[Groups with the risk of tuberculosis].

A specially developed screening was used to examine 652 workers of an assembly shop of a watch plant whose work is characterized by their being in a constrained position for hours which leads of general inactivity and hypoventilation. Disturbances of external respiratory function were found in 180 (27.6%) subjects, which is associated with their working conditions rather than with smoking. These subjects deserve special care since the pre-clinical obstructive bronchial changes can be the precursors of broncho-pulmonary diseases and later of tuberculosis.