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为了解我地区城市中学生蛔虫感染情况，探求防治方法，降低感染率，我们于1991年12月对聊城三中学生开展了抽样调查；结果如下：1调查对象与方法1．1调查对象：初中一年级7个班，高中一年级8个班，男女学生共628名。1．2检验方法：采集新鲜大便．按改良式加藤定量法的要求和操
In order to understand the situation of secondary urinary tract infection of middle school students in cities of our region and explore ways of prevention and treatment to reduce the infection rate, we conducted a sample survey of three middle school students in Liaocheng in December 1991; the results are as follows: 1. Subjects and Methods 1.1. 7 classes, 8 classes in the first year of high school, a total of 628 male and female students. 1.2 test methods: collecting fresh stool. According to the modified Kato quantitative requirements and exercises