FIG. 2.

Differential humoral reactivity of PE proteins with sera from group 1 adult TB patients. The recombinant Rv0978c and Rv1818c PE family proteins elicit a strong and differential antibody response in M. tuberculosis-infected patients (diagnosed for pulmonary TB) in group 1 as opposed to healthy controls (HC). However, the antibody responses to Rv1169c (C) and the 19-kDa antigen (D) are not statistically significant (P > 0.5) compared to those to Rv0978c (P = 0.04 [IgG]; P < 0.001 [IgM]) (A) and Rv1818c (P < 0.006 [IgG]; P < 0.0001 [IgM]) (B).