IL15 and tuberculosis: The TB-antigen stimulated IFN-γ, IP-10, IL-2, MCP-1, IL-1Ra, and IL-15 levels and the unstimulated VEGF, IP-10, IL-12 (p70), IFN-γ, MCP-1, and MIP-1b levels were found to be significantly higher in the TBI group than in the CON group (Additional file 1).