CLASSIFICATION OF DISEASES. 69 



less painful, shown by the raising of the leg, especially if pressure 

 be made with the fingers. 



There is marled debility and prostration, shown by the stagger- 

 ing and cross-legged gait of the animal. In standing in the stall, 

 the head is lowered (hangs his head), there is a depressed appear- 

 ance, takes little if any notice, apparent headache, pulse quick- 

 ened and soft, temperature elevated— 104°, 105°, 106° F.— and 

 remains high for five, six, or seven days and then lowers; the res- 

 pirations are more or less accelerated. 



At other times the gastric and intestinal form is present; there 

 is congestion of the liver, shown by the yellowish or reddish color 

 of the visible mucous membranes; also a sour odor to the breath, 

 constipation, followed by diarrhoea, in some cases caused by catarrh 

 of the mucous membrane of the small intestines, colicky pains are 

 sometimes present. 



At other times the nervous system becomes affected, spinal 

 trouble arises, there being loss of power of the hind extremities, 

 sometimes ending in complete paralysis. 



What complications may arise? 



Laryngitis is probably the most common. 

 Pneumonia, which usually assumes a low form, ending in 

 gangrene. 



Pleurisy, with effusion, which usually ends fatally. 

 Purpura Jicemorrhagica is quite a common complication. 



How may influenza be diagnosed ? 



By the suddenness of the attack, great prostration, the irreg- 

 ularity of the temperature, by the gait, the condition of the eyes. 



At the onset it may be difficult to make a diagnosis in some 

 cases, but soon the symptoms make the diagnosis easy. 



What is the prognosis and the duration? 



Simple uncomplicated cases recover in from seven to ten days 

 or two weeks. When complicated, the prognosis becomes grave 

 and varies according to the severity of the symptoms and the con- 

 stitution of the animal. These cases may last two or three weeks 

 or longer. 



What is the treatment ? 



Expectant and supporting treatments are used. 



