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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 96, No. 7, 2001, pp. 965-972
Bioline Code: oc01188
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 96, No. 7, 2001, pp. 965-972

 en Specific Antibody Levels and Antigenic Recognition of Wistar Rats Inoculated with Distinct Isolates of Trypanosoma evansi check for this species in other resources
Adriana O Queiroz; Ana P Legey; Samanta CC Xavier & Ana M Jansen


"Mal de Cadeiras", an enzootic disease caused by Trypanosoma evansi check for this species in other resources , is one of the most important trypanosomiases in the Brazilian Pantanal region. The disease affects mainly horses, which are widely used in extensive cattle production, an activity of greatest economical significance for the region. The parasite also infects sylvan (coatis and capybaras) and domestic (dogs) animals, respectively considered wild and domestic reservoirs of T. evansi. For a better understanding of the interaction of T. evansi with its rodent host, we evaluated the differences in the specific antibody level patterns and in the parasitic peptides recognition patterns of experimentally infected Wistar rats. The rats experimentally infected with T. evansi isolates obtained from coatis, dogs and horses were submitted to indirect immunofluorescence test (IgM e IgG) and Western blotting. The serological titers for IgM and IgG ranged between 1:40 and 1:160. The most recognized polypeptide profiles were in a range of 17 and 74 kDa. Our data suggest that the humoral immune response in Wistar rats is not sufficient for granting an effective control of T. evansi infections.

Trypanosoma evansi, Wistar rats, antigenic recognition, indirect fluorescent antibody test

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