This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infectious Disease, Subject name: Pathology
A 6-year-old girl presents with intense perianal itching, especially at night. Physical examination reveals perianal excoriation. An adhesive tape test is positive for worms. Which of the following is the most likely parasite in this patient? 
Select and explain. 
A. Ancylostoma duodenale, B. Ascaris lumbricoides, C. Enterobius vermicularis, D. Necator americanus
C: Enterobius vermicularis
Answer: C: Enterobius vermicularis 
Explanation: E. vermicularis ("pinworm") is an intestinal nematode that is encountered worldwide but is more common in temperate zones. Individuals can be infected at any age, but parasitism is more common in children. Most people complain of pruritus caused by migrating worms. Ancylostoma duodenale and Necatoamericanus (choices A and D) are hookworms associated with intestinal bleeding and iron-deficiency anemia.Diagnosis: Enterobiasis