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Trypanosoma cruzi parasitic forms present in human tissues. (Left) Schematic representation of a trypomastigote form of Trypanosoma cruzi. (Reprinted from reference 63 with permission of the publisher.) (Right) Ultrastructure of a T. cruzi amastigote free in the cytoplasm of a muscle cell. N, nucleus; K, kinetoplast; F, flagellum.
