280 PBiNorPLEa of tetebinaby buegeet 



acute inflammatory symptoms recede, but the milk remains 

 changed in composition and quantity and the gland becomesi 

 more or less indurated. In these cases complete resolution, 

 may take place during the next period of dryness, although, 

 this seems impossible on account of the connective tissue 

 proliferation which has occurred. 



2. Purulent inflammation. Purulent inflammation and. 

 abscess formation may take place in the subcutaneous connec- 

 tive tissue ; also in the interglandular, interlobular and inter- 

 stitial connective tissue ; no matter which of these is affected, 

 the glandular tissue proper — that is, the parenchyma — is- 

 always involved. Depending on the structures involved, 

 mammitis may be catarrhal (when the mucous lining of the* 

 excretory ducts is mainly involved), or there may be a phleg- 

 monous mammitis (when the septic process spreads in the con- 

 nective tissue framework), etc. Abscesses may be located, 

 deeply, and in these cases they usually empty into a lactifer- 

 ous duct and give the lacteal secretion — that is, the milk — a. 

 purulent appearance, at the same time producing a purulent- 

 catarrh of the gland and its excretory ducts. But such an_ 

 abscess may not break but become encapsulated, or the lacteal 

 secretion mixed with pus remains in a lactiferous duct and 

 inspissates ; in either instance, hard, rather circumscribed 

 lumps, deeply located in the udder,, are felt. Abscesses super- 

 ficially seated — that is, in the subcutaneous tissue — evacuate- 

 into the external world. 



3 . Atrophy of the glandular substance proper. This is a. 

 common termination of mammitis, usually accompanied with 

 induration of the affected parts. In these cases, a chronic in- 

 flammation exists, as a result of which the interstitial connec- 

 tive tissue becomes hyperplastic and the glandular tissue 

 proper atrophies. This may occur in a limited area or may 



