CHRONIC NASAL CATARRH 23 



Diagnosis.— Microscopic examination of the nasal dis- 

 charges reveals the presence of the coccidia. In otodectes 

 cynotis mange, catarrhal symptoms of the mucous mem- 

 brane are absent. 



Prognosis. —Unfavorable. 



Treatment. —The nasal passages, eyes and mouth are 

 cleansed with antiseptic solutions and astringents (boric acid 

 2 per cent., zinc sulphate 1 per cent., copper sulphate 1 per 

 cent., creolin 2 per cent.). Small doses of sulphur (0.1-0.2) 

 may be given every four to six hours to produce antiseptic 

 and laxative action. 



Prevention. — (See Infectious Nasal Catarrh of Rabbits.) 



CHRONIC NASAL CATARRH. 



Chronic Coryza. Chronic Rhinitis. 



Definition.— A chronic inflammatory condition of the 

 mucous membrane of the nasal passages with a mucopurulent 

 discharge. 



Etiology.— Usually follows repeated attacks of acute nasal 

 catarrh; ordinary infection; tumors. 



Pathology. — (a) In the productive or hypertrophic form 

 there is a generalized infiltration of the mucosa, particularly 

 that covering the lower portion of the turbinated bones, 

 which leads to a more or less extensive thickening of the 

 mucous membrane. The mucous glands increase in size, 

 there is a thick, viscid secretion, and the nasal passages 

 become obstructed by enlargement of the lower part of the 

 turbinated bones. The atrophic form follows the course of 

 the hypertrophic. The hyperplastic tissue atrophies, the 

 epithelium of the mucosa and the glands is destroyed, and 

 there is a collection of a yellowish, purulent material on the 

 surface of the mucous membrane, (b) The discharge from 

 the nasal passages contains bacteria, leukocytes, red cor- 

 puscles and epithelial cells. 



Symptoms.— A purulent discharge varying in quantity 

 from both nasal passages. This discharge in severe cases is 

 streaked with blood and has a very offensive odor; it causes 



