Methods Teach those students how to prevent and cure schistosomiases,who are more than grade 5,randomly taken from three schools for the children of labors from the country.

• 方法随机抽取3所外来民工子弟学校,对5年级以上学生整群抽样,进行血防教育,对血防教育前后学生的防治知识、相关行为和教育需求等作统计分析,评价干预效果。