DISEASES DUE TO INTERNAL PARASITES. 225 



amination, when it will be found that the intestines of the sheep, 

 more particularly the large guts (colon and caecum), are studded 

 with whitish tumors, ranging in size from that of a millet seed 

 to as large as a hickory nut, giving the external coat of the bow- 

 els a knotty appearance, so injuring the gut as to make it worth- 

 less for sausage casings, inflicting serious monetary loss to the 

 butcher. "The adult worm is found in the large intestines of 

 sheep in considerable numbers, and in the same animal may also 

 be found the tumors. The parasite is usually found below the 

 narrowing of the large intestines, where the latter changei from 

 a sac-like receptacle to a large tube, and below the mass of tum- 

 ors. The tumors may, however, extend the entire length of the 

 intestines. It is evident that the distribution of the eggs of this 

 adult would be favorable for sheep becoming again infected by 

 them." — Department of Agriculture Eeport 1890, Cooper Cur- 

 tice. 



There are no special symptoms characteristic of this par- 

 ticular species of worm. The writer has seen hundreds of sheej) 

 killed at the abattoirs, the intestines of which were studded with 

 tumors, the animals in life showing no particular signs of verm- 

 inous trouble. In fact, it was frequently noticeable affecting 

 the intestines in fat, prime sheep, but there is no doubt that 

 serious trouble results to sheep harboring this parasite for any 

 extended length of time, its effects appearing to be more disas- 

 trous in the Southern and South Eastern States of America than 

 in the more northern latitudes. 



The white tumors or cysts being situated under the peri- 

 toneal covering and external to the mucous lining of the intes- 

 tine, are not sixsceptible to the action of medicinal agen+s. The 

 mature worms which are found in the intestines will yield to the 

 same treatment as that prescribed for tapeworms causing para- 

 sitic diarrhoea. 



