Moreover, the UGT1A1*28 and UGT1A1*6 (rs4148323) explain 12.7% of the total variation of TB levels, and UGT1A1 is the only major gene that control total bilirubin variance in different populations (Johnson et al., 2009; Dai et al., 2013). Here, UGT1A1 is linked to tuberculosis.