60 THE TRACTICE OF VETERINARY MEDICINE. 



susceptible, and suffer more when attacked than the light 

 breeds. 



Symptoms. — The symptoms of influenza vary considerably 

 in intensity and form. This is on account of the disease 

 attacking different parts at different times. Any organ or 

 organs may be attacked, and as a matter of course, the 

 leading symptoms depend upon and are governed by the 

 organ, or set of organs, most severely affected. Dulness is 

 the first symptom observed, the animal appearing languid, 

 and in many cases the slightest exertion will cause him to 

 sweat freely. The coat is staring, and the animal has an 

 unthrifty appearance generally. A slight cough is heard 

 now and then. The circulation is not affected, neither is 

 the temperature increased at this time ; but of course both 

 temperature and circulation become affected as the disease 

 progresses. The appetite is gone or impaired. The mouth 

 is hot and dry. A slight rise of the animal heat takes place. 

 The cough increases in frequency and is easily excited by 

 pressure over the region of the larynx ; as in a large majority 

 of cases the respiratory organs are affected. The urine is 

 scanty, and the bowels are costive, the faeces being hard 

 and slim)% and some of the constituents of the urine are 

 increased in quantity. The pulse runs up, except when the 

 nerve centres are affected. More decisive symptoms 

 now appear. When made to walk out, the patient reels 

 and staggers, and appears to be very weak, the staggering 

 gait occurs in consequence of the poison in the system 

 affecting the nerve centres, and is not the result of debility. 

 The patient also acts as though suffering from headache, 

 and there is good reason to suppose that such is the case. 

 In many cases the breathing becomes affected ; this is best 

 noticed by watching the nostrils, as the abdominal breath- 

 ing one might naturally expect to see is not present. 

 If the lungs or bronchial tubes become affected, all the 



