GENERAL DISEASES. 97 



Morbid Anatomy. — The blood is darker, and is not so 

 coagulable as in the healthy condition. The membranes 

 most marked by petechial extravasations are those of the 

 nose and mouth, and those of the heart and abdomen. 



The connective tissue in many parts of the body has a 

 reddish or rusty tinge. 



The mucous and submucous tissue of the throat, as well 

 as the glands in the neighbourhood, are swollen and in- 

 filtrated with exudation. 



Diagnosis. — Scarlatina may be confounded with purpura 

 hoenarhagica, erysipelas, and eczema. 



The petechise in scarlatina are minute spots which may 

 form patches by coalescing together, and they are scarlet in 

 colour. In purpura they are of a dark purple hue. Sore 

 throat is never absent in scarlatina, and but rarely present 

 (unless it be a symptom of previous disease) in purpura. 



' Also in scarlatina the swellings are at first in the form of 

 lumps, whereas in purpura they show an even surface, occu- 

 pying the face as a whole, or the limbs, and terminate 

 abruptly above, as if a cord had been tightly drawn around 

 the part ' (Williams). 



In scarlatina there is often swelling, and sometimes sup- 

 puration of the glands (submaxillary and bronchial glands 

 especially) ; whereas in purpura this does not occur. Again, 

 the disposition to sloughing of various parts of the body is 

 characteristic of purpura. 



/ Treatment. — Place the animal in a warm well-ventilated 

 loose box. The food should be laxative and nutritious, 

 and doses of nitrate or chlorate of potassium^^rjulphite of ^ 

 _sodium, may be administered in the drinking-water. This 

 treatment will sufiice for mild cases. 



In the more severe forms, the throat should be fomented 

 with warm water, and hot poultices should be applied and 



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