The Prevention of Hog Diseases 473 



through the scrotal wall and covering of the testicle. The 

 testicle and cord are then pulled well out, the cord broken 

 off with a quick jerk and twist, scraped off with a knife, 

 or cut off with the emasculator in order to avoid 

 hemorrhage. The opposite testicle is then removed, and 

 the incisions lengthened by cutting the scrotal w^all to 

 the bottom of the sack, using a probe-pointed bistoury. 



If the cord is severed high up so that the cut end does 

 not hang into the scrotal sack, and complete drainage 

 for the wound secretions and pus provided, there is little 

 danger of fibrous tumors forming as a complication. If 

 such tumors form they should be removed. 



Scrotal hernia is frequently met with. It may be 

 overcome by practicing the covered operation. The hog 

 is prepared for this by withholding feed for twenty-four 

 hours. The animal is held or hung up by the hind legs. 

 The hernia is reduced by manipulating the mass of 

 intestines, so that they drop back into the abdominal 

 cavity. The scrotal sack is cleaned the same as for 

 castration, and an incision made through the scrotal 

 wall, but not through the thin covering of the testicle. 

 The testicle with the cord and covering is drawn well 

 out, a needle carrying a strong silk or linen thread passed 

 through the cord at as low a point as possible, the cord 

 and covering ligated, and cut off about one-half inch 

 above the ligature. The incision in the scrotal sack is 

 then made large enough to insure drainage. 



PARASITES OF HOGS 



Parasites that infest hogs may be classified as external 

 and internal. External parasites are the hog-louse, 

 Hcematopinus suis, which infests the surface of the skin, 



