Abstract
Summary To obtain information about the tuberculin sensitivity in miners and in order to find outwhether progressive massive fibrosis (P.M.F.) may be caused by a tuberculous infection, the tuberculin sensitivity in Dutch miners was studied by means of the Mantoux-test. The preliminary results show a well-marked correlation between tuberculin sensitivityand age, but no correlation with category of pneumoconiosis. There did not appear to be any difference in sensitivity between miners having P.M.F.and men of the same age who had never worked underground.
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