In situ expression and distribution of different myeloid markers showed a significant increase of CD68+ (P = 0.0007) and CD163+ (P = 0.005) macrophages as well as CD11b+ (P = 0.0097) and CD11c+ (P = 0.031) cells in HIV-negative TB-infected lymph nodes tissues compared with controls (Figure 3, E–H). Here, CD68 is linked to tuberculosis.