Challenge of Trypanosoma Cruzi chronically infected mice with Trypomastigotes activates the immune system and reduces subpatent parasitemia levels - Marinho, Claudio Romero Farias; Bastos, Karina R. B.; Sardinha, Luiz Roberto; Grisotto, Marcos G.; Lima, Maria Regina D'Império; Alvarez, José Maria (Journal Parasitology,, 2004)