Antibiotic sensitivity pattern overall tested Pseudomonas isolates. PRL, piperacillin; FEP, cefepime; CDZ, ceftazidime; IPM, imipenem; AK, amikacin; TOB, tobramycin; CN, gentamycin; OFX, ofloxacin; GAT, gatifloxacin; NA, nalidixic acid; CIP, ciprofloxacin; NOR, norfloxacin; LEV, levofloxacin