Figure 4From: Expression of inducible nitric oxide synthase in macrophages inversely correlates with parasitism of lymphoid tissues in dogs with visceral leishmaniasisAverage and standard error of the concentration (pg/mL) of IFN-γ in the sera of asymptomatic and symptomatic dogs naturally infected with Leishmania (Leishmania) infantum chagasi , as well as control animals from a non-endemic visceral leishmaniasis area. Data analysed by the Mann–Whitney test.Back to article page