Percentage resistance to various antimicrobial agents among 148 A. baumannii isolates. AK, amikacin; CN, gentamicin; TOB, tobramycin; IPM, imipenem; MEM, meropenem; FEP, cefepime; CTX, cefotaxime; CAZ, ceftazidime; CRO, ceftriaxone; TZP, piperacillin-tazobactam; SAM, ampicillin-sulbactam; CIP, ciprofloxacin; SXT, sulfamethoxazole-trimethoprim; CT, colistin; TGC, tigecycline.