DISEASES OP GLANDS 283 



Which structures areinvolved in acute interstitial mammitis? 

 TMs cellulitis, due to infectious agents, attacks the skin, 

 ^bcutis and interglandular connective tissue. 



How does acute interstitial mammitis originate f 



It is either the result of an infection from without— that is, 

 hy a traumatism — or a symptom of parenchymatous mam- 

 mitis. 



What are the clinical symptoms of acute interstitial mam- 

 mitis ? 



The affected quarter is hot, painful, swollen; the parts are 

 firm; fever is present. In the earlier stages, the quality of the 

 milk is unchanged. 



What do you understand by chronic interstitial mammitis ? 



A chronic inflammation of the gland, with connective 

 tissue proliferation and subsequent atrophy of the glandular 

 substance proper. It may either be a sequel to the preceding 

 forms of mammitis, or may represent an idiopathic condition 

 setting in during the period of dryness, as a consequence of 

 which the quarter becomes hard, painless and possibly very- 

 much enlarged. 



What are the peculiarities of purulent mammitis ? 



Parenchymatous and catarrhal mammitis, the result of an 

 infection sufficiently severe to entail suppuration, give rise to 

 abscess formation in the glandular tissue. The milk is mixed 

 with pus; fluctuating spots indicate the abscesses; there is 

 high fever. 



Under what circumstances is gangrenous mammitis ob- 

 served f 



Parenchymatous mammitis due to an infection with very 

 virulent bacteria, may, in the cow, produce such circulatory 



