154 MASTITIS OF THE COW 



area was uniform, and the superior part of it was irregular, 

 nodular or coarsely granular. The lobuli in this region 

 showed no milk points, but here and there, especially in the 

 lower part, a number of small, yellow caseous points or fine 

 caseous streaks (caseous necrosis in the collecting tubules) 

 were present. Yellow creamy fluid was expressed (soft- 

 ened necrosis ) . The superior and greatest part of the cut 

 surface was strongly convex, whitish-gray and of very soft 

 and elastic consistency. The lobuli of this area were en- 

 larged, strongly convex and showed distinct white milk 

 points. Milk-ducts and cisterns contained milk. Other 

 parts of the udder showed no lesions. 



A number of fine acid-fast rods were found in the yellow 

 cream-like fluid (tubercle bacilli). 



2. Tuberculosis in the right posterior quarter. Ad- 

 vanced tuberculosis with calcification. 



The right posterior quarter of the udder was greatly 

 swollen and hard. 



The corresponding lymph-gland was greatly enlarged. 

 Its incision was juicy with lymph and the cut surface showed 

 a number of yellow caseous points and yellow branched 

 caseous streaks in the cortex which often showed whitish- 

 yellow calcareous centres. 



The incision in the diseased quarter was dry and gritty. 

 Cut surface even and firm. Its superior portion was irregu- 

 lar and nodular. The lobuli of this area showed no milk 

 points, but small yellow caseous points or caseous streaks. 

 Caseous cylinders were expressed. The inferior part of 

 this area was uniform, grayish-yellow and dry. The lobuli 

 of this area presented no milk points, but numerous thickly 

 placed yellow caseous points and caseous streaks. Other 

 lobuli were entirely yellow and showed yellowish-white cal- 

 careous centres or calcareous streaks. At numerous points 

 yellow, firm caseous foci showing yellowish-white cal- 

 careous streaks were found which were surrounded by a 



