Fig. 3From: Effect of isoniazid preventive therapy on immune responses to mycobacterium tuberculosis: an open label randomised, controlled, exploratory studyComparison of the change in M.tb-specific antibody production between enrolment and after 6Â months of follow up in the no IPT or IPT treatment arms. Antibody concentrations were determined in response to TB antigens (PPD, CFP-10 and ESAT-6) in QFN supernatants using an IgG ELISA assay among the household contacts with latent tuberculosis infectionBack to article page