IFNG and Chagas disease: In this context, we detected IFNγ in the serum of monkey #95 (150 pg/mL) and TNF in the serum of monkey #103 (28 pg/mL) and high IFNγ and TNF levels in PMA-stimulated peripheral blood cells of monkeys #103 and #95, but not in noninfected controls or infected monkeys with the indeterminate form of Chagas disease (our unpublished data).