296 DISEASES OF THE SKIN 



nodules which appear in the harness rests, legs, or other parts 

 of the body. The nodules ultimately erupt, leaving behind 

 ulcers which are covered with reddish-brown granulations. 

 On careful examination small, hempseed-sized, yellow, cheesy, 

 or calcified foci may be noted. In these centers the filarial 

 larvse are found. The ulcers show a tendency to spread and 

 are very obstinate to treat. This is due to biting and rubbing 

 by the patient and the irritation caused by flies. The ulcers 

 usually heal after the fiy season, but recur the following 

 summer. 



Treatment. — Treatment consists in preventing the animal 

 from rubbing or biting the part and flies from reaching it. It 

 is recommended to paint the ulcer with a thin layer of sul- 

 phid of arsenic, which forms a dry scab, under which healing 

 occurs. Picric acid (1 per cent.) and glycerin are also good. 

 Other remedies are chloroform, ether, or iodoform applied 

 daily. Sometimes the hot iron is efl^ective, as is curetting or 

 even the total extirpation of the affected area. 



FUaria Hemorrhagica. — This is a fine, thread-like worm 

 28-70 mm. long which is parasitic and lives in the sub- 

 cutaneous and intermuscular connective tissue of Oriental 

 horses. It causes during the summer months skin hemor- 

 rhages. The blood raises the epidermis or skin in the form 

 of a hazelnut-sized or small hematoma which ruptures in 

 one to two hours, its contents flowing over the skin. Usually 

 a number of these nodules occur close together so that the 

 invaded area is covered with blood. The condition disap- 

 pears in winter to recur the following summer. Healing 

 usually occurs spontaneously. The disorder is not serious, 

 although objectionable. 



Treatment. — ^The treatment consists in washing the skin 

 with an antiseptic and protecting the bloody area from the 

 harness. 



LIP-AND-LEG ULCERATION OF SHEEP. 



Necrobacillosis. 



Definition. — Necrobacillosis is an inflammatory process 

 which terminates in necrosis of the skin and mucous mem- 



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