122 SWINE PRACTJCE 



Symptoms. — The usual symptoms consist of digestive disturbance 



the magnitude of which will depend upon the extent of infestation. 



The infested animal usually gives evidence of pain, as the parasite 

 lacerates the tissues during its attachment. There may also be mus- 

 cular twitching. 



Treatment. — These * parasites are difficult to dislodge. Long- 



Fig. 26. Gigantorhynchus Hirudinaceous. 



continued medication with creosote alterated with copper sulphate 

 has proved effectual in many cases. 



TUMORS 



Intestinal tumors are not prevalent and are of little economic 

 importance. 



Connective tissue tumors may develop and mechanically interfere 

 with intestinal movement or they may obstruct the lumen of the 

 bowel. Fibromas and myxomas have been observed, usually having 

 their origin in the subserosa or within the serous coat of the intes- 



