570 ACUTE GENERAL INFECTIOUS DISEASES 



is deep and explosive. The respirations are accelerated. 

 Auscultation reveals coarse, sharp vesicular murmurs, and 

 rhonchi. As the inflammation proceeds it involves the 

 bronchioli (capillary bronchitis) which produces increased, 

 labored respirations. At this stage there is usually a feeble 

 harassing cough, most noticeable when the dog is made to 

 move, or if the thorax is manipulated. The auscultatory 

 sounds become increased, and there will be noted dry or 

 moist, crackling, or fine rales. In very weak, or young 

 dogs, in which the exudation accumulates in the bronchioli, 

 it is very sure to produce a bronchopneumonia on account 

 of the secretions being drawn into the alveoli. The result- 

 ing pneumonia will be recognized by: (a) The great increase 

 in the temperature; (6) the excessive dyspnea (inflation of 

 cheeks at each expiration) ; (c) the sitting posture of animals 

 with elbows spread apart to facilitate respiration; (d) irregu- 

 lar vesicular murmur; (e) irregular dulness and tympany on 

 percussion; (/) the bronchial breathing which w r ill be audible. 

 The cough at this stage becomes very dull and weak. The 

 nasal discharge becomes very fetid, and often has a greenish 

 cast. During the last stages as the heart becomes w r eak, 

 symptoms of edema of the lungs appear in the form of 

 severe dyspnea, and bubbling rhonchi. 



o. Symptoms Shown by the Nervous System. This disease 

 in practically all cases is accompanied by some nervous 

 phenomena. It often begins, especially in weak individuals, 

 with marked dulness and depression. These symptoms 

 may be all that the animal will show. However, in a great 

 many cases, the nervous symptoms develop early in the 

 course of the disease, and are manifested by excitement, 

 restlessness, yelping, cries, even simulating some of the 

 symptoms of furious rabies. In many instances tremors 

 of muscles, tonic and clonic spasms, which mpy involve 

 certain groups of muscles or the entire muscular system 

 are observed. Local spasms and twitchings of the muscles 

 are frequently observed involving the muscles of the face, 

 over the region of the head and neck. The masseter muscles 

 are frequently affected, resulting in chattering teeth and 

 foaming at the mouth. Spasms of the muscles of the neck 



