<prompt> Which of the following drugs is effective against Pseudomonas infection ?AmpicillinCeftriaxoneColistinCefixime  <response>: Ans. is c i.e., Colistin o Polypeptides like colistin and polymyxin B are effective against pseudomonas. o Carbenicillin, ticarcillin, piperacillin, azlocillin and mezlocillin are the penicillins effective against pseudomonas whereas cefoperazone, ceftazidime, cefepime and cefpirome are cephalosporins effective against pseudomonas. 