Which one of the following drugs is antipseudomonal penicillin?
**Core Concept**
The antipseudomonal penicillins are a subgroup of the penicillin antibiotics that exhibit enhanced activity against Pseudomonas aeruginosa, a common Gram-negative pathogen. These drugs work by inhibiting cell wall synthesis through the binding to penicillin-binding proteins (PBPs) on the bacterial cell surface.
**Why the Correct Answer is Right**
The correct answer is Piperacillin, which is a broad-spectrum beta-lactam antibiotic that exhibits potent activity against Pseudomonas aeruginosa. This is due to its ability to inhibit the enzymes responsible for beta-lactamase production, thereby preventing the degradation of the antibiotic. Additionally, Piperacillin has a broad spectrum of activity, including against both Gram-positive and Gram-negative bacteria, including many strains of Pseudomonas species.
**Why Each Wrong Option is Incorrect**
* **Option A:** Carbenicillin is another antipseudomonal penicillin, but it is less potent and has a narrower spectrum of activity compared to Piperacillin.
* **Option B:** Amoxicillin is a broad-spectrum penicillin, but it lacks significant activity against Pseudomonas aeruginosa.
* **Option D:** Ticarcillin is another antipseudomonal penicillin, but it is less potent and has a narrower spectrum of activity compared to Piperacillin.
**Clinical Pearl / High-Yield Fact**
Piperacillin-tazobactam (a combination of Piperacillin and tazobactam) is often used in clinical practice to treat Pseudomonas infections due to its enhanced activity against this pathogen.
**Correct Answer:** C.