Tuberculin Conversion

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Abstract
A series of 42 patients with minimal primary pulmonary tuberculosis, characterized by tuberculin skin test conversion, negative roentgenographic studies, and positive bacteriologic cultures for Mycobacterium tuberculosis are presented. The pathogenesis of this entity in the development of pulmonary tuberculosis is elucidated as well as its postulated concurrent significance in the epidemiological control of tuberculosis morbidity. All tuberculin skin test converters represent active, primary pulmonary tuberculosis, which is probably communicable. All such subjects should receive the benefit of chemotherapy. All control programs should include bacteriologic studies of all converters, even those with negative chest roentgenograms, if the program can be considered to be all inclusive.

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