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There is a worm inhabiting the stomach of young dogs, the 'Ascaris Marginata', a frequent source of sickness and occasionally of spasmodic colic, by rolling itself into knots. It seems occasionally to take a dislike to its assigned residence, and wanders into the oesophagus, but rarely into the larger intestines.

Species Organ Ascaris megalocephala Intestines Sclerostoma equinum Large intestine and blood-vessels Sclerostoma tetracanthum Large intestine Oxyrus curvula Large intestine Oxyrus mastigodes Large intestine

The appearance of the ascaris in the dog's stools is, of course, the diagnostic symptom. But areca-nut does better for tape-worm, so we cannot do better than trust to pure santonin. The dose is from 1 grain for a Toy up to 6 grains for a Mastiff. Mix it with a little butter, and stick it well back in the roof of the dog's mouth.

Species Organ Haemonchus contortus Abomasum Ascaris ovis Small intestine Strongylus filicollis Small intestine Oesophagostomum columbianum Intestines Uncinaria cernua Small intestine Trichocephalus affins Large intestine Strongylus filaria Bronchi Strongylus rufescens Bronchi and air follicles

INTESTINAL PARASITES OF HOGS. The Ascaris suis or common round worm is very commonly found in the small intestine. It may also work its way into the bile duct. Sometimes, after a hog has died, this parasite migrates forward into the stomach and gullet. It is usually found with its proboscis or thorn imbedded in the wall of the small intestine.