TNF and infection: In this work to discern whether parasite factors influence outcome of infection towards one of these two forms of ATL, we assessed the production of IFN-γ, TNF-α, IL-5 and IL-10 through the stimulation in vitro of peripheral blood mononuclear cells (PBMC) from DL and CL patients with L. braziliensis antigens isolated from DL and CL patients.