COGCIDIOSIS. 



2b 



separate away from the cell-wall and form a central round or 

 oval mass (/'). Both adult and encysted stages may be freely 

 detected in the liver, in the white and yellow patches which are 

 characteristic of the disease. Now if we collect numbers of 

 these encysted forms and place them on damp sand in a warm 

 temperature, we shall soon observe by microscopic examination 

 that the central protoplasmic ball splits into two and then four 

 (g and h). This is a kind of segmentation or division, the 

 round bodies being known as " sporoblasts. " These sporoblasts 



I ^ f S 



Fig. 



-CocciDlUM oviFORME OF Rabbit's Liyer. After Balbiani. 



(I, &, c, Young Coccidia in epithelium of liver; d^ e, /, encysted adult Coceidia; 

 17-Z, development of sporoblasts ; m, mature sporoblast, showing t)ie two falciform 

 liodies : n, tlte two spores separate ; 0, a falciform spore — j/, its nucleus. (From Par. 

 Dis. Ani., Neumann.) 



elongate, expand at each end, and are seen to be surrounded 

 by a thin membrane, within which is also seen a granular lump. 

 Each of these " sporoblasts " really contains two spores, the 

 falciform spores (o), described in a typical sporozoon — in fact, 

 the so-called sporoblast is a pseudo-navicella. Just as in the 

 type referred to on the preceding page, so here, each falciform 

 body gives rise to a little flagelloid creature. This form migrates 

 from cell to cell of the animal's liver, encysting and produc- 



