PREVENTION, SYMPTOMS AND TREATMENT I7 



years. It first arises more commonly in summer and early autumn. 

 The disease can be communicated from sick to healthy animals by 

 inoculation of the blood and is due to an unknown but filterable 

 virus. The disorder is not, however, communicated from the sick 

 to the well by proximity. What the infecting organism is, by what 

 channels it enters the body, and by what media it is communicated, 

 are all unknown. 



The disease begins suddenly or insidiously and occurs in acute, 

 subacute and chronic forms. Aw intermittent type is also described, 

 but as intermissions are characteristic of all forms, we omit this. 

 The subacute or chronic forms may at any time become acute and 

 no hard and fast line can be drawn to separate this text-book classifi- 

 cation. 



The acute form appears insidiously or suddenly. The following 

 symptoms are characteristic: continuous or remittent fever (104 - 

 107 F.), soft, compressible pulse (60-90), with, however, visible 

 apex beat and palpation on exertion. A systolic murmur at the 

 apex and jugular pulse are often present. Dyspnea on exertion, 

 rapid respiration and great weakness, especially of the hind legs, are 

 seen and the animal has a staggering gait and may fall on turning. 

 Among other symptoms are polyuria, enlarged lymph nodes, edema 

 of dependent parts, pale or yellowish conjunctivae with injected 

 veins and having an oily appearance. Epistaxis and passage of 

 feces streaked with blood are frequent. The disease is usually fatal 

 in five to seven days. Marked blood changes are uncommon in the 

 acute form, but increase of lymphocytes is the rule. In the subacute 

 form the disease is prolonged for weeks or months. The chief pe- 

 culiarity is the marked remissions during which the temperature is 

 not much elevated and the animal has a voracious appetite and gains 

 in flesh and appears to be recovering or even well. At other times 

 the condition is much as in the acute form with high fever, dyspnea, 

 sweating and weakness. The blood changes become characteristic 

 with the duration of the disease. The red cells are diminished and 



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