g DISEASES OF THE DOMESTIC ANIMALS 



although change of diet often causes temporary improvement, as 

 from dry food to pasture. 



The severity of the symptoms is much greater than one would 

 suspect from the post mortem appearances. On autopsy the chief 

 lesions are found in the lower two-thirds of the small and in the 

 large intestines. The mucous membrane is commonly alone in- 

 volved and ulceration is generally absent. The most noticeable 

 condition is an unusual corrugation of the mucous membrane. The 

 rugae or ridges are stained on their summits with points, streaks 

 or patches of congestion or hemorrhage. The mesenteric glands 

 are enlarged. 



The disease is chiefly to be differentiated from tuberculosis 

 by the tuberculin test, and from secondary anemia from intestinal 

 parasites by microscopic examination of the feces. 



Treatment. — Since the disease is infectious and its existence 

 threatens sound cattle, and since treatment has little permanent 

 effect, the treatment should be prophylactic. Diseased animals 

 should be at once isolated and destroyed when the diagnosis is 

 certain. All feces from them should be deeply buried or burned. 

 The stable, after thorough removal of fecal contamination by scrap- 

 ing and scrubbing, should be disinfected. Quicklime may be used 

 on the floors and 5 per cent, solution of chlorinated lime or 3 per 

 cent, solution of formalin applied to the walls, and whitewash con- 

 taining the same amount of one of the latter, brushed on the walls. 



Internally, intestinal antiseptics and astringents, as salol, bis- 

 muth subnitrate, turpentine, etc., have been given, and creolin 

 subcutaneously. (For Dysentery, see also Enteritis.) 



Eczema. 



In Dogs. — This is the most common skin disease of dogs. 

 The treatment depends upon the stage. There are, from a practical 

 point of view, three stages : an acute stage, with swollen, red, itchy 

 and often pimply (papules) skin; an exudative stage, in which 



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