CHAPTER m. 



DISEASES OF THE GLANDS AND NASAL UEMBBANBB. 



f . «I>AMI>KS8. n. TAKCT. 111. DISTEMPER. IV. NASAL GLEET. — — V. KASAft 



POLYPUS. 



I. Glanders. 



Causes. — This seems to be primarily a disease of the lymphatic and 

 nasal glands, and conlSned to them ; but upon this point authorities dis- 

 agree, and it is contended by some that all the air passages are always 

 affected— that it is a kind of phthisic, or incipient pulmonary disorder — 

 and that whether the ulcers appear on the membrane of the nose prior or 

 subsequent to the formation of tubercles in the lungs does not invalidate 

 the proposition that the earliest external manifestations are but the 

 effects of pulmonary derangement. The most tenable conclusion, how- 

 ever, is plainly this : that inflammation of the membrane of the nose, 

 and confined to that membrane, at last results in ulceration ; that the 

 matter discharged from these i« poisonous, and acts upon the glands by 

 means of the absorbents with which it comes in contact, and is also 

 inhaled into the lungs with the air as it passes through the nasal cavities, 

 till at length both the circulatory and the respiratory systems are gen- 

 erally diseased. 



Whence this poison is derived is not at all clearly defined. The diseas« 

 is both spontaneous, (bred in the horse), and contagious ; but it is doubts 

 less due far more frequently to predisposing cause than to contagion. It; 

 IS found as a prevalent disease where neglect, filth, and foul atmosphere 

 exist ; and we may reasonably conclude that poisonous inhalations, acting 

 upon the delicate and easily irritated membrane of the nose, produce 

 that incipient ulceration from which the subsequent general poisoning 

 proceeds. In close stalls, the carbonic acid given off from the lungs, 

 (which gas is of a deadly poisonous character), passes again and again 



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