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Bloodstream forms of Trypanosoma cruzi were found to be destroyed by human lymphoid cells, neutrophils, or eosinophils in the presence of specific antibodies. Nonspecific immunoglobulins present in normal serum did not mediate the cytotoxic reaction. Cells or antibody had no significant lytic effect on the parasite when tested separately and purified, non-activated human adherent cells were inactive whether antibody was present or not.
Accepted for publication May 7, 1979.
* This work was supported in part by research grants from the National Institutes of Health (AI 14848 and CA 25042) and the Michigan Heart Association.
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