CXCL9 and tuberculosis: With regard to differentiating TB-LAP patients from LTBI, I-TAC showed significant results in both all and definite patient groups, while IFN-γ showed only a trend toward significant difference in all TB-LAP patients (p = 0.099), and MIG showed only a trend toward significant difference (p = 0.010) in definite TB-LAP patients.