[Immunological aspects of infection of 6 inbred strains of mice by 3 different strains of Trypanosoma cruzi].
We evaluated humoral and cellular immune responses in 6 inbred mouse strains (BALB/c, B-10, C3H, A/J, AKR and DBA) infected with 3 Trypanosoma cruzi strains (Peruvian, 21 SF and Colombian), which are the standards for the 3 strains Types of Andrade's classification. Negative delayed-type hipersensitivity reactions to parasite antigens were evidence of suppressed cell-mediated immunity. An early drop of IgG1 and rise of IgM levels were observed in almost all mouse strains infected by any T. cruzi strain. Elevation of IgG2a and/or IgG2b levels was higher in resistant mouse strains. Anti-T. cruzi antibody levels (Indirect immunofluorescence and ELISA) did not correlate with survival. Despite some differences among mouse strains there was a definition of an overall pattern of host response and the maintenance of biological standards which characterize the basic types of T. cruzi strains.
D000818:Animals; D000917:Antibody Formation; D000953:Antigens, Protozoan / Q000276:immunology*; D014355:Chagas Disease / Q000276:immunology*; D005260:Female; D007111:Immunity, Cellular; D007074:Immunoglobulin G / Q000032:analysis; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D014349:Trypanosoma cruzi / Q000276:immunology*
D000953:Antigens, Protozoan; D007074:Immunoglobulin G
Aspectos imunológicos da infecção de seis linhagens isogenicas de camundongos por tres diferentes cepas do Trypanosoma cruzi.