236 



SWINE PRACTICE 



atous degeneration of the liver and kidneys. The affected muscle 

 first becomes swollen, and a]ipears of a gray color. About eight 

 weeks after the embryos begin to migrate, small gray or grayish- 

 white specks may be detected in the muscle tissue. This condition 

 is especially evident in the diaphragm, intercostal muscles, muscles 

 of the cervical region, and tongue. If the lesions are of long stand- 

 ing they will contain calcium salts, which may be detected as small, 

 gritty masses. Microscopically, in the first year of muscular trich- 



Fig. 49. 

 cellulosae. 



CYSiKiHcosis (Fork Keasles). A, muscle; B, fat; C, cysticercws 



inosis the larvje can be readily detected as small, coiled, thread-like 

 worms within a capsule. 



Symptoms. — Clinical trichinosis has been observed only in experi- 

 ments, or at least the disease has not been recognized by the clinician. 

 Experimentally, intestinal trichinosis becomes evident in from three 

 to six dciys after infestation. The disease is manifested by the fol- 

 lowing symptoms: inappetencc, vomition, diarrhea, colic, arched back, 

 unwilliiiguess to move, and rapid emaciation. Evidence of muscular 

 tricliinosis appears in about Uvn weeks, and is manifested by the fol- 

 lowing symptoms : rubbing against posts or other objects, stiffness, 



