126 MASTITIS OF THE COW 



1. Infected udder-wounds. 



a. Acute wound-infection. 

 Streptomycosis. 

 Staphylomycosis. 

 Colibacillosis. 

 b. Chronic wound-infection. 

 Pyobacillosis. 

 Tuberculosis. 

 Actinomycosis. 



2. Genuine udder-infections. 



o. Acute genuine udder-infections. 



Acute streptomycosis, staphylomycosis, and 

 colibacillosis. 

 b. Chronic genuine udder-infections : 



aa. Atypical chronic udder-infections : 



Atypical chronic streptomycosis (which, 

 together with pyobacillosis and tu- 

 berculosis, complicates acute infec- 

 tions). 

 bb. Typical chronic udder-infections. 



1. With distinct udder swelling. 



Pyobacillosis. 

 Tuberculosis. 

 Actinomycosis. 



2. Without distinct udder swelling. 



Typical chronic streptomycosis. 

 B. Microscopic diagnosis. 



Material for examination. 



Quantity of bacteria in pyobacillosis, tuberculosis and 

 actinomycosis, in acute milk-infections and in typical 

 chronic streptomycosis. 

 Differential diagnosis between streptococci and staphy- 

 lococci. 

 Streptomycosis is the most variable of all the genuine udder- 

 infections since it can have at least three different clinical forms. 



In general a careful examination of the animal, together with a 

 good anamnesis, can enable one to arrive at a comparatively cor- 

 rect diagnosis. 



The length of the course corrects or corroborates our diagnosis. 



