Four infective sporozoites exit through suture.
Sporozoites penetrate epithelial cells, especially along the ileum.
Meronts rupture, releasing free merozoites. Merozoites penetrate new cells and undergo merogony to form additional meronts. I merozoites form Type II meronts, which contain 4 merozoites. Microgametes fertilize macrogametes. Oocysts are passed in the feces.