Abstract
Sera from patients with lepromatous and tuberculoid leprosy were examined in immunoblot assays for antibodies to Mycobacterium tuberculosis culture filtrate antigens. Antibodies to 30- and 31-kilodalton proteins were present in 88 and 81%, respectively, of 16 patients with lepromatous disease and absent in 16 patients with tuberculoid disease. Antibodies to a 32-kilodalton protein were found in 12 and 38% of lepromatous and tuberculoid patients, respectively. These reactivities may be useful for distinguishing lepromatous and tuberculoid leprosy.
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