長期に亘る農村結核集団検診より見た有所見者に就て

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Periodic mass examinations to detect tuberculosis had been conducted every year during the period from 1947 to 1956 at the town of Goi in Chiba Prefecture, which has a population of about 12,000. By studying persons who were diagnosed as having tuberculosis, investigations were performed on the following subjects : 00 The trend of transition of the disease from year to year; (2) The relationship of the acquisition of sensitivity to tuberculin and the onset of the disease, with special reference to the onset of the disease in persons who had positive tuberculin tests at the time of initial examinations ; and (3) The course of the disease, especially of those who had not received any treatment during the period of observations. The results of the investigations are summarized as follows ; (1) The ratio of the persons examined to the whole population ranged from 27.6 per cent to 64.8 per cent. The ratio of the persons having positive tuberculin tests to all the persons examined was 42.0 per cent in the first year of examinations, while it was 73.2 per cent in the last year. Persons inoculated with BCG vaccine because of having negative or doubtful positive tuberculin tests represented on an average 83.6 per cent of those who were examined every year. (2) The presence of tuberculosis was determined in 2.9 per cent of persons having examinations in the first year and in 5.6 per cent in the last year. A follow-up study of patients with tuberculosis showed that those with primary tuberculosis and infiltrative tuberculosis tended to decrease in number, while those with indurative tuberculosis tended to increase in number. (3) The persons who were diagnosed as having tuberculosis during the whole period of examinations were 631 in number, representing 5.8 per cent of a total of 10,764 persons examined during that period. Of these 621 persons, 213 persons (2.0 per cent) had active tuberculosis. There were larger percentages of persons with both active and arrested tuberculosis in middleaged and aged groups than in any other groups. (4) Observations had been made of the persons with tuberculosis for from 1 to 9 years who had received no treatment during that period. It was revealed that in patients with primary tuberculosis, about 80 per cent manifested improvement; in patients with infiltrative and mixed type tuberculosis, about 30 per cent and 60 per cent, respectively, showed exacerbation; and in patients with productive-fibrotic tuberculosis, about 95 per cent remained unchanged. (5) Of 1,673 persons who had positive tuberculin tests at the time of initial examinations and who had been followed up for relatively long period, i. e. for from 5 to 9 years, 321 persons had tuberculosis. Retroactive examinations of screen photographs (35 mm films) of 220 persons whose diseases were detected after the second year of examination showed that 218 persons had had tuberculosis at the time of initial examinations and that only 2 persons (0.12 per cent) had been free from tuberculosis at the time of initial examinations and might, therefore, have developed it after the second year of examinations. (6) Abnormal roentgenographic shadows of non-tuberculous origin were seen witn 39 out of a total of 10,764 persons having mass examinations. These persons were divided into the following groups according to the results of clinical diagnosis : 14 with bronchiectasis, 7 with the so-called transitory infiltration, 4 with atypical pneumonia, 5 with thickenning of the pleura, 5 with benign tumor, 2 with lung cancer, 1 with pulmonary bulla and 1 with lung abscess.
千葉大学の論文
1958-07-28

長期に亘る農村結核集団検診より見た有所見者に就て

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