The antibiotic resistance rates of 100 Pseudomonas aeruginosa species isolated from wound and abscess samples, sent to Şişli Etfal Research and Training Hospital Microbiology Laboratory between January-December 2002 were searched. It is aimed to determine the change in resistance rates of Pseudomonas aeruginosa species isolated from the same group of samples found in 1999 in our hospital.

The antibiotic resistance rates of Pseudomonas aeruginosa were investigated by disc diffusion method according to National Committee for Clinical Laboratory (NCCLS) criteria and the resistance rates to antibiotics were found to be high. The highest resistance was against cefepim, ceftazidim and carbapenems while the lowest resistance was against netilmycin, amicacin, tobramycin and ciprofloxacin. When we compared the change of resistance rates of the isolated Pseudomonas species between 1999 and 2002 years, a marked increase of resistance was seen in our study.