This finding is comparable to that of the previously mentioned South African study that reported an association between the Gc2 genotype and TB status among Asians.25 Furthermore, a recent study in China exploring vitamin D pathway gene polymorphisms found that the DBP Gc2 genotype was associated with progression to pulmonary TB.32 Moreover, in our study, the Gc1S genotype was detected in the LTBI group. The gene discussed is DBP; the disease is tuberculosis.