From our results, serum CXCL11 levels were not as strong of an indicator of treatment response, but CXCL11 induction was better than the other 2 CXCR3 ligands for the diagnosis of TB.13 The in vitro potency and receptor affinity were reported to be highest for CXCL11 among the CXCR3 ligands.25,26 However, 2 subsequent studies evaluating unstimulated blood levels of CXCR3 ligands showed that serum CXCL11 levels were lower with inferior diagnostic performance compared with those of the other 2 CXCR3 ligands.14,15. This evidence concerns the gene CXCR3 and tuberculosis.