IMPORTANT INFECTIOUS DISEASES 473 
with a fatal termination. There is no help after the symptoms have 
developed. In case man is bitten he should take the Pasteur treat- 
ment, which is a preventive, and it should be taken in a very short 
time after being bitten. After the symptoms begin to show it is too late. 
11. Strangles.—This trouble, commonly called colt dis- 
temper, affects horses, and rarely mules and donkeys. It 
is such an infectious disease that nearly all horses con- 
tract the disease when colts, and usually remain immune 
to future exposures. The cause is a very small organism 
or germ, which enters the system when a healthy colt 
comes in contact with a diseased one, or when fed and 
watered in infected vessels. The seat of trouble is largely 
restricted to the respiratory organs. 
The animal eats little, and does not care to take much exercise. 
A little watery discharge frequently appears from the eyes, and about 
the same time a watery discharge from the nostrils, which soon be- 
comes thicker and yellower in color. Usually the glands be- 
tween the lower jawbones become enlarged and undergo suppuration, 
with a rupture of them and free discharge of pus. When no com- 
plications occur, the disease usually runs its course in two weeks. A 
laxative diet, with something green, if possible, should be given, and 
the colt placed in clean, airy, and comfortable quarters, but not in 
a draft. 
12. Tetanus.—An infectious disease in which the body 
muscles are spasmodically contracted or stiffened. The 
muscles that move the jaw are frequently affected and 
the animal is unable to 
open the mouth. The 
spread of the disease 
does not occur through 
healthy animals coming 
in contact with animals 
having tetanus, but by 
inoculation. 
The germ of tetanus is 
present in the soil, manure 
and dust. It enters the body Note the rigid, tense position of the muscles 
by way of wounds. The 
TETANUS OR LocK JAW 
