ORGANS OP LOCOMOTION 239 



three to five months are required from the time of ingestion of the 

 bladder worm by tlie human until ripe segments are eliminated. 

 One ripe segment contains from ten to tliirty thousand ova. 



Swine become infested by ingesting water or food contaminated 

 with the ova of the Tcenia solium. This condition occurs only in 

 hogs that consume human excrements and young swine are more 

 susceptible to this condition than are the aged animals. 



Lesions. — The presence of the cysts typifies Cysticercus cellulosa;. 

 These cysts vary in size from visible points to small beans. They 

 are usually oval in shape, and the scolex can readily be recognized 



Pig. 52. PEDUNCULATED IIEKOMA. 



within as a white point or body. The cyst is surrounded by a thin 

 capsule and contains one head and a thin, watery fluid. After the 

 cyst has persisted for one year or longer it degenerates, the content 

 becoming purulent, and later calcifying. 



Symptoms. — Cysticercosis in swine is rarely recognized clinically. 

 The migration into and irritation of the muscle may cause muscular 

 soreness and disturbed locomotion which, depending upon the extent 

 of the invasion, may be associated with inappetenee, unthriftiness, 

 and emaciation. 



Treatment. — Prophylaxis consists of preventing contamination of 

 swine food and water with human excrements. No curative treat- 

 ment is available. 



