DISEASES OF THE HOIiSE. 505 



In soniG 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 notice- 

 able. 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 

 ushSred in b}^ 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 

 cither 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 cavit}" in from thirty-six to forty-eight 

 hours. 



Perl€(Ardlt(S is an occasional complication of infiuenza. It is ushered 

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

 thready, and imperceptible. The heart murmurs become indistinct or 

 can not bo heard. A venous pulse is seen on the line of the jugular 

 veins along the neck; Respiration becomes more diflicult and rapid. 

 If the animal is moved the symptoms become more marked, or it may 

 drop suddenl}^ dead from heart failure. 



Peritonitis., or inflanmiation 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. The 

 local sA'mptoms are those of pain, especially to pressure on side of the 

 flanks and belh^; distention of the latter, and sometimes the formation 

 of flatus, or gas, and constipation. 



Other occasional complications are nephritis, hepatitis, inflammation 

 of the flexor tendons and rupture of them, and abscesses. 



Diagnosis. — The diagnosis of influenza is based upon continued 

 fever, with great depression and symptoms of stupor and coma; the 

 rapidly developing, dark-saffron, ocher, ^^ellowish discoloration of the 

 mucous membranes, swelling of the legs and soft tissues of the geni- 

 tals. When these symptoms have become manifested the diagnosis 

 of a local complication is based ui:>on the same symptoms that are 

 produced in the local diseases from other causes, but in influenza 

 the local s3"mptoms are frequently masked or even entirely hidden 

 by the intense stupor of the animal, which renders it insensible to- 

 pain. The evidence of colic and congestion, which is followed b}^ 

 diarrhea, indicates enteritis. The rapid breathing or diflicult}^ of respi- 

 ration points to a complication of the lungs, but, as we have seen in 

 the study of the symptoms, the local evidences of lung lesions are fre- 

 quentl}^ hidden. Again, we have seen that inflammation of the feet, 

 or founder, complicating influenza is frequentl}^ not shown on account 

 of the insensibilit}^ to pain on the part of the animal, which indicates 

 the importance of running the hand dail}^ over the hoofs to detect any- 

 sudden elevation of temperature on their surface. 



