Figure 3From: Expression of inducible nitric oxide synthase in macrophages inversely correlates with parasitism of lymphoid tissues in dogs with visceral leishmaniasis Spleen histological sections of asymptomatic (A, C) and symptomatic (B, D) dogs naturally infected with Leishmania (Leishmania) infantum chagasi showing amastigotes (A, B) and iNOS + cells (C, D) stained brown by immunohistochemistry. Back to article page