蛲 ㄋㄠ ˊ náo 虫 ㄔㄨㄥ ˊ chóng 蟯 ㄋㄠ ˊ náo 蟲 ㄔㄨㄥ ˊ chóng parasitic worm human pinworm (Enterobius vermicularis)