84 VETERINARY PARASITOLOGY 
worms present. If they are but few in number, the 
symptoms may be nil. If present in large numbers, 
there is anorexia and constipation, with a varying 
degree of colic, signs of irritation, such as rubbing on 
the ground or biting at the hind-quarters, together 
with epileptiform convulsions, spasms, and twitching. 
These symptoms are accompanied by progressive 
emaciation. 
Post-mortem Appearances.—When badly infested, the 
piece of intestine, when grasped in the hand, feels as 
though it were filled with a number of large shot, 
while small centres of suppuration may frequently be 
seen on looking through the serous surface. These 
have the head of the worm in the centre. The 
remainder of the mucous membrane may present the 
usual appearance of catarrhal inflammation. Ulcers are 
common, and they may reach, or even perforate, the 
serous coat. 
Treatment.—Ordinary vermicidal treatment may be 
employed when the number of parasites present is small. 
When complications ensue special treatment must be 
resorted to. 
As a vermicide, ol. tereb. is useful in 2-drachm doses, 
given in milk. Aperients should also be given. Aloes, 
1 drachm, is probably the best. 
Ascaris Suis.—This large worm inhabits the intestine 
of the pig. In appearance it much resembles the Ascaris 
lumbricoides of man, and often reaches a length of 
Io inches. 
It is not very common, and may produce no very 
marked symptoms. If present in large numbers, the 
worms may cause intestinal obstruction, with colic. 
Epileptiform spasms and convulsions have also been 
noted. 
Treatment.—Santonin or areca-nut is usually effi- 
cacious, and should be followed by a purgative. 
