Symptoms. 



181 



If it is forced open, tears escape profusely, or in the later stages 

 a secretion which is mixed with mucus or pus. The swelling 

 may extend to the sclerotic conjunctiva, as a result of which 

 the cornea is surrounded by a yellowish-red, somewhat elevated 

 ring. The cornea proper is often cloudy, and the epithelium is 

 desquamated from the anterior portions. In some cases an 

 iritis may also develop, with a contraction of the pupil, and 

 the deposit of a yellow 

 fibrinous exudate in 

 the anterior chamber 

 of the eye. 



The catarrh of 

 air passages is first 

 manifested by a rough 

 and dry, later by a 

 moist but always 

 strong and sometimes 

 painful cough, which 

 comes on spasmodi- 

 cally. From the red- 

 dened mucous mem- 

 brane of the nose first 

 a small quantity of a 

 serous, later more pro- 

 fuse muco-purulent 

 discharge escapes, 

 which during spells of 

 coughing is also ex- 

 pelled through the 

 mouth and nose. If the nasal catarrh is severe the sub- 

 maxillary lymph glands are usually swollen and sensitive. 

 Respiration is more or less accelerated and superficial. Per- 

 cussion reveals normal conditions over the thorax, whereas 

 on ascultation, raw, vesicular breathing, dry and moist rales 

 of varying intensity and numbers, may be heard. Sometimes 

 an increased sensitiveness of the thgrax may also be present. 

 The appetite is at first depressed, while the animals willingly 

 take water, although only in small quantities. The mucous 

 membrane of the mouth is warm and dry, the tongue is also 

 dry and coated. Not infrequently difficulty in swallowing may 

 be observed as an indication of the coexisting pharyngitis. 



Gastric catarrh is indicated by the disturbance or entire 

 disappearance of the appetite, also by frequent yawn and a de- 

 sire to lick cold objects. At first there is constipation, during 

 which the feces are dry, forming small balls, covered with 

 mucous shreds. The abdomen is sometimes moderately bloated. 

 Later the feces become softer, or even fluid, and towards the 

 third or fourth day frequently fetid. Sometimes they are of 

 a dirty reddish color, and expelled with straining. Peristalsis 

 is at first depressed, later lively, and in some instances may 



Fig. 35. Fever curve in catarrhal influenza. 



