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Antigen-specific IgA responses in multibacillary (MB) and paucibacillary (PB) leprosy. Levels of IgA antibodies against (A) NDO-HSA, (B) LID-1, and (C) NDO-LID in serum of MB (n = 18) and PB (n = 19) leprosy patients and in non-endemic controls (NEC; n = 20) were measured by ELISA. The cut-off point (dashed line) was established by the ROC curve while the horizontal bars represent median. * = P < 0.05.
