HELEN A. DICKIE, M.D.; ELIZABETH A. CLARK, M. D.
In the last few years the problem of the marked variation in the frequency of pulmonary calcifications as observed in chest roentgenograms has been studied by several groups.2, 3, 4, 5, 6, 7, 9 The highest incidence of pulmonary calcifications has been found in the central eastern half of the United States. These areas were not closely correlated with the areas of highest mortality from tuberculosis. Because a number of reports had demonstrated that a large number of these individuals had negative tuberculin reactions, a search for a non-tuberculous etiology was started. Smith1 pointed out that the area of high
DICKIE HA, CLARK EA. HISTOPLASMIN AND TUBERCULIN SENSITIVITY IN RELATION TO PULMONARY CALCIFICATIONS AMONG UNIVERSITY OF WISCONSIN STUDENTS1. Ann Intern Med. 1948;28:1087–1093. doi: 10.7326/0003-4819-28-6-1087
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Published: Ann Intern Med. 1948;28(6):1087-1093.
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