INFLUENZA. • 605 



at the end of the ropCi It wanders almost invariably in one direction. 

 The pupils may be dilated or contracted, or we may find one condition 

 in one eye and the opposite in the other. 



The period of excitement is followed by one of profound conia, in 

 which the animal is immobile, the head hanging and placed against 

 the corner of the stall, the body limp, and the motion, if demanded of 

 the animal, unsteady. Little or no attention will be paid to the sur- 

 rounding noises, the crack of a whip, or even a blow on the surface of 

 the body. The respiration becomes slower, the pulsations are dimin- 

 ished, the coma lasts for variable time, to be followed by excesses of 

 violence, after which the two alternate, but if severe the period of 

 coma becomes longer and longer until the animal dies of spasms of 

 the lungs or of heart failure. It may die from injuries which occur 

 in the ungovernable attacks of violence. 



Complication of the feet. — The feet are the organs which are next 

 in frequency predisposed to congestion. This congestion takes place 

 in the laminae (podophyllous structures) of the feet. The stupefied 

 animal is roused from its condition by excessive pain in the feet, and 

 assumes the position of a foundered horse ; that is, if the fore feet 

 alone are affected they are carried forward until they rest on the heels, 

 and if the hind feet are affected all of the feet are carried forward, 

 resting on their heels, the hind ones as near the center of gravity as 

 possible. In some cases the stupor of the animal is so great that the 

 pain is not felt, and little or no alternation of the position of the 

 animal is noticeable. The foot is found hot to the touch, and after a 

 given time the depressed convex sole of typical founder is recognized. 



Pleurisy.- — ^This is a rare complication, but when it does occur it is 

 ushered in by the usual symptoms of depression, rapid pulse, small 

 respiration, elevation of the temperature, subcutaneous edema of the 

 legs and under surface of the belly, and we find a line of dullness on 

 either side of the chest and an absence of respiratory murmur at the 

 lower part. If it is severe there may be an effusion filling one- fourth 

 ,to one-third of the thoracic cavity in from thirty-six to forty-eight 

 hours. 



Pericarditis is an occasional complication of influenza. It is 

 ushered in by chills, elevation of the temperature ; the pulse becomes 

 rapid, thready, and imperceptible. The heart murmurs become in- 

 distinct or can not be heard. A venous pulse is seen on the line of the 

 jugular veins along the neck. Respiration becomes more difficult and 

 rapid. If the animal is moved the symptoms become more marked, 

 or it may drop suddenly dead from heart failure. 



Peritonitis, or inflammation of the membranes lining the belly and 

 covering the organs contained in it, sometimes takes place. The gen- 

 eral symptoms are similar to those of a commencing pericarditis. 



