SLC11A1 and tuberculosis: Four NRAMP1 polymorphisms [a 4-base-pair rs17235416 indel in the 3′ untranslated region, a 5′(GT)n microsatellite in the 5′ promoter region, an intron 4 rs3731865 SNP and an exon 15 rs17235409 SNP] have been previously associated with susceptibility or resistance to TB among Africans (Bellamy et al., 1998; Velez et al., 2009a).