Profile of Pseudomonas aeruginosa resistance by country and antibiotic Profile of Pseudomonas aeruginosa resistance by country and antibiotic. ▪: piperacillin/tazobactam; ▒: ceftazidime; ▓: imipenem; ░: ciprofloxacin; □: amikacin. Profile of Pseudomonas aeruginosa resistance by country and antibiotic. ▪: piperacillin/tazobactam; ▒: ceftazidime; ▓: imipenem; ░: ciprofloxacin; □: amikacin. Reproduced from [2] with permission from the publisher. H. Lode Eur Respir Rev 2007;16:50-55 ©2007 by European Respiratory Society