COCCIDIA 433 



vermicular body which penetrates gut-epitheUum and reaches 

 peri-intestinal tissues and grows; becoming surrounded by a 

 cyst-membrane, cyst contents break up into a number of sporo- 

 blasts and then into spores, each of which contains a number of 

 sporozoites; when a rat devours infected mites, it becomes in- 

 fected. 



Genus Karyolysus Labbe. Sporoblasts formed in oocysts in gut- 

 epitheUum of mite, vermiform sporokinetes, enter host ova and 

 become mature; when young mites hatch, spores in gut-epithe- 

 lium are cast off and discharged in faeces ; a lizard swallows spores ; 

 liberated sporozoites enter endothelial cells in which schizogony 

 takes place; merozoites enter erythrocytes as gametocytes which 

 when eaten by a mite complete development in its gut. 



K. lacertarum (Danilewsky) (Fig. 195, o). In Lacerta muralis; 

 sexual reproduction in Liponyssiis saurarum; sporokinetes 40-50/x 

 long; spores 20-25jU in diameter. 



References 



Becker, E. R. 1934 Coccidia and coccidiosis. Ames, Iowa. 

 BouGHTON, Ruth B. and J. Volk 1938 Avian hosts of the genus 



Isospora (Coccidiida). Ohio. Jour. Sci., Vol. 38. 

 Christensen, J. F. 1938 Species differentiation in the coccidia 



from the domestic sheep. Jour. Parasit., Vol. 24. 

 DoBELL, C. 1925 The life-history and chromosome cycle of 



Aggregata eherthi. Paras., Vol. 17. 

 Henry Dora P. 1931 Species of Coccidia in chickens and quail 



in California, Uni. Cal. Publ. Zool., Vol. 36. 

 Miller, W.W. 1908 Hepatozoon perniciosum. U. S. Publ. Health 



Service, Hyg. Lab. Bull., No. 46. 

 Levine, N. D. and E. R. Becker 1933 A catalog and host index 



of the species of the coccidian genus Eimeria. Iowa State 



Coll. Jour. Sci., Vol. 8. 

 ScHAUDiNN, F. 1900 Untersuchungen iiber den Generations- 



wechsel bei Coccidien. Zool. Jahrb. Abt. Morph., Vol. 13. 

 Tyzzer, E. E. 1929 Coccidiosis in gallinaceous birds. Amer. Jour. 



Hyg., Vol. 10. 

 Wen YON, C. M. 1926 Protozoology. Vol. 2. London. 



