Table 1.
Range | MIC50 | MIC90 | Breakpoint | %Ia | %Rb | Breakpoint | %Ia | Rb | |||
---|---|---|---|---|---|---|---|---|---|---|---|
CLSI 2009 | EUCAST2009 | ||||||||||
S | R | S | R | ||||||||
PIP | ≤ 16- > 64 | 64 | > 64 | ≤ 64 | ≥128 | - | 39 | ≤ 16 | > 16 | - | 97 |
TIC | ≤ 16- > 64 | 64 | > 64 | ≤ 64 | ≥128 | - | 42 | ≤ 16 | > 16 | - | 98 |
TZP | ≤ 16/4- > 64/4 | 64/4 | > 64/4 | ≤ 64/4 | ≥128/4 | - | 35 | ≤ 16/4 | > 16/4 | - | 93 |
ATM | 2- > 16 | 16 | > 16 | ≤ 8 | ≥32 | 85 | 14 | ≤ 1 | > 16 | 85 | 14 |
CAZ | 2- > 16 | 16 | > 16 | ≤ 8 | ≥32 | 75 | 22 | ≤ 8 | > 8 | - | 97 |
FEP | 2- > 16 | 16 | > 16 | ≤ 8 | ≥32 | 82 | 17 | ≤ 8 | > 8 | - | 99 |
GEN | ≤ 4- > 8 | > 8 | > 8 | ≤ 4 | ≥16 | 0 | 99 | ≤ 4 | > 4 | - | 99 |
TOB | ≤ 4- > 8 | > 8 | > 8 | ≤ 4 | ≥16 | 1 | 95 | ≤ 4 | > 4 | - | 96 |
AMK | ≤ 8- > 16 | ≤ 8 | > 16 | ≤ 16 | ≥64 | 0 | 21 | ≤ 8 | > 16 | 29 | 21 |
IPM | 8- > 8 | > 8 | > 8 | ≤ 4 | ≥16 | 10 | 90 | ≤ 4 | > 8 | 10 | 90 |
MEM | 8- > 8 | > 8 | > 8 | ≤ 4 | ≥16 | 33 | 67 | ≤ 2 | > 8 | 33 | 67 |
CIP | 2- > 2 | > 2 | > 2 | ≤ 1 | ≥4 | 2 | 98 | ≤ 0.5 | > 1 | 100 | |
Colistin | ≤ 2 | ≤ 2 | ≤ 2 | ≤ 2 | ≥4 | 0 | 0 | ≤ 2 | > 2 | 0 | 0 |
a Intermediate.
b Resistant.
PIP = Piperacillin; TIC = Ticarcillin; TZP = Piperacillin-tazobactam; ATM = Aztreonam; CAZ = Ceftazidime; FEP = Cefepime; GEN = Gentamicin; TOB = Tobramycin; AMK = Amikacin; IPM = Imipenem; MEM = Meropenem; CIP = Ciprofloxacin.