蛔虫病是人体最常见的寄生虫病,多见于幼儿,而农村幼儿的感染率多数高于城市。据调查,某公社某大队334名1～7岁小儿的蛔虫感染率高达98.5％,几乎每个小儿均被感染。蛔虫对小儿的危害不仅是有阵发性的腹痛或吃饭不长肉,还可能引起各种各样的症状。蛔虫形如蚯蚓,两端较尖,长约20公分,寄生在人体小肠内。雌雄交配后,每条雌虫每天可产卵20万个,可见其繁殖力之大,虫卵随粪便排出后,在适宜的条件下,经一个月左右即发育成含有幼虫的卵。这种虫卵被人吞食后,先在小肠内孵出幼虫。因小肠的环 Ascariasis is the most common parasitic disease in the human body, more common in young children, while the majority of children infected in rural areas than the prevalence of the city. According to the survey, a commune brigade 334 1 to 7-year-old children ascaris infection rate as high as 98.5%, almost every infantile infection. Roundworm harm to children not only have paroxysmal abdominal pain or eat less meat, but also may cause a variety of symptoms. Roundworm shaped like earthworms, both ends of the more pointed, about 20 cm, parasitic in the human small intestine. After the male and female mating, each females can spawn 200,000 per day, showing its fertility, the eggs with feces after discharge, under appropriate conditions, after about a month or larvae develop into eggs. After the eggs have been swallowed, larvae are hatched in the small intestine. Due to the ring of the small intestine