HAEMOSPORIDIA 



87 



Fig. 75. A diagram of the life cycle of Plasmodium vivax. From Borradaile. 

 1-7, Schizogony (Merogony), asexual reproduction which takes place in 

 man, 8-13, Gamogony and syngamy, which take place in the stomach of a 

 mosquito. 14-20, Sporogony by the zygote (sporont), which takes place in 

 the body cavity of the mosquito, i, Infection of a red corpuscle. 2, Signet- 

 ring stage. 3, Amoeboid stage. 4, Full-grown schizont preparing to divide. 

 5, Multinucleate stage. 6, Rosette stage, corpuscle breaking up. 7, Free 

 schizozoites. 8, Infection of red corpuscles by young gamonts. 9, Full- 

 grown gamonts free in the mosquito's stomach. 10, 11, Formation of gametes. 

 12, Conjugation. 13, Zygote in the ookinete condition. 14, Invasion by zygote 

 of endoderm cell of mosquito. 15, Encystment. 16, Sporoblasts formed by 

 division of zygote (sporont). 17, 18, Formation of sporozoites. 19, Invasion 

 by latter of salivary gland. 20, Sporozoites injected into blood of a man. 



