90 



DISEASES OF THE HOG. 



healthy and neither animal seemed to be in any 

 way affected by them. The loss of power of the 

 hind parts of pigs which has been attributed to 

 kidney worms, is not due to a parasite, but to par- 

 alysis of the muscles of the hind parts. I have made 

 careful investigations of such cases, but failed to 

 find any worms or any disease of the kidneys. 

 Paralysis of the hind parts would not be the symp- 

 tom of kidney disease. 



TRICHINA SPIRALIS. 



Figure 76. 



Figure 76.— A small piece of human muscle containing 

 encysted young of Triciiina spiralis Owen, enlarged forty-five 

 diaiueters. From Hearth and Home, after Leuckart. 



