150 MASTITIS OF THE COW 



of Gram positive cocci in long chains were found (strep- 

 tococci). 



B. STAPHYLOMYCOSIS 



1. Staphylomycosis of the right half of the udder as well 

 as the left anterior quarter. Diffuse necrosis of the udder. 



The cow had to be slaughtered. 



The right half of the udder as well as the left anterior 

 quarter were greatly swollen and hard. 



The lymph-glands were slightly swollen. The incision 

 was succulent with lymph and the cut surface was gray, 

 moist and friable (oedema). The diseased parts of the 

 udder presented the same lesions. The incision was juicy 

 with a dark red, thin fluid. The cut surface was even 

 and diffusely colored red. The consistency was firm and 

 friable, the structure indistinct and no milk points were 

 present. Red fluid was expressed. Here and there dark 

 red-colored, sharply defined parts were observed (blood 

 infiltration). Nimierous veins were occluded by firm 

 thrombi. Red-stained fibrin cylinders and a thin fluid were 

 observed in the milk canals and in the cisterns. The loose 

 subcutaneous tissue over the udder was swollen, red stained 

 and of gelatinous consistency. Red fluid was expressed 

 from it. No lesions were found in other parts of the udder. 



In the liquid of the incision a great number of Gram 

 positive, uniformly round cocci, arranged in twos or in 

 small bunches, were observed (staphylococci). The diag- 

 nosis was corroborated by cultures. 



2. Staphylomycosis in the left half of the udder. Diffuse 

 udder necrosis with gangrene. 



The cow had to be slaughtered. 



The left half of the udder was greatly swollen and of 

 firm consistency. The left anterior teat was red and greatly 

 swollen. The corresponding lymph-gland was slightly 

 swollen. 



