Abstract
A longitudinal study was made in a group of indeterminate hanseniasis patients; immunological tests (Mitsuda's reaction and E rosettes formation) and clinical observations were performed in 1973 and in 10977 respectively. A significative difference was observed in the E rosettes formation between "lepromin" positive and "lepromin" negative patients (p < 0,001) in 1973; this difference increased (p < 0,01) in 1977. The immune response was related with the evolution to the polar types of the disease, depending or not on specific treatment. Patients presenting normal values of E rosettes in 1973 showed reversal of the Mitsuda reaction suggesting that this test could be used for prognosis.
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