title: Efficiency of tuberculin as a tool to determine the prevalence of tuberculosis.
abstract: Among 1937 first grade primary school children followed, the results of tuberculin test, the prevalence rate of TB infection was 4.49% with an estimated annual infection rate of 0.75%. Household contacts of tuberculin positive pupils gave a prevalence rate of infection of 30.6%. As for the efficiency of tuberculin screening test, data of this work showed a positive predictive value of 13.3%. Out of 10 diagnosed tuberculous patients, 4 cases were diagnosed for the first time during this study.
authors.forename: A A
authors.initials: AA
authors.lastname: Sherif
authors.forename: A A
authors.initials: AA
authors.lastname: Hasab
authors.forename: A A
authors.initials: AA
authors.lastname: Mahfouz
authors.forename: M M
authors.initials: MM
authors.lastname: Hassan
authors.forename: A G
authors.initials: AG
authors.lastname: Mohamed
mesh_terms: D002648:Child; D004534:Egypt / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D011237:Predictive Value of Tests; D015995:Prevalence; D012680:Sensitivity and Specificity; D014374:Tuberculin Test; D014376:Tuberculosis / Q000175:diagnosis / Q000453:epidemiology*