IL4 and tuberculosis: For the IL4 -590C/T polymorphism, a higher frequency of the TT genotype (p = 0.0286; OR = 2.800, 95% CI 1.26–6.22) and of the T allele (p = 0.0029; OR = 1.6300, 95% CI 1.12–2.35) was observed in the TB group than in the LTBI group.