CCL19 and tuberculosis: The gene expression levels of BLR-1, MARCO, CCL-19, MMP-9, LTF, Bcl-2, and FCγR1A were statistically higher in TB patients than contacts (p < 0.05), whereas the expression levels of IL4δ2 and IL7R were statistically higher in healthy contacts than TB cases (p < 0.05) (Figure 1).