SYMPTOMS 337 



Usually the nervous depression co-exists with the fever. 

 The animal may hold its head down and appear to be coma- 

 tosed. Extreme muscular debility is frequently associated 

 with this stupor. Tremors may occur, the hind legs may give 

 w^a}- while walking and paralysis of the hind quarters appears 

 in a few cases. 



The oral mucous membrane is greatly congested, hot, drj^ 

 or coverad with mucus. There is sometimes difficulty in 

 swallowing. The animal frequently yawns. There is usually 

 constipation in the beginning of the disease w-hich may be 

 accompanied with colic. The feces are formed into small hard 

 balls and are covered with masses of mucus. Later, diarrhoea 

 with considerable tenesmus usualh' occurs. The feces are 

 of a thin, pulpy, and even fluid consistence, and sometimes 

 have a foetid odor. At the beginning of the attack the urine 

 is alkaline but it becomes acid when the intestinal lesions are 

 developed. It rarely contains albumin but desquamated epi- 

 thelial cells of the bladder are often present in large quantity. 

 A severe affection of the eyes is quite constant and quite a 

 characteristic symptom of influenza. At fir.st it consists chiefly 

 of catarrhal and later of phlegmonous, conjunctivitis with 

 considerable swelling of the eyelids which may be followed bj^ 

 keratitis and possibly by an exudative or hemorrhagic iritis. 

 Usually both eyes are affected. The first indications are tears, 

 intolerance of light, intense hyperemia of the conjunctiva and 

 contraction of the pupil. The eyelids swell, are hot, painful 

 and kept more or less continually closed. A grey, muco- 

 purulent secretion accumulates between the eyeball and the 

 eyelids and the eyeball becomes very sensitive to pressure. 

 The cornea at the beginning of the keratitis has a greasy 

 lustre, is at first iridescent, later on exhibits milky opacity 

 over its surface. It is considerably injected with blood at its 

 edge ; the iris becomes swollen and yellowish in color. Often 

 • these inflammatory changes of the eye disappear in a strik- 

 ingh' short time. 



During the further progress of the disease, swellings 

 appear on the extremeties, sheath, epigastrium and lower part 

 of the chest. It mav be concluded that these swellings are 



