 | 4 |
| Acinetobacter | 2 | 2 | 2 | 4 |
S = sensitive; R = resistant; I = Intermediate.
