Which clinical feature most strongly suggests pinworms infection in a preschool child?

Which clinical feature most strongly suggests pinworms infection in a preschool child?

• A. Nighttime perianal itching
• B. Diarrhea
• C. Vomiting
• D. Abdominal pain

Answer: (A)

Nighttime perianal itching is the feature that most strongly points to pinworm infection. Enterobius vermicularis migrate to the perianal area at night to lay eggs, causing intense itching that often awakens a preschooler and leads to scratching. This nocturnal, perianal itch is much more specific to pinworms than the other symptoms listed. Diarrhea, vomiting, and abdominal pain can occur with many conditions and are not characteristic of pinworm infections, even though they may appear in some cases. A simple morning tape test can help confirm by collecting eggs around the anus.

Nighttime perianal itching is the feature that most strongly points to pinworm infection. Enterobius vermicularis migrate to the perianal area at night to lay eggs, causing intense itching that often awakens a preschooler and leads to scratching. This nocturnal, perianal itch is much more specific to pinworms than the other symptoms listed. Diarrhea, vomiting, and abdominal pain can occur with many conditions and are not characteristic of pinworm infections, even though they may appear in some cases. A simple morning tape test can help confirm by collecting eggs around the anus.