CXCL9 and tuberculosis: It has been reported that multiple chemokines expressed in the TB-PEs, including CXC chemokines such as IFN-γ-inducible protein of 10-kD (IP-10/CXCL10), monokine induced by IFN-γ (MIG/CXCL9), IFN-inducible T-cell alpha chemoattractant (I-TAC/CXCL11), interleukin-8 (IL-8/CXCL8), as well as CC chemokiines such as macrophage inflammatory protein-1 alpha (MIP-1alpha/CCL3), regulated upon activation normal T lymphocyte expressed and secreted (RANTES/CCL5) and monocyte chemotactic protein 1 (MCP-1/CCL2) [13], [14], [15], [16], [17].