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为了准确掌握入校新生肺结核患病情况，我们于1991年9月对定西城区4所中学、3所小学新入学学生（小学一年级、初中一年级）及3所幼儿园部分幼儿进行了一次肺结核病的调查．现将结果报道如下：1调查方法用1：2000的旧结核菌素（OT）0．1毫升于左前臂皮内注射，48～72小时观察试
In order to accurately understand the prevalence of tuberculosis among new students admitted to school, we conducted a survey on tuberculosis among four secondary schools in Dingxi District, three new-entry primary school students (first grade of primary school, first grade of junior high school) and three kindergartens in September 1991. . The results are reported below: 1 survey method with 1: 2000 of the old tuberculin (OT) 0.1 ml intradermal injection of the left forearm, 48 to 72 hours of observation test