.>a^ SWINE PRACTICE 



tarily leave the wound to pupate in the ground. This occurs in 

 three to five days. 



The application of chloroform, naphthalene or other chemicals 

 to the wound is worse than useless. Such measures not only fail 

 to effect the removal of more than a small percentage of the larvte, 

 but they also irritate the highly sensitive tissues and greatly ag- 

 gravate the condition. 



None of the ordinary fly-repellents has any deterrent effect upon 

 the female of the screw-worm fly in the presence of fresh blood, 

 either in recent wounds or in the discharge from screw-worm in- 

 fested wounds. However, a mixture composed of turpentine one 

 dram, phenol one dram and cottonseed oil four ounces is an effective 

 repellent for this fly, and where there is a probabilitj^ of screw- 

 worm infestation it should be applied to fresh wounds and to in- 

 fested wounds as long as the screw-worm larvje are present and the 

 sanguineous discharge continues. One application daily is suffi- 

 cient. 



Botryomycosis 



The Botryomyces ascoformans also infects castration wounds in 

 swine. This condition is very common in certain localities at some 

 seasons. It is of a chronic, insidious nature. The castration wounds 

 may heal and be apparently normal, the first indication of the condi- 

 tion being a slight enlargement of the scrotum. The enlargement 

 persists and gradually increases in size until it is quite large ; in some 

 instances these masses may attain the size of a football. On exam- 

 ination of the affected pig a rather dense mass can be outlined, appar- 

 ently adhered to the substructures but not attached to the skin unless 

 the wound has failed to heal. These masses are found to be encap- 

 sulated with dense fibrous connective tissues. On sectioning the 

 growth, many centers are found from one-half to two inches in diam- 

 eter. These centers contain pus which may be caseous, and the vari- 

 ous centers communicate by means of fistulous tracts. 



Treatment consists of ablation of the entire mass, which is ordinari- 

 ly not difficult as the lesion is subcutaneous and is definitely circum- 

 scribed. .' - j ! '"i 



Scrotal Hernia 



Scrotal hernia is relativelj' frequent in swine. The condition oc- 

 curs at the time or soon after birth and is said to be congenital in 



