Participants (n = 283) underwent anthropometric measurements (body mass and height), and after a 12 h fasting period, blood was drawn to determine TB, CB, and UCB concentrations and to genotype UGT (UGT1A1 genotype 6/6; 6/7; 7/7) in leukocyte DNA. The gene discussed is UGT1A1; the disease is tuberculosis.