Chapter 9 



These genera belong to the suborder 

 Adeleorina, which is differentiated from 

 the Eimeriorina and Haemospororina by 

 the fact that the macrogamete and micro- 

 gametocyte are associated in syzygy 

 (i.e. , they lie up against each other) dur- 

 ing development. Correlated with this is 

 the fact that the microgametocytes pro- 

 duce very few microgametes. The zygote 

 may or may not be motile, and the sporo- 

 zoites are enclosed in an envelope. 



The great majority of the Adeleorina 

 are parasites of lower vertebrates and in- 

 vertebrates, but a few occur in domestic 

 and laboratory animals. 



KLOSSIBUA 



Am 



HEPATOZOOU 



FAMILY KLOSSIELLIDAE 



In this family, the zygote is not mo- 

 tile. A typical oocyst is not formed, but 

 a number of sporocysts each containing 

 many sporozoites develop within a mem- 

 brane which is perhaps laid down by the 

 host cell. Each microgametocyte forms 

 2 to 4 non-flagellated microgametes. The 

 life cycle involves a single host, game- 

 togony and schizogony occurring in differ- 

 ent locations. There is a single genus, 

 Klossiella. 



Genus Ki.OSS\mi\ Smith and 

 Johnson, 190:2 



This genus has the characters of the 

 family. 



Infection takes place by ingestion of 

 sporulated sporocysts, and the sporozoites 

 pass into the blood stream and enter the 

 endothelial cells of the capillaries and 

 arterioles of the kidneys, lungs, spleen 

 and other organs. Here they turn into 

 schizonts, and these then produce mero- 

 zoites. There are probably several 

 asexual generations. 



Eventually some merozoites enter the 

 epithelial cells of the convoluted tubules 



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