首先要了解蛲虫生活史及感染方式。蛲虫生活史简单 ,一般自食入虫卵到成虫寄生产卵整个生活史需 2～ 4周 ,不需中间宿主 ,成虫寿命很短仅 2～ 4周。成虫寄生在人体的回盲部肠腔内 ,雌雄虫交配后 ,雄虫多即死亡并随大便排出体外 ,雌虫子宫内充满虫卵 ,当宿主睡眠后 ,肛门括约肌? First of all, we must understand the life cycle of insects and infection. Insect life history is simple, usually from the eggs into the worm parasitic eggs the entire life history takes 2 to 4 weeks, without intermediate host, adult life expectancy is only 2 to 4 weeks. Adult parasites in the body’s ileocecal intestinal cavity, mating male and female, male and more deaths and excreted with the stool, the female uterus filled with eggs, when the host sleep, the anal sphincter?