7^ DISEASES OF THE HOG. 



THE INTERNAL PARASITES OF THE PIQ. 



The parasites of the pig are so intimately con- 

 nected with those of the human being that there is 

 no doubt but that in certain stages of their de- 

 velopment nearly all the most dangerous kinds 

 are derived, either directly or indirectly, from the 

 hog to mankind, and in return man furnishes to 

 the hog the eggs of several of their worst parasites. 

 Some of these worms are kept in existence solely 

 by reason of the peculiar relations existing be- 

 tween man and the domestic animals. This is 

 the case particularly in respect to the most com- 

 mon, tape-worm, of men, derived respectively 

 from the flesh of cattle and hogs when imperfectly 

 cooked. Measly pork should be avoided as unfit 

 for food unless thoroughly cooked, yet such pork 

 has been eaten when it was badly infested with 

 measles. It can be easily known by its spawn-like 

 appearance. In this country a very large propor- 

 tion of the hogs not only harbor this entozoon, but 

 also the common lung-strongle. 



GENERAL OBSERVATIONS. 



Worms, sometimes on account of their move- 

 ments and the interruption they offer to the con- 

 tents of the bowels, and their other modes of irri- 

 tation, very often cause uneasiness and pain. 

 From sympathy there is very frequent sensation of 

 itching at the anus and nose, producing a disposi- 

 tion to scratch or rub the root of the tail and poke 

 the nose into the ground. This is a very common 



