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本文提出一种在BCG接种地区调查感染率的调查模式,即以一定地区的小学入学新生为对象,足期进行感染率调查。此次调查获得当地1984年7岁小学生年感染率0.73％,每年以5.5％的速度递降。该调查模式的优点是:(1)固定地区和年龄,每年皆以7岁学生为对象,消除年龄对年感染率的影响;(2)小学入学新生便于实施调查;(3)可与儿童卡介苗复种结合进行,并对新生儿初种效果考核。通过对同一地区、同一对象卡介苗接种前后两次结素试验结果,证明该地区以20mm为自然感染标准为宜。为在卡介苗接种地区应用折返法调查感染率提供依据。
This paper presents a survey of BCG vaccination in the investigation of the prevalence of the survey model, that is, a certain area of primary enrollment for the object, the full duration of the infection rate survey. The survey received a local annual infection rate of 0.73% for primary school students aged 7 years in 1984, declining by 5.5% annually. The advantages of the survey model are as follows: (1) The fixed area and the age are targeted at 7-year-old students every year to eliminate the influence of age on the annual infection rate; (2) The primary freshmen are encouraged to conduct the survey; (3) Multiple seed combination, and neonatal effect test. Through the same region, the same object BCG vaccination twice before and after the results of the test results show that the region to 20mm for natural infection is appropriate. In order to provide a basis for applying retropression method to investigate the infection rate in BCG vaccination area.