Infection of macrophages with MAP increased iNOS expression (13.09 ± 0.94 vs. 5.11 ± 0.8 in uninflected cells), IL-6 (38.43 ± 1.2 vs. 18.5 ± 1.8 in uninfected cells), and TNF-α (0.54 ± 0.075 vs. 0.27 ± 0.08 in uninflected cells). The gene discussed is TNF; the disease is infection.