Fig. 1: trypomastigotes found in thin blood smears from naturally infected squirrel monkeys from Balbina and Samuel: a: Trypanosoma minasense; b: T. saimirii-like; and c: a red blood cell from Saimiri sciureus for comparison. Fig. 2: T. minasense found in thin blood smears from naturally infected marmosets, Callithrix penicillata, from Felixlândia, Minas Gerais. A marmoset red blood cell is show for comparison.