<prompt> Carbenicillin:Is effective in pseudomonas infectionHas no effect in Proteus infectionIs a macrolide antibioticIs administered orally  <response>: Ans. A Is effective in pseudomonas infectionRef: KDT 8e p773Carbenicillin is a penicillin congener effective against pseudomonas and indole positive proteus which are not inhibited by penicillin G or ampicillinamoxicillin.It is inactive orally and excreted rapidly in urine. It is sensitive to penicillinase and acid, so administered parenterally as sodium salt. 