PRINCIPLES OF VETERINARY SURGERY 407 



ored with the haemoglobin. The heart is cooked, discolored, 

 friable and ecchymosed. The pericardium is full of blood 

 serum, and the pleura is injected, ecchymosed, and contains 

 a variable quantity of fluid similar to that of the pericardium. 

 The parenchymatous organs — the lungs, liver and kidneys — 

 are obstructed, the spleen is hypertrophied and the divers 

 organs are friable and infiltrated. The peritoneum is rough- 

 ened, slate-colored and covered with soft adhesions, and it 

 contains a blood serum like that of the other serous mem- 

 branes. 



(b). The Ox. — In the ox^ the lesions are similar to 

 those of the horse. The subcutaneous tissue and the mus- 

 cles around the afifected area are found to be the seat of a 

 sero-hsemorrhagic and emphysematous infiltration. The af- 

 fected region presents characteristics slightly different from 

 those of symptomatic anthrax. In the latter disease, gas is 

 found in large quantities, but it is rather spare in malignant 

 oedema, and the liquid that impregnates the tissues is always 

 of limited quantity. 



Section of the muscles shows them to be black in symp- 

 tomatic anthrax while, on the contrary, in malignant 

 oedema they are livid and blanched. The changes in the 

 serous membranes and the parenchymatous organs are the 

 same as in the horse. 



(c). Swine. — The lesions in porcine species are always 

 very intense. There is a mai'ked gelatinous infiltration of 

 the subcutaneous connective tissue and a considerable 

 thickening of the abdominal wall around the seat of infec- 

 tion. At the seat of castration the surface is purple and 

 the deeper parts are yellowish-green. The intestines are 

 the seat of a violent inflammation and the peritoneum is 

 eroded and overrun with numerous capillaries. The peri- 

 toneal cavity contains a highly colored liquid. In all the 

 lesions the septic vibrion is easily found and it is often as- 

 sociated with a staphylococcus. 



