title: The significance of the tuberculosis infection risk and its application in Pretoria.
abstract: The value of the infection risk index for the determination of the TB situation and for the planning and evaluation of specific control measures is discussed. From tuberculin studies performed on schoolchildren in Pretoria since 1972, the annual risk of contracting a TB infection or of reinfection has been determined for all races in Pretoria; it is 0,05% for Whites, 0,53% for Coloureds, 0,68% for Asians, and 0,64% and 1,05% for Blacks in Atteridgeville and Mamelodi respectively. A downward trend of the risk could be shown for all population groups.
mesh_terms: D005006:Ethnicity; D006305:Health Status Indicators; D006306:Health Surveys; D006801:Humans; D012306:Risk; D013019:South Africa; D014374:Tuberculin Test; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology* / Q000517:prevention & control