212 PARASITOLOGY, 



takes the infested blood cells into its intestinal tract; 

 the piroplasma leaves the red blood cell, passes 

 through a change in which new bodies are formed; 

 these new corpuscles leave the intestines and migrate 

 to the ovary; thus the egg becomes infested. These 

 virulent protozoa are contained in the larva, and 

 after it emerges from the egg it is capable of inocu- 

 lating susceptible cattle. 



Parts Infested. — The red blood cells ; may be found 

 free in the plasma. 



Name of Disease. — Texas fever ; splenic fever ; 

 Spanish fever; tick fever; red water; black water; 

 southern cattle fever; Australian tick fever. 



Condition Produced. — -The liver is congested, bile 

 thick and granular; fat is icteric (jaundice); the 

 spleen is enormously enlarged and contents consist- 

 ency of blackberry jam; kidneys congested; urine 

 port-wine colored; cancellated portion of the bone 

 is black. An animal so affected is unfit for food. 



Symptoms. — The animal has a loss of appetite; 

 unthrifty appearance; rise in temperature accom- 

 panied by an accelerated respiration and pulse. The 

 back is arched; animal stays off to itself; port-wine 

 colored urine, hence the chronic form has been called 

 red water, or bloody murrain. 



A condition produced by some species of the 

 genus Piroplasma is called piroplasmosis. 



Treatment. — In all forms of piroplasmosis of the 

 blood stream the essential treatment would be quinine 

 in full medicinal doses. 



Piroplasma Ovis (Ovis — sheep). 



Distribution. — Found in Montana and other locali- 

 ties in the United States. 



