Enterobius (Oxyuris) is known as pinworm. Wuchereria is filarial worm, while Ancyclostoma is called as hookworm. Ancyclostoma duodenale, found in duodenum of small in human being cause ancyclostomiasis.Wuchereria is also endoparasite in lymphatic vessels and lymph node of human being and cause serious filariasis or elephantiasis. Enterobius vermicularis is found in caecum colon and in vermiform appendix of human being.