428 



SPECIFIC MICRO-ORGANISMS 



provided with two flagella. The female cells, macrogametocytes, 

 enlarge slowly and produce numerous yolk-like granules in their 



D 



Fig. 186. — Cyclospora caryolytica. A, Female cell (agamete) within the host 

 nucleus. B and C, Multiple division. D, A free young female agamete. {From 

 Dofiein after Schaudinn.) 



cytoplasm. The nucleus undergoes two reduction (maturation) 



divisions, and one daughter nucleus remains while the others 



A B C D 



E P G H 



Fig. 187. — Cyclospora caryolytica. >1 , Fertilization. B, Fertilized cell. C, Fer- 

 tilized cell (oocyst) with cyst wall. D, E, F and G, Division of the cyst contents to 

 form two spores, each containing two sporozoits. H, Escape of the sporozoits. 

 {From Doflein after Schaudinn.) 



disintegrate. Several microgametes penetrate the matured macro- 

 gamete and one of them unites with the nucleus. A cyst wall 



