Which of the following drug is effective against both Pseudomonas and Proteus?: (A) Cloxacillin, (B) Amoxicillin, (C) Carbenicillin, (D) Ampicillin
Answer is C. Carbenicillin is effective against both proteus and pseudomonas. Cloxacillin is a -penicillinase resistant penicillin. - It is mainly effective against gram positive bacteria paicularly those producing penicillinase. - It is not effective against proteus or pseudomonas. Amoxicillin and ampicillin are wide spectrum penicillins. - These are effective against many gram negative bacteria including proteus. However, these are not effective against Pseudomonas. ANTI-PSEUDOMONAL PENICILLINS C: Carbenicillin T: Ticarcillin M: Mezlocillin A: Azlocillin P: Piperacillin