6o , SWINE PI^AGUE 



skin. On section they present a mottled gray and red surface, the red 

 limited chiefly to the cortex. Oedema of the subcutis over right knee. 



False membrane covers the left half of the mass of intestines and 

 the spleen ; consists of an elastic, rather firm yellowish white layer. 

 Spleen firmly glued to the surrounding intestines, slightly enlarged, 

 dark, softened. Liver firm, cuts with considerable difficulty. Kidneys 

 in condition of parenchymatous degeneration. One hemorrhagic spot in 

 medullary portion of the kidney. Pelvis contains a whitish glairy 

 liquid. 



Digestive tract. Two superficial necroses on the inner surface of 

 lower lip in front, one on the upper lip and on edge of tongue near tip. 

 Stomach contains a little deeply bile-stained fluid. Mucosa sprinkled 

 with red spots of a washed-out appearance, most numerous in fundus 

 and near pyloric valve. Hyperemia of duodenum begins sharply at 

 pyloric valve. From the opening of bile duct a few drops of thick bile 

 can be expressed. Remainder of small intestine not markedly changed. 

 The Peyer's patch in lower ileum has some of its follicles enlarged from 

 which caseous masses can be expressed. 



Large intestine contains much sand and gravel. Mucosa of CEecum 

 of a dark slate color. The summit of the folds of a purplish hue. Free 

 edge of valve bordered by a thin slough. On Peyer's patch near valve 

 areas of necrotic tissue of a yellowish color, resting on a firm, yellowish- 

 white base three-sixteenths of an inch thick. Upper colon has its 

 mucosa of the same dark slate color, merging into a wine red. Two 

 ulcers one-eighth of an inch in diameter observed. In lower colon con- 

 gestion slight and gradually disappearing towards rectum. A small 

 number of circular whitish erosions, apparently- associated with the 

 solitary' follicles. 



Thorax. Of the left lung, the ventral and cephalic lobes are inter- 

 spersed with small regions of collapse. The remainder of the lobes verj- 

 emphysematous and hyperjemic. Of the right lung, the anterior half 

 (i.e., including cephalic, ventral, and adjacent portion of principal 

 lobes) hepatized, covered b}' a thin false membrane, gluing the various 

 lobes lightly to each other and to chest wall. The diseased lobes show 

 the regular mottling in the upper, dorsal portion. As we proceed 

 towards the ventral portion the mottling is less distinct, the tissue firmer 

 and interspersed with small, irregular, necrotic foci. The smaller bron- 

 chi contain a thick, whitish pus. In veutral lobe a portion of the par- 

 enchyma as large as a marble completely converted into a grayish- 

 yellow hemogeneous mass. Of the principal lobe about one-third or 

 one-fourth hepatized. The mottling of surface verj' regular. On sec- 

 tion graj'ish, circumscribed areas one-half an inch in diameter inter- 

 spersed. Over these masses the pleura is converted into a wrinkled, 

 roughened, hide-like membrane. 



Trachea and bronchi contain small quantities of foamy liquid inter- 

 mingled with yellowish particles. Bronchial glands barely enlarged, 

 firm ; some lobules pale, others reddened. 



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