Fig. 5.
Electron photomicrographs of the intracellular localization of V. cholerae in A. castellanii. (a) A. castellanii trophozoite containing intracellular V. cholerae O139 MO10 in the cytoplasm, 3 h after co-cultivation. (b) A. castellanii cyst containing intracellular V. cholerae O139 MO10, 7 days after co-cultivation. (c) A. castellanii trophozoite containing intracellular V. cholerae MO10-T4 in the cytoplasm, 1 day after co-cultivation. (d) A. castellanii cyst containing V. cholerae MO10-T4, 6 days after co-cultivation. (e) A. castellanii trophozoite containing intracellular V. cholerae Bengal-2R in the cytoplasm, 1 day after co-cultivation. (f) A. castellanii cyst containing V. cholerae Bengal-2R, 6 days after co-cultivation. Arrows indicate bacteria. N, nucleus; V, vacuole. Magnification ×3700.