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1984年4月,我们对鹤北、沾河林业局15岁以下儿童(未种卡)进行了结核自然感染率调查。2,764名儿童做OT试验,2,712名复查反应(98.7％)。结果:阳性反应426名,感染率为15.70％,低于本省(21.4％),高于全国(8.8％)。黔东南苗、侗族自治州位于云贵高原东部。1978年个别县城小学曾零星做过卡介苗接种,近7年来未开展过接种工作。1979年流调时15岁以下儿童结核自然感染率为4.99％,7岁组为3.26％。1985年4月,我们采用分层整群随机抽样法对4,017名小学一年级儿童做了感染率调查。结果各地感染率介于5.85～24.05％。男女感染率分别为12.39％和15.53％(P>0.05,t=1.04)。6、7、10岁组分别为12.5％、14.1％和20.7％。苗、
In April 1984, we conducted a survey on the natural infection rate of tuberculosis among children under 15 years of age (non-seed cards) in Hebei and Zhanhe Forestry Bureau. 2,764 children did the OT test and 2,712 responded to the test (98.7%). Results: There were 426 positive reactions, the infection rate was 15.70%, lower than the province (21.4%) and higher than the national average (8.8%). Qiandongnan Miao, Dong Autonomous Prefecture is located in the eastern Yunnan-Guizhou Plateau. In 1978, individual county primary schools had sporadic BCG vaccination, and vaccination was not carried out in the past seven years. The natural infection rate of TB in children under 15 years of age was 4.99% in 1979 and 3.26% in the 7-year-old group. In April 1985, we conducted a stratified cluster random sampling method to investigate the prevalence of 4,017 primary school children. Results The infection rates ranged from 5.85% to 24.05%. Male and female infection rates were 12.39% and 15.53% (P> 0.05, t = 1.04). The age groups 6, 7 and 10 were 12.5%, 14.1% and 20.7% respectively. seedling,