iv TRANSLATOR'S PREFACE 



rhagic mastitis, croupous mastitis, purulent mastitis, or 

 croupo-purulent mastitis. These terms indicate the pres- 

 ence of an inflammatory process of the udder in which the 

 parenchyma is affected with various degrees of severity, 

 which are distinguished by the character of their exudates. 



In the acute form of these types of parenchymatous 

 mastitis, except the catarrhal type, the udder becomes 

 swollen, hot, painful and more or less hard and there is a 

 rather rapid diminution in the milk secretion. In catarrhal 

 mastitis the milk becomes more or less altered and not much 

 decreased, but the udder manifests few, if any, changes. 



Because of these clinical differences the clinician, for 

 convenience, recognizes catarrhal mastitis separately as 

 the same process just indicated by that name, but under 

 the collective head of parenchymatmis mastitis he includes 

 sero-hemorrhagic, croupous, purulent and croupo-purulent 

 mastitis which show hot, painful swellings and rapid dimi- 

 nution in milk secretion. In addition he recognizes inter- 

 stitial mastitis and gangrenous mastitis, which complete his 

 classification, i.e., catarrhal mastitis, parenchymatous maS' 

 titis, interstitial mastitis, and gangre^ious mastitis. 



By use of the terms udder-infection, stroma-infection, 

 and milk-infection (parenchyma-infection) in lieu of mas- 

 titis, interstitial mastitis, and parenchymatous mastitis re- 

 spectively, terms with which we are more familiar in this 

 country, the author keeps uppermost in the student's mind 

 the fact that the actual presence of the bacteria in the vari- 

 ous parts of the udder, and the primary lesions produced by 

 their harmful influence, are the fundamental factors to be 

 overcome. Not only are they to be overcome by the scien- 

 tific application of prophylactic, medicinal and surgical 

 remedies by the veterinarian, but mastered by elimination 

 of the causative agents, the bacteria, and repair of the pri- 

 mary lesions induced by them, through the agency of that 

 complex reparative process of the body called an inflamnin- 



