PREVENTION, SYMPTOMS AND TREATMENT 293 



Active. Form.— In this, the lips swell twice or thrice their 

 normal size. They are covered, first, with papules which develop 

 into pustules, and these running together, become covered with 

 scabs under which suppuration goes on. Feeding is interfered 

 with. The disease may spread up the face to the eyes. There is, 

 then, a thick muco-purulent nasal discharge, swelling of the nos- 

 trils, obstructed breathing, and conjunctivitis. Suppuration may 

 be so extensive about the muzzle that a part of the lip and tip of the 

 nose may slough away. In the destructive type of the disease, the 

 long, beaded filamentous form of the bacillus is found. Erosions 

 and red, fungoid, wart-like vegetations may occur on the gums and 

 the roof of the mouth. Similar lesions to those on the lips may 

 appear on the legs, about the coronet or joints, and in the fold of 

 the fetlock. Lameness ensues. On removing the crusts or scabs, a 

 red, granulating and sppurating surface is seen. The lesions on 

 the legs may or may not co-exist with those on the lips. 



(2) Sore Mouth in Lambs. — This is a milder and more 

 chronic form of lip ulceration. It is not associated with leg ulcer- 

 ation, and rarely results in sloughing and destruction of the lip and 

 nose. It occurs more often in lambs in the fall, but sometimes early 

 in the season. The onset is sudden, with much swelling of the lips. 

 At the margin of the skin and mucous membrane appear either 

 warty patches or, in more severe casts, diffuse, fissured crusts on 

 both lips and on the muzzle. Removal of the scabs exposes a raw,, 

 purplish, bleeding surface, or yellow-white, suppurating ulcers. 

 Erosions, or soft, warty, fungoid elevations may form inside the 

 mouth. Yellowish necrotic areas appear at the corners of the 

 mouth and heal last. The lesions have an odor of Limburg cheese. 

 Feeding is made difficult, and in some cases there is loss in weight. 

 Usually the lesions heal under the scabs without the appearance of 

 open ulcers. While the disease is not often fatal, yet the most 

 malignant type of leg-and-lip ulceration may arise in sheep exposed 

 to such cases. 



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