72 VETERINARY PARASITOLOGY 
almost any portion of the alimentary tract. It produces 
anemia and marasmus. 
Treatment consists in giving vermicides and purgatives. 
All land should be limed or salted, and drinking-water 
filtered through fine sieves. 
PARASITES INHABITING THE ALIMENTARY CANAL 
OF THE OX. 
Ganglyonema scutatum is sometimes present in the 
cesophagus of the ox. 
Stomach. 
Amphistomum conicum, a Trematode, may inhabit the 
first stomach. It seldom produces noticeable symp- 
toms, except in Australia, where the parasite appears 
to possess exceptional virulence. Various Strongyles 
may inhabit one or other of the stomachs. Hence 
Strongylus contortus, Strongylus gracilis, and Sirongylus 
convolutus may be found in the abomasum. These will 
be discussed more fully later. 
Ascaris Vitulorum is sometimes seen in the abomasum 
of the calf, but more frequently in the small intestine. 
It is a large worm, the female reaching the length of 
25 centimetres (10 inches), and the male about 20 centi- 
metres (8 inches). It is of a reddish-white colour, with 
a transparent skin. The head is small, and the mouth 
trilabiate. It is rare in animals over two years old, 
but is comparatively common in the small intestine and 
abomasum of calves, particularly in the South of France. 
The embryos are the more active in producing the disease. 
The commonest symptoms are those of colic and indi- 
gestion. A few worms may be passed with the feeces. 
Perforation or rupture of the abomasum has frequently 
been recorded. 
Treatment.—Calomel, areca-nut, turpentine, and lysol 
are favourite remedies, and should he followed by 
linseed-oil or saline purgatives, 
