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  • Title: Suppression of cell-mediated immunity in experimental Chagas' disease.
    Author: Reed SG, Larson CL, Speer CA.
    Journal: Z Parasitenkd; 1977 Jun 03; 52(1):11-7. PubMed ID: 407736.
    Abstract:
    The effect of acute infection with the Tulahuén strain of Trypanosoma cruzi on the cellular immune response in Swiss mice was studied. Mice were immunized with either Freund's complete adjuvant or oxazolone, a skin sensitizing agent, and subsequently skin-tested with either BCG protoplasm or oxazolone to detect delayed hypersensitivity. Depression of the response to these antigens was observed in infected mice during the stage of marked parasitemia. Mice which were responsive to oxazolone before infection lost their ability to respond as the infection progressed. When immunized with live attenuated T. cruzi before infection with virulent organisms, mice developed a greater than normal sensitivity to oxazolone and survived infection. These experiments do not conclude whether immunosuppression due to infection with T. cruzi is directed toward induction or expression of the cell-mediated immune response to the antigens employed.
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