86 



DISEASES OF SWINE AND OTHER ANIMALS. 



and CYcu the scat of microscopic extravasations of blood, wMle in some cases the 

 black necrotic cuticle is covered by a dried cnist of oxniled lympli of a dark brown 

 color. 



The right ear is of a deep pnrjdo color, and purple iiatcbes of various sizes are found 

 inside forearms and thighs, on the hocks, and beneatli the chest. In thego purple patches 

 the true skin is the seat of extensive congestion with stagnation and coagulation of 

 the blood in many of the capillaries, and numerous microscopic clots of extravasated 

 blood, v.'hilo all the tissues are stained "with h;i;inatino. 



Blood: That from the jugular is very dark and forms slowly a soft diffluent clot; 

 red globules round and large. That from the carotid is crimson, and clots quickly and 

 lirmly; red globules crenate, small and shrunken. Blood from both vessels is slightly 

 alkaline. 



Tongue: On tlie posterior third of the right border is a x^uiiile spot one-haK line in 

 diameter, which cannot bo eliaced by pressure. Under the microscope this shows the 

 same congestion and microscopic extravasations with the spots on the skin. The 

 conical papilla; (m the upper surface of the organ near its base have their tips of a 

 very deep purplish red. 



Larynx : There is purple punctiform discoloration on the i^osterior surface of the 

 epiglottiSj whicli cannot be removed by pressure. 



Lympliatlc glands : Those around the throat are deeply stained with blood, some only 

 superficially and some throughout. This is true also of the glands of the chest, groin, 

 and abdomen, but especially of the mesentery. In several cases the glands appear to 

 be enlarged. Microscopically, tliey i)resent congested capillaries filled with coagulated 

 blood, minute extravasations, and a iirofusion of granules and granular cells. 



Abdomen — j)arasUes in peritoneum : Two hydatids were found respectively in the omen- 

 tum and mesentery. 



Stomach: Well"filled; great curvature of a deep dark red; contents strongly acid. 



Small intestine: Congested in some parts, but with, no observed extravasation nor 

 deep discoloration ; contents iiot abxmdant, but at intervals stained of a deep biliary 

 yellow, and with excess of mucus throughout. 



lUo-coical valve : With Peyer"s follicles dilated, and contents in some slightly yel- 

 lowish. 



Ccecum: Close to tbe ilio-ca;cal valve a considerable erosion, with raised center and 

 margin, but no excess of vascularity. 



Colon: Six inches from the caecum is a sloughing ulcer, one and one-half lines in 

 diameter, raised above the adjacent membrane, the superficial layers being of a dirty 

 white color in the center, and non- vascular, while around the margin of the ulcer is 

 no marked redness. 



Livff)\ colon, and rectum : Several extravasation patches averaging one lino in diam- 

 eter, bright red, and evidently quite recent. 



No intestinal parasites. 



Liver: Firm; solid; considerable portions are of a deep purple hue, the deep color- 

 ation being mostly confined to the center of the acini. 



Kidneys: Cortical portion soft and of a very light brown, almost parboiled, appear- 

 ance. Papilla} and medullary parts of a very deep red. 



Muscles: Contained noparasites. 



Brain: Normal. 



[Experiment:' No. 9. 



Female 2)ig, eight wceJcs old ; breed, Chester White. 



