48 SWINE DISEASES 



result in peritonitis. The presence of several of these 

 parasites may be suspected when there is catarrhal 

 enteritis, especially when the swine are being properly 

 cared for and given a proper diet of wholesome food. 

 Usually an occasional worm will be passed in the feces. 

 Unless infestation is sufficiently extensive to produce 



Fig. 2. ASCARIS S17UM. 



visible symptoms, a positive diagnosis may not be made 

 until the parasites are eliminated or the ova are identified 

 in the feces by microscopic examination. If this con- 

 dition persists for some time the affected animals become 

 unthrifty and emaciated. 



Treatment: Prevention is far more satisfactory 

 than treatment of infested hogs. The extent of infesta- 



