Three hundred and eighty new cases of pulmonary tuberculosis were examined and the characteristics of a tuberculous process studied in different social groups (industrial and office workers, unemployed) in relation to methods of detection of the disease: on referrals or prophylactic examinations. There was a considerable reduction in the proportion of patients whose disease was detected on prophylactic examinations, and in the families of patients with tuberculosis. The tuberculous process detected on referrals was characterized by its higher prevalence and a qualitatively more severe form (caseous pneumonia, fibrinous-cavernous, and cavernous processes). A decay phase and bacterial isolation were more frequently noted.
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