PARASITOLOGY. 215 



of the cell, opposite each other; now begins the con- 

 striction of the protoplasm; finally only a film holds 

 the two newly formed corpuscles together. These 

 corpuscles are at first pear-shaped; later the nucleus 

 passes to the center and the corpuscles become round. 

 This process goes on till as many as sixteen corpuscles 

 may be formed. The great distention of the cell 

 caused by the corpuscles causes it to rupture. These 

 newly formed corpuscles possess amoeboid movement 

 and invade new cells, where they develop to full size. 



Animal Infested. — The dog. 



Part Infested. — The red blood cell. 



A^ame of Disease. — Canine piroplasmosis ; malig- 

 nant malarial jaundice. 



Condition Produced. — The spleen is two or three 

 times its normal size, black and soft. The liver is 

 congested; the bile thick and granular; the kidneys 

 are congested and friable; the urine is port-wine col- 

 ored; medulla of the bone is congested; the fat is 

 yellow. 



Symptoms. — Loss of appetite; high elevation of 

 temperature ; icteric visible mucous membranes ; great 

 prostration and finally death. 



PiROPLASMA Eoui (Equus — horsc). 



Distribution. — Africa, China, Russia, and Philip- 

 pines. 



Description. — The parasite is crescent-shaped and 

 takes staining deeply in its center. It varies from 

 one-half to two microns in length. 



Animal Infested. — The horse. 



