495 



jaw, or in tlie iutcrinaxillary space. This is at first pufTy, swollen, 

 somewhat hot and teiuler, and finally becomes dirstinclly so, and an 

 abscess is felt, or having broken itself the discharge is seen dripping 

 from a small opening. When the discharge from the nostrils lias fully 

 developed the fever nsually disappears and the animal regains its appe- 

 tite, unless the swelling is sufQcieut to interfere with the function of 

 the throat, causing -pain on any attempt to swallow. At the end of 

 four or six days the discharge lessens, the soreness around the throat 

 diminishes, the horse regains its appetite, and in two weeks has re- 

 gained its usual condition. Old and strong horses may have the disease 

 in so light a form that the fever is not noticeable ; they may continue 

 to eat and i^erform their ordinary work as usual and no symptom may 

 be seen beyond a slight discharge from the nose and a rare cough, 

 which is not sufficient to worry any but the most particular owner. 

 But, on the other hand, the disease may assume a malignant form or 

 become complicated so as to become a most serious disease, and even 

 prove fatal in many cases. Inflammation of the larynx and bronchi, if 

 excessive, will {produce violent, harsh coughing, which may almost 

 asphyxiate the animal. The large amount of discharge may be mixed 

 with air by the difficult breathing, and the nostrils, the front of the 

 animal, manger and surrounding objects become covered with a white 

 foam. The inflammation may be in the lung itself (lobular pneumonia) 

 and cause the animal to breathe heavily, heave at the flanks, and show 

 great distress. In this condition marked symptoms of fever are seen; 

 the appetite is lost, the coat is dry, the horse stands back in its stall at 

 the end of the halter strap with his neck extended and his legs propped 

 apnrt to favor its breathing. This condition may end by resolution, 

 leaving the horse for some time with a severe cough, or the animal may 

 die from choking up of the lungs (asphyxia). 



The swelling under the jaw may be excessive, and if the abscess is not 

 opened it burrows toward the throat or to the side and causes inflam- 

 mation of the parotid glands and breaks in annoying fistulas at the 

 sides of the throat and even up as high as the ears. Eoaring may occur 

 either during a moderately severe attack from inflammation of the throat 

 (larynx), or at a later period as the result of continued lung trouble. 

 Abscesses may develop in other parts of the body, in the poll, in the 

 withers, or in the spaces of loose tissue under the arms, in the fold of 

 the thigh, and, in entire horses, in the testicles. 



Daring the course of the disease or later, when the animal seems to 

 be on the road to perfect recovery, abscesses may form in the internal 

 organs and i)roduce symptoms characteristic of disease of those i)arts. 



Delirium. — Roaring, plunging, wandering in a circle, or standing with 

 the head wedged in a corner of the stall, indicates the collection of 

 matter in the brain. Sudden and severe lung symptoms, without pre- 

 vious discharge, point to on abscess between the lungs, in the medias- 

 tinum; colic, which is often continuous for days, is the result of the 



