title: [Prevalence of mycobacterial infection in school children of Rio de Janeiro city (author's transl)].
abstract: Skin-test were performed in 226 students, 12 to 14 years old, in a Rio de Janeiro elementary school using PPD-Rt23, PPD-G210 and PPD-B. The differential tuberculin test using these three antigens showed that 24,3% of the children presented a stronger reaction for non-tuberculous mycobacterial tuberculins than to PPD-Rt23, suggesting that infections with such organisms may occur. A high proportion (74,5%) showed the strongest reaction with PPD-G210 and probably this antigen is the most interesting to be used simultaneously with PPD-Rt23. Children with the largest tuberculin reaction to PPD-Rt23 represented 27,4% of the total. This group consists of individuals who have had a tuberculous infection. The third group (48,3%) provided evidence for a heterogeneous sensitization with the tubercle bacillus and at least one atypical mycobacteria.
mesh_terms: D000293:Adolescent; D001938:Brazil; D002648:Child; D003429:Cross Reactions; D005260:Female; D006801:Humans; D006968:Hypersensitivity, Delayed / Q000276:immunology; D008297:Male; D009164:Mycobacterium Infections / Q000453:epidemiology*; D009165:Mycobacterium Infections, Nontuberculous / Q000175:diagnosis / Q000453:epidemiology* / Q000276:immunology; D014374:Tuberculin Test; D014376:Tuberculosis / Q000175:diagnosis / Q000453:epidemiology* / Q000276:immunology
vernacular_title: Estudo da prevalência de infeccões micobacterianas em escolares na cidade do Rio de Janeiro.