11. Within the oocyst, meiosis occurs, yielding the sporozoites . 12. Immature sporozoites break through the oocyst wall into the haemolymph. 13. The sporozoites then migrate to the salivary glands and complete their differentiation. 14. Within the endothelial cells, the sporozoites undergo asexual reproduction becoming schizonts. 15. In the first phase sporocysts containing sporozoites infective to the vertebrate host. 16. The oocyst undergoes meiosis and then mitosis producing numerous sporozoites . 17. The sporozoites may also invade liver parenchyma or tissue macrophages. 18. The sporocysts are bivalved and give rise to multiple sporozoites . 19. This vaccine contained antigens from the blood and sporozoite stage. 20. These stages include sporozoites , which are injected by the insect sexually reproduce.
