CLASSIFICATION OF DISEASES. 93 



What are the symptoms ? 



In riiiMAiiY CASES the symptoms come on suddenly; there is 

 an impaired appetite, possibly a tendency to diarrhoea, some fever, 

 and the animal dull and has somewhat of a stiffened gait. 



In secondary cases we usually find the following: As the 

 pneumonia, influenza, etc., subsides, convalescence is prolonged, 

 swellings appear under the abdomen or on the legs, together with 

 petechial or ecchymotic spots on the mucous membranes. 



Swellings on the skin in various parts of the body make their 

 appearance, usually in the most dependent parts — under the ab- 

 domen, between the fore-legs, along the thighs, around the nose. 

 These swellings are large or small, more or less painful, tense, hot, 

 and not of any uniform shape at first. 



As the disease progresses these swellings either disappear or 

 coalesce and become uniform, reaching from the foot up to the 

 stifle in the posterior extremity, and up to the shoulder in the 

 anterior extremity; when the head is the seat, the swelling extends 

 as high as the eyes. There is one peculiarity about the ending 

 of these swellings — that is, they end abruptly, as though a cord 

 had been tied around the part. Often the swellings take place in 

 circumscribed spots over the body resembling urticaria. 



The swelling of the legs causes lameness, a stiffened or jerky 

 motion. The animal does not care to move, the skin often cracks 

 open, becomes bloody. 



The general functions of the body are not particularly al- 

 tered in the beginning, but, as the disease goes on, several func- 

 tions are interfered wath, notably that of prehension. 



Tlie temperature is not much raised at the onset, but later it 

 may rise, in which case it usually denotes a complication. 



The pulse is not very rapid at first, but later it often becomes 

 accelerated, and possibly double. 



Tlie respirations are labored, especially when the head is 

 swollen, the ribs becoming prominent during the act of breathing. 



As the disease goes on, the swellings increase in size, the head 

 resembles that of a hippopotamus, is heavy, causing the animal 

 to rest it on the manger, the extremities become larger, the penis 

 and sheath being so much swollen as to interfere w'ith urination 

 and locomotion. 



The above condition may be noted in the afternoon, and the 

 following day the swellings may have disappeared and their dis- 

 appearance may be thought favorable, but these cases often die in 



