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- W2070291892 abstract "Groups of rats were immunosuppressed with antithymocyte serum (ATS) and infected with Trypanosoma lewisi. Immunodiffusion studies were performed which demonstrated that trypanosome exoantigens, present in the plasma of these animals, were precipitated by antibodies in the sera of rats undergoing a typical primary T. lewisi infection; extracts of trypanosomes which had been collected from ATS-treated rats contained antigens which also were precipitated by antibodies in these sera. These precipitating antibodies could not be detected using either the plasma of untreated infected rats or extracts of trypanosomes which had been collected from untreated rats. With the exoantigens, precipitating antibodies were detected in serum samples collected from rats 14 to 250 days after infection. With the extract, precipitating antibodies were found as early as 5 days after infection and could be detected as late as 90 days after infection. Antigens of trypanosome extracts partially blocked the precipitin reactions between antisera and exoantigens, suggesting the presence of common antigens in the two preparations. Intact trypanosomes were serologically more reactive when collected from immunosuppressed rats. Trypanosomes collected from ATS-treated rats were agglutinated by antisera at titers fourfold higher than trypanosomes collected from untreated hosts. Absorption with exoantigens from immunosuppressed infected rats blocked trypanosome agglutination, indicating that these antigens are of cell surface origin. The experiments suggest that a likely result of immunosuppressing the host is a trypanosome antigen preparation that is a more reactive serodiagnostic reagent." @default.
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- W2070291892 date "1978-02-01" @default.
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- W2070291892 title "Trypanosoma lewisi: Effects of immunosuppression on the serological reactivities of exoantigens and cellular antigens of bloodstream parasites" @default.
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- W2070291892 doi "https://doi.org/10.1016/0014-4894(78)90080-2" @default.
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