[Practical use of surveillance system information to tuberculosis control].

In Japan as a low prevalence country in tuberculosis, national computerized tuberculosis surveillance system in Japan has started since in 1987. The volume of information has much increased in comparison with previous annual reports, and its practical use to tuberculosis control programme is more expected. In this symposium, I presented two analyses, utilizing the information obtained from the surveillance system in Aichi Prefectural Government. 1) Surveillance of chemoprophylaxis 805 children were registered for chemoprophylaxis for seven years from 1980. This comprised of 19.0 percent of the average annual bacillary pulmonary cases. In this study, we chose 553 cases of them who were detected in contact examinations and/or in medical institutions. Their information was sought at health centers. The treatment periods were insufficient in 10 percent, and the infectious sources were detected in 80 percent. 50 percent of them satisfied the criteria for chemoprophylaxis. The effectiveness of chemoprophylaxis was confirmed, though 4 cases developed tuberculosis later. 2) Surveillance of microepidemics 632 so called "danger group" patients of, infants, school students, teachers and medical staffs, were registered during six years from 1981. 71 contact surveys had been made. Survey was made more frequently when the index case was bacillary positive. 3 microepidemics were found in this 6 years. Coordination among health centers were needed in one third of them to make examinations.(ABSTRACT TRUNCATED AT 250 WORDS)