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IgA responses in patient serum samples from Instituto Nacional de Saúde, Mozambique. End point titres (EPT) (defined as 2-fold absorbance value of background samples) of IgA in serum against Acr (A) and MPT64 (B) were determined by ELISA with error bars indicating SEM. ****p ≤ 0.0001, one-way ANOVA with Tukey’s correction; n = 21 (TB patients), 17 (LTBI), and 19 (BCG vaccinated). Experiment performed once.
