Antibiotic | Enterobacteriaceae, Acinetobacter baumannii | Pseudomonas aeruginosa | ||
---|---|---|---|---|
3MRGN | 4MRGN | 3MRGN | 4MRGN | |
Piperacillin | R | R | Only one antibiotic group is susceptible | R |
Cefotaxime/Ceftazidime | R | R | R | |
Imipenem/meropenem | S | R | R | |
Ciprofloxacin | R | R | R | |
Specifications/exceptions | Count as “R” if one antibiotic of the category is resistant (e.g. imipenem OR meropenem). | Count as “R” if all antibiotics of each category are resistant (e.g. imipenem AND meropenem). | ||
If “R” for imipenem or meropenem, then always report as 4MRGN (irresp. of test result for other antibiotics). | Cefepime can also be considered in addition to ceftazidime. | |||
If carbapenemase is detected, always categorize as 4MRGN. |