TLR4 gene expression was increased both in active TB (2.18 ± 2.91 fold change, adjusted p = 0.007) and LTBI (3.54 ± 3.42 fold change, adjusted p = 0.038) groups as compared with that in the NIHS group (0.98 ± 0.42 fold change, Figure 3d). Here, TLR4 is linked to tuberculosis.