Drug of choice for treating schistosoma haematobium is –
**Core Concept**
Schistosoma haematobium is a parasitic flatworm that causes urinary schistosomiasis, a disease characterized by chronic inflammation and fibrosis of the urinary tract. The treatment of choice for S. haematobium infection involves antiparasitic medication that targets the worm's life cycle.
**Why the Correct Answer is Right**
Praziquantel is the drug of choice for treating S. haematobium infection because it acts as a nicotinic acetylcholine receptor antagonist, interfering with the worm's neuromuscular function and causing paralysis and eventual death. Praziquantel also induces the release of adult worms and eggs from the host's tissues, facilitating their excretion from the body.
**Why Each Wrong Option is Incorrect**
**Option A:** None of the other options are correct, but for the sake of completeness, note that other antiparasitic medications like albendazole and ivermectin are not typically used to treat S. haematobium infection.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that Praziquantel is the only FDA-approved medication for the treatment of S. haematobium infection, and its effectiveness in reducing egg excretion and preventing disease progression has been well-established in numerous clinical trials.
**Correct Answer:** A. Praziquantel.