IMPORTANT INFECTIOUS DISEASES 471 
8. Glanders.—A contagious disease peculiar to the 
horse, ass and mule and may be communicated to human 
beings. The specific organism causing glanders is known 
as bacillus malleus. A discharge from the nose and ulcers 
in the partition dividing the nasal 
cavities are common external 
manifestations of the disease. A 
peculiarity of glanders seems to be 
a tendency for the symptoms to ap- 
pear on the left side. Well-marked 
cases of glanders are not. difficult 
of diagnosis; in cases of doubt a 
test, known as the mallein test, may 
be resorted to. 
Farcy Form OF GLANDERS Farcy is akin to glanders, presenting 
different symptoms in way of farcy “buds” 
or ulcers on the skin. In the acute form, the disease develops rapidly 
and death occurs in a few weeks. In the chronic form, an animal 
may go for months without the disease being suspected; yet such an 
animal is a source of danger to other horses and to its attendant. 
Glanderous horses should be killed as soon as the disease is diag- 
nosed, 
9. Hog cholera—This is the most disastrous and 
prevalent disease among hogs. It is due to a germ and 
is extremely contagious. The germ is so small as to be 
invisible to the highest available powers of the best 
microscopes. 
The hog coming down 
with cholera is usually 
sluggish at first, lying 
around in the shade and 
refusing feed. The hair CuHronic Hoc CHOLERA, SHOWING ULCERS IN 
may become rough. The PORGE TSORSHINE 
eyes early show symptoms of inflammation, with a sticky 
discharge. There is usually a suppressed cough. The 
gait may become irregular and uncertain, especially with 
