INFLUENZA OF THE HORSE 345 



appearing excessively fatigued. The gait is staggering, and 

 crackling of joints is heard when the patient is moved. 



The temperature is elevated (103° to 105° F.). It usually 

 drops by crisis on the second or third day. The pulse in the 

 earlier stages is relatively low compared with the fever, but as 

 soon as cloudy swelling of the heart begins it goes up to 60 to 

 100, and becomes irregular and weak. 



Eye Lesions. — Conjunctivitis appears early, and later kera- 

 titis and iritis (exudate in anterior chamber, contraction of 

 pupil, etc.). The blood is charged with bile pigment, hence 

 the conjunctiva assumes a yellowish, ochre, or a natural 

 mahogany color. Sometimes a phlegmonous conjunctivitis 

 with marked swelling and eversion of the eyelids occurs. 

 These symptoms generally rapidly subside, provided the cases 

 take the normal benign course. 



Respiratory Tract. — Cough is usually present. It is gen- 

 erally strong and moist. Nasal discharge, at first clear but 

 later turbid and more profuse, is a constant symptom. The 

 submaxillary glands are swollen. The patient shows moder- 

 ate dyspnea; the respirations 20 to 25. Percussion normal. 

 Auscultation, exaggerated vesicular breathing and moist 

 rales. 



Digestive Tract. — ^Lost or impaired appetite; during the 

 fever increased thirst is noted. Usually symptoms of catar- 

 rhal stomatitis and pharyngitis are present (coated tongue, 

 warm, congested mucous membranes; regurgitation of water 

 through the nostrils). The gums are swollen ("lampas"), 

 and along their border a marked yellowish discoloration is 

 seen. The bowels during the febrile stage are constipated, the 

 feces passed in the form of hard, small, mucous-covered pel- 

 lets of sour odor. Later they become soft and fetid, exhaus- 

 tive diarrhea with tenesmus sets in. In some cases moderate 

 colic symptoms occur (pawing, lying down, slight distention 

 of abdomen). 



Urinogenital Tract. — During the height of the fever very 

 little urine is voided. Its specific gravity is high, color dark, 

 reaction acid. It is rich in sediment. Under the microscope 

 tube casts and epithelial cells (renal pelvis, bladder) are found 

 in it. With the falling of the temperature a critical polyuria 



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