Fourie P B, Gatner E M, Glatthaar E, Kleeberg H H
Tubercle. 1980 Jun;61(2):71-9. doi: 10.1016/0041-3879(80)90013-6.
After 5 years a follow-up prevalence survey was conducted in Transkei on a randomly selected sample of the rural population. The parameters investigated were bacteriological prevalence of tubercle bacilli in sputum, radiological prevalence of chest abnormalities associated with tuberculosis in adults, and hypersensitivity to tuberculin in children. Bacteriological positivity was 2.1% on smear microscopy and 4.3% on culture. Radiological evidence of tuberculosis was demonstrable in 12.5% of subjects, of whom 8.7% were considered active and 3.8% inactive. The mean prevalence of tuberculin positivity according to the Mantoux test was 30.1%. An annual risk of infection of 4% was calculated, showing a continuous decrease of 5% per year on the 7% risk of infection encountered in 1972. Compared with the first survey, a general reduction in prevalence of tuberculosis is evident.
5年后，在特兰斯凯对农村人口的一个随机抽样样本进行了一次随访患病率调查。所调查的参数包括痰液中结核杆菌的细菌学患病率、成人中与结核病相关的胸部异常的放射学患病率以及儿童对结核菌素的超敏反应。涂片显微镜检查的细菌学阳性率为2.1%，培养的阳性率为4.3%。12.5%的受试者有结核病的放射学证据，其中8.7%被认为是活动性的，3.8%是非活动性的。根据曼托试验，结核菌素阳性的平均患病率为30.1%。计算出的年感染风险为4%，表明与1972年遇到的7%的感染风险相比，每年持续下降5%。与第一次调查相比，结核病患病率普遍下降是明显的。
