PART I. 

 DISEASES OF THE RESPIRATORY ORGANS. 



CHAPTER I. 



DISEASES OF THE NOSE AND ADJACENT 



SINUSES. 



RHINITIS. NASAL CATARRH. 



Forms. — Depending upon the degree of inflammation the 

 following clinical forms of rhinitis may be distinguished : 



Catarrhal (acute and chronic). 



Croupous. 



Diphtheritic. 



Follicular. 

 Acute Nasal Catarrh {Rhinitis, Acute Coryza). — ^Definition 

 — ^An acute catarrh of the air passages of the head. It may 

 occur as a primary affection or may be secondary to another 

 disease. 



Etiology. — Primary. — It is rarely due to the inhalation of 

 foreign matter such as dust, chaff, grains, seeds, etc. Sponges 

 placed in the nostrils to prevent discharge or to reduce the 

 sound in roaring is an infrequent cause. Irritants, fumes, 

 gases or smoke occasionally produce it. The common predis- 

 posing cause is cold. Rhinitis is most frequent during the 

 changeable weather of the late fall and early spring. The 

 exciting cause is undoubtedly infection. 



Secondary. — ^Nearly all of the diseases of the respiratory 

 tract are accompanied by rhinitis, as are specific infectious 

 diseases, such as strangles, influenza, hog-cholera, glanders. 



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