Figure 3.

NO release by L. infantum-infected macrophages from asymptomatic (left) and symptomatic (right) dogs at four and eight months after diagnosis of Leishmania infection. A, macrophages without lymphocytes (4 months); B, macrophages incubated with autologous lymphocytes (4 months); C, macrophages without lymphocytes (8 months); D, macrophages with autologous lymphocytes (8 months). Results are expressed as means ± SE.