[HIV infection/AIDS. Strategies for prevention].
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Biomedical subjects
Publications and source records attributed to A C Gerbase.
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Three criteria for the withdrawal of Hansen's disease patients of unknown whereabouts from the active record are presented, based on patients' age, number of years they have been out of control, and probability of their being alive, calculated according to a regional mortality table. In the first criterion, patients who have been lost and who according to their life table have a lower than 50% mathematical probability of being alive were given "statistical discharge." In the second and third criteria, Mitsuda-negative patients who had been lost for more than 20 years and Mitsuda-positive patients who had been lost for more than ten years and who had not been included in the first criterion were given "statistical discharge." During the six years in which the method was used in the state of Rio Grande do Sul, Brazil, 506 patients of unknown whereabouts were withdrawn from the active record, four of whom were found to be alive with the disease in progress. The results that have been achieved suggest an accuracy rate of about 100% for the first criterion of "statistical discharge" and about 98% for the other two criteria.
Some classifications of Leprosy currently in use are reviewed and the difficulties of their application in field work are analysed. While it is recognized the scientific value of these classifications in order to identify precisely the clinical, bacteriological, histological and immunological aspects of the disease, an alternative simplified classification is suggested, to be used in control programmes. In this classification clinical forms that require the same public health action are put together. Thus, clinical forms are reduced to three basic groups. The clinical and laboratory criteria which define each group are presented, as well as the correlation between this simplified classification and the classic one.