70 SWINE DISEASES 



Treatment. Because of the location and nature of 

 the lesion, treatment for echinococcosis is ineffectual. 

 The condition is readily prevented by treating with 

 teniafuges all valuable dogs that are associated in any 

 way with the swine and by destroying all worthless 

 curs and properly disposing of their carcasses. 



Cytticercotit 



Hepatic cysticercosis of swine is not very common. 

 It is found principally in young pigs, where it is the 

 result of invasion of the liver with embryos of the Tsenia 

 marginata of the dog. These embryos are obtained 

 in food that has been contaminated with dog feces. 

 They gain entrance to the liver by way of the portal 

 vein. Some of the embryos pass out of the liver in the 

 hepatic vein; others bore through the organ and its 

 capsule into the peritoneal cavity. 



Lesions. In extensive invasion the liver is enlarged. 

 There may be evidence of perihepatitis. A small elevation 

 may occur upon the surface and in each elevation a 

 small opening may be observed. The liver is of a varie- 

 gated color, due to alternating areas of hemorrhage and 

 degeneration. 



Symptoms. Unthriftiness, weakness, anorexia, and 

 increased thirst may be observed in hepatic cystic- 

 ercosis. The affected animals may become rapidly 

 emaciated; there may be evidence of peritonitis and in 

 exceptional cases the animals may die suddenly, but as 

 a rule they linger for several weeks. 



Treatment. Symptomatic treatment may be re- 

 sorted to, but it is doubtful if satisfactory results will be 

 obtained. This condition may be prevented by the proper 

 treatment or disposal of dogs as recommended under 

 echinococcosis. 



PANCREAS 



Little is known concerning the diseases of the pan- 

 creas. A condition known as multiple fatty necrosis 

 occurs in swine and is thought to be the result of obstruc- 



