Tested antibiotics^a and concentrations^b.

aAMX, amoxicillin; OXA, oxacillin; VAN, vancomycin; GEN, gentamicin; STX, sulfamethoxazole/trimethoprim; AMC, amoxicillin/clavulanate; PIP, piperacillin; TZP, piperacillin/tazobactam; CIP, ciprofloxacin; CAZ, ceftazidime; bThese concentrations were based upon the CLSI breakpoints for susceptibility. sFor Staphylococcus aureus. EcFor Enterococcus species. EbFor Enterobacteriaceae. PFor Pseudomonas aeruginosa. NFor non-fermenters. AFor all strains.