Abstract
The in vitro activities of gentamicin, tobramycin, amikacin, azlocillin, carbenicillin, mezlocillin, piperacillin, ticarcillin, cefotaxime, ceftizoxime, cefoperazone, cefsulodin, moxalactam, ceftazidime, ceftriaxone, and N -formimidoyl thienamycin were measured against 62 isolates of Pseudomonas aeruginosa obtained from patients with cystic fibrosis. Ceftazidime and N -formimidoyl thienamycin were the most active of these agents.