The oocyst nucleus divides repeatedly to form large number of daughter nuclei. At the same time, the cytoplasm develops large vacuoles and forms numerous cytoplasmic masses. These cytoplasmic masses then elongate and a daughter nuclei migrates into each mass. The resulting sickle-shaped bodies are known as sporozoites. This phase of asexual multiplication is known as sporogony and is completed in about 10–21 days. The oocyst then bursts and sporozoites are released into the body cavity of mosquito. Sporozoites eventually reach the salivary glands of mosquito via its hemolymph. The mosquito now becomes infectious. Salivary glands of a single infected mosquito may contain as many as 200,000 sporozoites.