MYCOTIC STOMATITIS 207 



by the fact that blisters do not occur in necrotic stomatitis and 

 the ulcerated patches that appear in the beginning of the dis- 

 ease, principally involving the mouth and tongue, become cov- 

 ered with a yellowish, cheesy-like material. Calves are more apt 

 to become affected with sore mouth than are adult cattle. Foot 

 and mouth disease spreads more rapidly through a herd than 

 does necrotic stomatitis and affects cattle of all ages, also sheep 

 and swine. 



' j. ' Ergotism (poison from eating ergot) may be distinguished 

 from foot and mouth disease in that the lesions occurring in 



Fig. 71. — A cow affected with foot and mouth disease. Note the accumulation of ealiva 

 about the lips. (From report of the Bureau of Animal Industry.) 



ergotism are confined to the ears, tail, and legs, usually below 

 trie knees or hocks. Vesicles or blisters do not occur in ergot 

 poisoning, the lesions instead consisting of a dry-sloughing 

 process. The tips of the ears will become dry and slough off. 

 The tail may likewise become affected. The ankles swell con- 

 siderably and later become circumscribed with a deep crack or 

 fissure entirely surrounding the leg as a result of the sloughing. 

 Mycotic stomatitis (inflammation of the mouth caused by 

 molds or fungi) is characterized by the formation of a croupous 

 membrane or portions of the mucous lining of the mouth which 



