title: Action of Trypanosoma rangeli in infections with virulent Trypanosoma cruzi populations.
abstract: In experimental murine infections with Trypanosoma rangeli it has been observed development immune response to Trypanosoma cruzi. The aim of the present work was to analyze the result of antigenic stimuli and the protective effect with T. rangeli in T. cruzi infections. Mice groups immunized with metacyclic trypomastigotes of T. rangeli (Choach -2V strain), derived from haemolymph and salivary gland and reinfected with T. cruzi virulent populations (Tulahuen strain, SA strain and Dm28c clone) from infected in vitro cells, showed decrease severity of disease outcomes, low parasitemia levels and 100% survival of all mice immunized, in comparison with groups infected only with T. cruzi populations, which demonstrated tissue affection, high parasitemia levels and the death of all animals. The above mentioned data contribute to understand the biological behaviour of T. cruzi and T. rangeli and their interaction with vertebrate host.
authors.affiliation: Departamento de Biología, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, Colombia. mariapalau99@yahoo.com
authors.forename: M T
authors.initials: MT
authors.lastname: Paláu
authors.forename: A J
authors.initials: AJ
authors.lastname: Mejía
authors.forename: U
authors.initials: U
authors.lastname: Vergara
authors.forename: C A
authors.initials: CA
authors.lastname: Zúñiga
mesh_terms: D000818:Animals; D014355:Chagas Disease / Q000276:immunology* / Q000473:pathology; D004195:Disease Models, Animal; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D018512:Parasitemia / Q000276:immunology*; D016019:Survival Analysis; D014345:Trypanosoma / Q000276:immunology*; D014349:Trypanosoma cruzi / Q000276:immunology / Q000472:pathogenicity