As shown in Fig. 3a, L-Arg treated TB mice produced a lower percentage of Gr-1+CD11b+F4/80+ macrophages (P < 0.05, t-test), but a higher percentage of Gr-1+CD11b−F4/80+ macrophages (P < 0.05, t-test) compared to control mice. The gene discussed is ITGAM; the disease is tuberculosis.