Probably from 1 to 1.5 per cent. of all pregnant women have tuberculosis in such degree that it can be detected if careful examination is made. Freund found about 12 cases in 1,000. Of these patients, nearly half were in a serious condition. The fact that only about 50 per cent. of the cases discovered were comparatively mild suggests the possibility that a larger number of mild cases could have been discovered if a stricter examination had been made. We have not a sufficiently large statistic from other clinics to justify the statement above made concerning the frequency of the disease, but it is probably true because the ratio given corresponds to the frequency ratio of tuberculosis among adults between 15 and 45 years. This ratio is obtained from the consumption mortality rate and the duration of the disease. According to the United States census of 1900, there are 252
BACON CS. PULMONARY TUBERCULOSIS AS AN OBSTETRICAL COMPLICATION.. JAMA. 1905;XLV(15):1067–1070. doi:10.1001/jama.1905.52510150031002f
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