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Scanning electron micrographs of A. castellanii exposed to C. sinensis during encystation. (A) Cysts in the control encystation medium attached together likely by adhesin (arrow); (B) Aggregated cysts exposed to C. sinensis at 3 h; (C) Cyst at 24 h shows loss of cellular integrity and membrane perforation; (D) Progressive destruction of cysts at 72 h post-exposure to C. sinensis. Magnifications: X4,000 (A and C) and X2,000 (B and D). Scale bars = 5 μm (A, C) and 10 μm (B, D).
