Fig. 3.

(a) Antibody levels (mean OD ± standard error of the mean) against Mycobacterium tuberculosis membrane antigens in low responders (LR) were significantly lower than high responders (HR). (b) Immunoblotting of membrane antigens with (i) monoclonal antibody ML09 (lane 1) shows presence of lipoarabinomannan and (ii) donor sera (lanes 2–6, HR; 7–10, LR) shows antigens which were recognized commonly by most sera (result with one LR serum is not available). The strip (MR) containing electroblotted molecular mass markers (kDa) was stained with amido black.