Specificity of the serology test based on the ELISA using the PGL-Tb1 or the ESAT-6/CFP10 antigens and their cumulative results in the different groups of individuals classified as low risk of TB infection.

Footnotes: n/N = number of negative tests/number of tested sera in each group; * Cut-off value for PGL-Tb1: OD = 0.130; ** Cut-off value for ESAT-6/CFP10: OD = 0.100.脚注：n/N 为每组的阴性检测数/受检血清数；* PGL-Tb1 的临界值：光密度（Optical Density，OD）= 0.130；** ESAT-6/CFP10 的临界值：光密度（OD）= 0.100。