What symptom is most commonly associated with Enterobius vermicularis infection?

Enterobius vermicularis, commonly known as the pinworm, is primarily associated with anal itching, particularly during the night when the female worms lay their eggs around the anal area. This intense itching can lead to discomfort and potential secondary infections due to scratching. The life cycle of the pinworm involves eggs being ingested or inhaled, leading to re-infection if proper hygiene practices are not followed.

Although some individuals may experience abdominal pain or gastrointestinal disturbances, these are less specific and not the hallmark symptoms of a pinworm infection. Diarrhea and skin rashes are also not classic symptoms associated with Enterobius vermicularis. Anal itching stands out as the most prominent and definitive symptom, making it crucial for diagnosis and subsequent treatment of this common parasitic infection.