COMPLICATIONS 31 



and a necrotic stomatitis of calves and pigs, each 

 of which partakes somewhat of the nature of a 

 specific infectious disease, but none of which, with 

 the possible exception of calf diphtheria, tends to 

 be reproduced regularly, in typical form, by arti- 

 ficial means. 



In swine, B. necrophorus may be the primary, 

 and usually is the exciting cause of various ne- 

 croses which appear in the mouth, stomach and 

 intestines, nasal passages, skin, and lungs, and 

 are designated, respectively, according to loca- 

 tion, necrotic stomatitis, enteritis, rhinitis (bull 

 nose), dermatitis and pulmonary bacillosis. The 

 typical lesion consists of a dark brown necrotic 

 patch which spreads slowly and tends to penetrate 

 the deeper structures. Frequently a yellowish- 

 brown scab or false membrane is formed. In ne- 

 crotic stomatitis and enteritis especially, numer- 

 ous lesions often coalesce until large areas are af- 

 fected, and, depending on location, even the man- 

 dible itself may be involved or the intestinal wall 

 penetrated. A foul odor is usually detected. In 

 the mouth, the lesions usually take origin from 

 teething wounds or other slight abrasions ; in the 

 stomach and intestines, hog cholera lesions and 

 various irritants prepare the ground for their 

 development; in the nasal passages they follow 

 rhinitis due to other causes ; in the skin, they ap- 

 pear especially on the teats and udders of sows 



