T and B cells in borderline (BB) leprosy.

The response to standard Dharmendra lepromin and the circulating T, B cell numbers in the peripheral blood were quantitated in 15 patients with Borderline (BB) Leprosy. On the basis of lepromin response, the patients fall into three groups (a) negative (b) +/- reaction (c) rarely positive. No significant difference in the numbers of E-rosette and EAC rosette forming cells was observed in the BB patients in comparison to controls.