In this study, 255 of Pseudomanas aeruginosa strains isolated from various clinical samples of hospitalized patients, were investigated for their susceptibilities to aztreonam, ceftazidime, ceftriaxone, cephotaxime, cephepime, piperacillin / tazobactam, imipenem and meropenem by using disc diffusion test. One hundred – twentyfive of the strains were isolated from wound, 50 from tracheal aspiration fluid, 45 from sputum, 35 from blood, 13 from urine, 2 from pleural effusion. Susceptibity of Pseudomonas aeruginosa strains to aztreonam, ceftazidime, ceftriaxone, cephotaxime cephepime , piperacillin / tazobactam, imipenem and meropenem were % 48,8, % 45,17, % 20,82, % 36,73, % 60,67, % 61,69, and % 51,70 respectively.

The highest suspectibility rates in Pseudomanas aeruginosa strains were found to piperacillin / tazobactam, imipenem and meropenem respectively.