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1991年10月至1992年2月用改良加藤厚涂片法对厂子弟学校中、小学生进行粪检．凡服蛔虫感染者均给予顿服阿苯达唑400mg，服药两周后复查现察虫卵阴转率。并从阴转学生中随机抽取162名（分别在4个班级），设为现察组和对照组，对前者每周上一节卫生常识课，配合一次个人卫生检查
October 1991 to February 1992 with improved Kato thick smear method factory children school, primary school students for fecal examination. Persons who take Ascaris infection were given Dayton albendazole 400mg, two weeks after taking the drug is now re-examination of insect egg conversion rate. And from negative students randomly selected 162 (respectively in 4 classes), as the inspection group and control group, the former a week on the health common sense class, with a personal hygiene check