"Life history of Coccidium. 1. Sporozoite; 2. Sporozoite entering a cell and becoming a trophozoite; 3-4. Schizont, forming merozoites; 5. Merozoites entering another cell; 6a. Merozoite forming macrogamete; 6b. Merozoite forming microgametes; 7. Free microgamete; 8-9. Fertilisation of macrogamete by microgamete; 10. Zygote within oocyst; 11. Formation of spores within oocyst; 12. Spores forming sporozoites." -Thomson, 1916

Coccidium

"Life history of Coccidium. 1. Sporozoite; 2. Sporozoite entering a cell and becoming a trophozoite;…