PARASITOLOGY. 201 
Symptoms.—The period of incubation is about five 
days; the temperature may reach 106 degrees Fah. 
Swelling appears in various parts of the body, asthe 
chest, abdomen or head; there is a loss of appetite, 
anemia and gradual emaciation. 
TRYPANOSOMA EQUIPERDUM (Equus—horse). 
Distributton.—America and Europe. 
Description.—The general appearance and method 
of cell division does not differ from the description 
given in the two preceding species; the distinction 
between the species is largely by the symptoms and 
lesions produced. The protozoon measures about 
twenty microns long, one and one-half to two microns 
broad; it is atrifle shorter than the Trypanosoma 
Brucii. 
Life Cycle.—Its mode of multiplication is the same 
as in the preceding species ; the method of inocula- 
tion is by coition; the diseased genital organ con- 
veyes the protozoon; the Trypanosoma is found in 
the blood and also in the serum from the oedematous 
and ulcerous parts: 
Animals Infested —The horse, ass and dog. 
Parts Infested.—Primarily genital organs; later 
other parts. 
Name of Disease.—Maladie du coit; dourine; 
equine syphilis. 
Symptoms.—In the mare oedematus swellings ap- 
pear in the vulvar region, which develop in eight to 
ten days after coition; in the horse, in the sheath, 
scrotum and penis; the skin over these organs may 
show eruptions, in the form of vesicles; later, after 
the vesicles have ruptured, white spots appear. 
