Ivermectin in indicated in the treatment of –
**Core Concept**
Ivermectin is an anthelmintic medication used to treat various parasitic infections. Its mechanism of action involves binding to glutamate-gated chloride channels in invertebrate nerve and muscle cells, leading to hyperpolarization and paralysis of the parasite.
**Why the Correct Answer is Right**
The correct answer is **Strongyloidiasis**. Ivermectin is effective in treating strongyloidiasis due to its ability to kill the larvae and adult forms of the parasite. This is particularly useful in patients with immunocompromised states, where the parasite can cause autoinfection. The mechanism of action of ivermectin involves the inhibition of the glutamate-gated chloride channels, which are essential for the transmission of nerve impulses in the parasite.
**Why Each Wrong Option is Incorrect**
**Option A:** Leishmaniasis - Ivermectin is not indicated for the treatment of leishmaniasis, which is typically treated with antimonials such as sodium stibogluconate or miltefosine.
**Option B:** Filariasis - While ivermectin is used to treat filariasis, it is not the correct answer in this context. The question is asking for a specific indication of ivermectin, and strongyloidiasis is a more specific indication.
**Option D:** Scabies - Ivermectin is sometimes used to treat scabies, but it is not the primary indication. The correct answer is strongyloidiasis.
**Clinical Pearl / High-Yield Fact**
Ivermectin is a broad-spectrum anthelmintic that is effective against a wide range of parasites, including strongyloides, onchocerca, and filarial worms. It is essential to note that ivermectin is not effective against tapeworms or hookworms, which require different treatment regimens.
**Correct Answer:** C. Strongyloidiasis