202 PARASITOLOGY. 



The inguinal lymph glands which receive the lymph 

 from these parts become swollen ; later, fibrous de- 

 generation may take place both in these glands and 

 the testicles ; the testicles may contain cavities of 

 caseous pus; there may develop ulcerous patches on 

 the penis, sheath and vulva. In later stages the 

 nerve tissue, kidneys, lymph glands and other or- 

 gans become infested. 



Trypanosoma Equinum. 



Distribution. — Found in Brazil, Paraguay, Bolivia 

 and Argentine Republic. 



Description. — This protozoon has the same general 

 appearance as the trypanosoma Brucii, and multiplies 

 in like manner. It measures from twenty-two to 

 twenty-four microns long and about one and one-half 

 microns broad. 



Life Cycle. — It passes through the same changes 

 as the preceding species. The animals probably be- 

 come inoculated by blood-sucking flies. 



Aniniah Infested. — The horse and, by experimental 

 inoculation, ox, sheep, pig and dog. 



Part Infested.— ThQ blood. 



Disease Produced. — Mai de caderas ; disease of 

 hind quarters; flagellosis of equidae. 



Symptoms. — High elevations of temperature; the 

 animal becomes weak and sluggish. The weakness 

 is greatest in the hind quarters. Later he sways 

 from side to side ; scarcely able to move ; gradual 

 emaciation ; down, unable to rise ; death. 



Trypanosoma Lewisi (Lewis) 

 Distribution. — Found in Cuba and other countries. 

 Description. — It somewhat resembles the other 



