DISEASES OF THE HOG. 83 
but they are sometimes found in the colon and 
have been seenin the stomach;onthis account they 
have been called the maw worm. They are usually 
about half an inch long and white in color; they 
multiply very rapidly; their eggs are very small 
and are often deposited on the grass and may be 
washed into the streams or ponds of water and 
in this way enter the stomach and bowels. They 
are found in all the higher animals. 
Symptoms: They usually cause itching at the 
root of the tail or by reflex action cause derange- 
ment of other parts of the body. Though produc- 
tive of great annoyance and even suffering, they 
do not usually injure the health of the animal. 
Treatment: Clean out the rectum by injections 
of warm water. Infuse two ounces of quassia chips 
in a pint of boiling water and when cool inject it 
into the rectum; repeat in a week if necessary. A 
brisk purge will often wash out a number of them. 
TRECOCEPHALUS DISPAR (LONG THREAD WORM.) 
This worm is found most frequently in some part 
of the colon and cecum, but sometimes in the small 
intestines, either loose or with its anterior capil- 
lary portion inserted into the mucous membrane. 
It is often observed in great numbers in animals 
that have died from some acute disease. I have 
found numbers of these worms partially buried in 
the mucous membrane, but they did not seem to 
have caused much disturbance. They are about 
half an inch to one inch and a half long and about 
as thick as a common thread, and are very active 
