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A mother brings her four-year-old child to a doctor with a complaint of intense perianal itching. Despite being fed properly, he had not gained weight for the last few months. The likely condition is:

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A mother brings her four-year-old child to a doctor with a complaint of intense perianal itching. Despite being fed properly, he had not gained weight for the last few months. The likely condition is: Answer: Pinworm infection (Enterobiasis)

Intense perianal itching, particularly in a young child, is highly characteristic of Enterobius vermicularis infection or enterobiasis. Female pinworms migrate to the perianal region to deposit eggs, commonly producing significant nocturnal itching and disturbed sleep in affected children.

Question context

This question is part of 🦠 Microbiology within the broader 🧬 Medical Science subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.