Immunological features analysis revealed that the TB-DM patients had higher levels of TNF-α [pg/ml; 8.56 (7.08–13.35) vs. 7.64 (6.38–10.14) p = 0.033] and IL-8 [pg/ml; 25.85 (11.63–58.40) vs. 17.56 (6.44–39.08) p = 0.003] but lower CD8+ T lymphocyte count [cells/mm3; 334.02 (249.35–420.71) VS 380.95 (291.73–471.25) p = 0.038]. This evidence concerns the gene CD8A and tuberculosis.