GENERAL DISEASES. 91 



on the limbs, they are often more uniformly diffused. 

 They terminate abruptly, not shading insensibly away into 

 the surrounding tissues ; they are tense, invariably elevated 

 above the level of the skin, pit slightly on pressure, and 

 are hot and painful. The swellings are due to transudation 

 of blood and serum into the subcutaneous tissue. 



Vesicles, or bullae, of about the size of a pea, appear 

 upon the lower parts of the limbs, around the hock and 

 fetlock joints, and after a time burst and discharge an 

 amber-coloured serous fluid, which scalds and excoriates the 

 surface of the skin over which it flows. 



Cracks and fissures also appear at the flexures of the 

 limbs, and from them issues an unhealthy dark-coloured 

 discharge. 



The swellings about the sheath, abdomen, and breast 

 often disappear from one part in the earlier stages of the 

 disease, and reappear again in another region. 



In many cases the face, lips, nostrils, and eyelids become 

 very much swollen; the swelling ending abruptly about 

 the forehead. 



Death may result from swelling of the head owing to 

 interference with respiration, the swollen nostrils causing 

 great difiiculty in breathing. The animal, also, is prevented 

 from feeding, owing to the swelling interfering with the 

 movements of the tongue and jaws. 



The skin of the swollen parts often sloughs, and large 

 unhealthy sores discharging fetid matter are formed. The 

 lining membrane of the nose becomes more deeply coloured 

 and studded with petechise, which gradually coalesce and 

 become darker in colour. Eventually, the greater portion 

 of the mucous membrane of the septum becomes covered 

 over, and there is a discharge of a sero-sanguineous fluid 

 from the nose. 



Similar blood extravasations probably simultaneously 



