IL6 and tuberculosis: The comparison of IL6 -174G/C genotypes between the evaluated groups showed that there was no significant difference in genotypic and allelic frequencies between the TB and LTBI groups (p > 0.05), but when compared to the control group, the TB group had a higher frequency of the GG genotype (p = 0.0021; OR = 4.3955, 95% CI 1.46–13.22) and G allele (p = 0.0003; OR = 2.1128, 95% CI 1.41–3.14).