112 THE HOG. 



was observed in a pig eighteen months old. On carefully exarain 

 ing him after death, the muscles were discolored and softened. 

 There were in the psoas muscles numerous cysts inclosing hydatids. 

 Other cysts with their parietes, more thickened and fibrous, inhabited 

 the muscles surrounding the trochanter, containing likewise hydatids. 

 These parasites are also found in the lungs, the liver, and the corti- 

 cal substance of the kidneys. 



" Between the internal surface of the cyst and the hydatid was a 

 fine white powder, resembling pulverized bones. The spinal marrow 

 was softened about the lumbar and sacral regions, and the mem- 

 branes were slightly reddened, particularly about the roots of the 

 lumbar nerves." 



It is generally the hinder parts of the pig which are paralyzed, 

 either wholly or partially ; in the former case the animal is totally 

 unable to rise, in the latter he totters in his gait and falls wher 

 attempting to walk. Paralysis frequently accompanies chronic dis- 

 ease of the digestive organs, and is attended with loss of appetite, 

 acceleration of the pulse, and swelling of the tongue. This disease 

 is seldom obstinate ; a removal of the predisposing cause, good 

 nourishing food, a clean and well-ventilated sty, moderate exercise, 

 and gentle purgative or cooling medicine, will generally restore the 

 animal to perfect health in a short space of time. 



TETANUS, OR LOCK-JAW. 



This disease, which is commonly denominated Locked-jaw, is by no 

 means an unfrequent malady among pigs. The symptoms are at 

 first spasmodic motion of the head and of one or more of the extremi- 

 ties, grinding the teeth and rigidity of the jaws. This is soon fol- 

 lowed by stiffness of the neck and greater part of the frame, and an 

 unnatural upraised position of the head. The castration of young 

 pigs will frequently produce this disease, especially if the animal is 

 too w.ell fed for a few days after the operation. It also often appears 

 among pigs that are driven far to market, especially if when heated 

 by travelling or exposure to the sun, they are suffered to roll them- 

 selves in ditches or streams, as they will endeavor to do. Bleeding, 

 warm baths, lotions, &c., friction with stimulating oils, purgatives if 

 they can be got into the mouth, if not, enemas and anodynes are the 

 most efficient remedies. But the disease is too often fatal, and runs 

 its course very speedily ; if the animal survives the first twelve or 

 eighteen hours, some hopes of his eventual recovery may be enter- 

 tained. 



RABIES. 



Swine are by no means exempt from this frightful diseae ; ther* 

 are numerous cases on record in which they have been inoculated by 



