IFNG and tuberculosis: Given the essential role of IFN-γ to control mycobacterial replication and development of cellular immune response (Flesch and Kaufmann, 1987; Serbina et al., 2001; Salgame, 2005), our case-control study focused on determining whether rs2430561 SNP (+874 A/T) is associated with susceptibility to tuberculosis in Argentinean population.