216 SWINE DISEASES 



general nature as those observed in vulvitis. The prepuce 

 occasionally becomes entirely destroyed, and sometimes 

 the penis becomes involved. 



The vulvar and preputial lesions sometimes interfere 

 wilh, and even inhibit urination, resulting in retention of 

 urine. In such cases in the male the sheath may become 

 enormously distended with urine. 



Treatment. Treatment is confined to the local 

 application of some penetrating disinfectant. Those 

 lesions that become necrotic are removed in order 

 that the disinfectant may have free access to the invaded 

 tissue. Adhesions and other conditions that obstruct the 

 urine should be corrected, at least temporarily, in order 

 that the urine may be voided and thus uremic poisoning 

 prevented. 



Necrotic Dermatitis 



Necrotic dermatitis, aside from the type affecting 

 the lips, vulva, and prepuce, is sometimes encountered. 

 It is of most frequent occurrence in young pigs, and affects 

 any portion of the body. Infection of the Bacillus 

 necrophorus into the skin is probably possible only through 

 abrasions and wounds. 



Lesions. The lesions are practically the same as in 

 other superficial necrobaciliosis. Not infrequently large 

 areas slough, leaving irregular denuded surfaces. This 

 condition is frequently fatal, particularly in those cases 

 having extensive infection where absorption of the prod- 

 ucts is sufficient to insure systemic disturbance. 



Treatment. Treatment consists of removing 

 necrotic tissue and applying some antiseptic that will 

 readily penetrate the infected area. The treatment 

 must be persistent, as relief cannot be obtained from 

 one application. 



Unusual Forms of Necrobaciliosis 



Necrobaciliosis sometimes occurs in the various 

 structures of the eye. This is a serious condition, as the 

 agents used in combating the Bacillus necrophorus have 

 to be used in such concentration that they are injurious 



