Animal Diseases. 267 



2. In cases which Hve for a day or two longer than the more 

 highly susceptible animals it is common to find congested lobules of 

 a dark, almost black colour. These lobules are sharply defined 

 from those immediately adjoining, and from their somwhat super- 

 ficial resemblance to the appearance seen in Pleuro-pneumonia, 

 such cases are caned by the farmers Black Lung-sickness. 



3. In some cases one finds extravasations of blood below the 

 endocardium of the left ventricle, especially in relation to the attach- 

 ment of the chordeae tendineae. 



4. The liver is commonly congested and enlarged, and, in the 

 last stages, the gall bladder is distended. The bile is of a deep 

 green colour as a rule, but in some cases is brown. When the 

 quantity of bile is very small, it may be of a somewhat syrupy con- 

 sistence, but never shows the peculiar tenacious mucous character so 

 well known in Texas Fever. 



5. The small stomach is frequently the seat of patches of con- 

 gestion, more or less of a red colour, which may even have gone on 

 to active inflammation. 



6. The conditions seen in the stomach may be found fre- 

 quently in the intestines, and a general gastro-enteritis may even be 

 set up. 



7. The spleen may be slightly enlarged, but is firm in consist- 

 ence. The malpighian bodies are more prominent than in the normal 

 condition. 



8. A slight amount of yellow serous exudation may be found 

 sometimes in the pelvis of the kidney ; otherwise the organ is normal. 



9. In even the best marked cases the urine and the bladder are 

 commonly absolutely normal. 



10. In cases which have been dead for some time and exposed 

 to a hot sun there may be some patches of emphysema in the lungs. 



On examination of the blood and of smears from the kidneys 

 and liver no micro-organisms are to be found except in animals 

 which have been dead for some hours, when a large putrefactive 

 bacillus is frequently to be found. 



The blood is always of a good colour, and the rapidity of coagu- 

 lation is always increased. 



The fever in these cases is commonly very high. A remarkable 

 feature in the malady is the fact that animals may seem in perfect 

 health, yet when the temperature is taken it may be found to be 

 over 106 F. 



It is common to find animals showing symptoms of illness only 

 a few hours before death. 



As this disease is well defined in cattle, and runs on parallel 

 lines with Horse-sickness in horses, I suggest that it should be 

 denominated " South African Cattle-sickness." 



While the blood of the first ox proved virulent to an ox, I found 

 after three transferences through oxen that it becomes relatively 

 virulent to the ox, but may fail to produce virulent disease in the 

 horse even when used in the fresh state. 



