为实施结核病监测,结合每年7岁入学儿童卡介苗复种,进行年感染率调查,与现行卡介苗接种制度一致。以年感染率为疫情监测指标,历年进行。结素试验反应硬结均径以20mm 为自然感染标准。应用折返法求感染率,用对数回归推算年感染率及感染趋势。1977年感染率为4.4%,1988年为0.88%,年递降率为13.6%。 In order to implement tuberculosis surveillance, the annual infection rate survey is conducted in combination with the 7-year-old children receiving BCG vaccination. This is consistent with the current BCG vaccination system. To the annual infection rate as the epidemic monitoring indicators, carried out over the years. Knot test reaction induration average diameter of 20mm for natural infection. The rate of infection was calculated by the Rebound method, and the annual infection rate and infection trend were calculated by logarithmic regression. The infection rate was 4.4% in 1977, 0.88% in 1988 and the annual rate of decline was 13.6%.