Fig. 1. Cytostomes are present during each intraerythrocytic stage. (A-C) Electron micrographs depicting the presence of cytostomes (arrowheads) in ring (A), trophozoite (B) and schizont (C) stage parasites. (D) Electron micrograph of a representative trophozoite stage PE in which three cytostomes (CYT) are visible (CYT 1, CYT 2, CYT 3) within a single thin section. (E) Trophozoite stage PE in which the cytostome is observed interacting with the FV. FV, food vacuole; P, parasite; PPM, parasite plasma membrane; PVM, parasitophorous vacuolar membrane; RBCM, red blood cell membrane. Scale bar: 100 nm.