FIG. 2.

Comparison of TST and IGA in active tuberculosis patients. Whole blood from nine TST-positive patients with active tuberculosis was analyzed by the indicated IGAs. Data are reported by taking into account the best performer of the two antigenic formulations (peptides versus proteins). Thus, the results for the proteins from Lionex were reported for the Q-TB assay, while those for the peptides from Cellestis were reported in the whole-blood intracellular staining assay. Bars indicate the percentage of positive responses in active tuberculosis patients by the indicated assay. The cutoffs for positive responses are indicated in footnote b of Table 2.