Fig. 2.

Interferon (IFN)-γ, interleukin (IL)-12p40 and IL-10 levels in supernatants of peripheral blood mononuclear cells (PBMCs) from healthy controls and exposed individuals [treated cured visceral leishmaniasis patients (♦) and endemic contacts (○)] stimulated in vitro with whole cell extract (WE) of Leishmania donovani promastigotes. Each data point represents one individual; median is indicated by line. Values are given as concentration in pg/ml; *IFN-γ levels above the scale. P indicates level of significance. Statistical analysis was performed by Mann–Whitney U-test; n = number of individuals. IL-4 levels were not detectable.