PubMed · 1979 · 25 citations · 0 references
Public HealthInfectious DiseasesMicrobiologyInfectious Disease EpidemiologyMedical MicrobiologyPediatric Infectious DiseasesPediatric TuberculosisPulmonary TuberculosisTuberculosis DiagnosisTuberculosis Diagnostic TestingTuberculosis EpidemiologyTuberculosis In ChildrenActive Pulmonary TuberculosisMantoux TestMicrobiological ConfirmationMiliary TuberculosisMycobacterium Tuberculosis InfectionStratified Random SamplingStratified SamplingTuberculosis Prevalence
The results of a prevalence survey undertaken during 1974 are presented. A stratified 3-stage sampling technique was used to select 3 789 people from 10 randomly chosen sites in KwaZulu. One Heaf test and 2 Mantoux tests were performed on each of 1 769 children under 18 years of age, of whom 28,7% were found to have BCG scars. Of the radiographs taken of persons 15 years of age and older, 893 were found to be negative, 25 (2,7%) disclosed active tuberculosis (TB) and 3 (0,3%) miliary TB. Of the 1 136 sputum specimens collected and examined by fluorescence microscopy, 15 (1,3%) were found to be positive and 9 of them were confirmed by culture. Culture of 1 149 specimens yielded 9 (0,8%) isolations of Mycobacterium tuberculosis and 17 strains of other mycobacteria. The annual rate of infection was calculated at 1,4% by applying Styblo's epidemiological model, and a downward trend was indicated. A follow-up survey after 5 years is needed to confirm this trend.