PARASITES OF THE ALIMENTARY TRACT 75 
CESOPHAGOSTOMES. 
Gsophagostomum Columbianum.—This parasite is the 
cause of the so-called “‘ pimply gut,’’ which is more 
common in America. It is occasionally seen in this 
country, infection taking place through the spreading 
of manure brought from other countries. 
The male is } inch and the female 3 inch long. The 
whole of the life-history is unknown. 
The eggs are laid in the intestine, and pass out with 
the feeces. 
The embryos are found in small tumours, from the size 
of a pin’s head to a pea, under the mucous membrane. 
They possess no boring apparatus, so that some doubt 
exists as to the precise manner in which they gain their 
position. In these nodules the embryo moults, and 
develops until it reaches about 4 inch in length, when the 
nodules burst, and the worm is set free. 
The intestines must not be used for preparing sausage- 
skins. 
Csophagostomum Inflatum is not so common. 
STRONGYLES INHABITING THE ALIMENTARY CANAL 
OF CATTLE, SHEEP, AND DEER. 
These are of especial importance, as they cause very 
serious wasting disease, accompanied by great mortality. 
The Strongyles inhabiting the stomach and intestine of 
ruminants are : 
Strongylus cervicornis. 
Strongylus contortus. 
Strongylus filicollis. 
Strongylus vicarius. 
Strongylus MacFadyensis. 
Strongylus convolutus. 
Strongylus gracilis. 
WORE DH 
