This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
[{'content': 'Child having perianal pruritus is the clinical feature of ... \nSelect and explain. \nA. E. Vermicularis, B. Ascaris, C. Ancylostoma duodenale, D. S stercoralis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Enterobius vermicularis Enterobiasis occurs mostly in Children The worm produces intense irritation and pruritus of the perianal and perineal area, when it crawls out of anus to lay eggs.This leads to scratching and excoriation of skin around anus Ref:panikers textbook of Medical parasitology 8th edition page 196', 'role': 'assistant'}]