158 DISEASES DUE TO PROTOZOA 



the basin of the Limpopo, German East Africa, British East Africa 

 and Uganda. 



The carrier is Glossina morsitans and the Tabanidas. 



The trypanosome gives rise to : — 



An acute disease in mice, rats, dogs, monkeys and cats. 



A subacute disease in rabbits, guinea-pigs, equines and pigs. 



A chronic disease in cattle, goats, geese and fowls. 



It is fatal to horses, asses and dogs. 



The symptoms are : fever, infiltration of coagulable lymph in the 

 subcutaneous tissues of the neck, abdomen and extremities, rapid 

 destruction of the red cells, extreme emaciation, and often blindness. 



The treatment is by arsenic. 



TRYPANOSOME EQUINUM. 



It causes mal de caderas, a disease of the hind quarters in horses 

 and dogs in South America. 



It is spread by the ingestion of the infected meat of dogs, also by 

 fleas. Some blame the Tabanid^e and Stomoxys. 



It is very fatal to horses. 



The symptoms are : rapid weakness, fever, paralysed hind quarters, 

 staggering gait, stumbles and falls. Albuminuria, h^ematuria, 

 eruption on the neck, shoulders and hind quarters not uncommon. 

 Conjunctivitis and chemosis. There are serous exudations into the 

 serous cavities and the spinal canal. 



A mare will die in two months after the paralysis begins. 



TRYPANOSOME EQUIPERDUM. 



It causes dourine or mal du coit in horses. 



It occurs in Europe, India, North Africa, and North America. 



It is spread by coitus between stallion and mare, not by flies, hence 

 the trypanosome is capable of penetrating a healthy mucous membrane. 



The incubation is eleven to twenty days. 



The symptoms are : oedema of the genitals, which is painless; it is 

 not inflammatory; there is some fever; this lasts one month, when 

 weakness and emaciation begin. 



An eruption comes in about forty to forty-five days, in circular 

 areas, with oedema about the flanks, hind quarters, neck, shoulders 

 and thighs. It is often transient, and lasts about one week in all. 



There is synovial engorgement of the joints and tendon sheaths. 



There is enlargement of the lymphatic glands, particularh^ of the 

 inguinal glands. 



Anaemia and paralysis then set in. The mucosae are pale, and 

 marked emaciation is rapid. There are superficial abscesses, non- 

 healing in character, conjunctivitis, ulcerative keratitis. 



