o02 CONTAGIOUS DISEASES. 



are due to a profound modification which has been established 

 in the physical and chemical characters of the blood. 



In the horse more particularly, the jelly-like yellow and sero- 

 hsemorrhagic infiltrations are encountered nearly everywhere in 

 the body where there is loose connective tissue, chiefly in the 

 retro-pharyngeal and laryngeal tissues, along the course of the 

 great blood-vessels of the neck, in the mediastinum, peritoneum, 

 and about the kidneys. The corresponding lymphatic glands, 

 especially the mesenteric, show sero-heemorrhagic infiltrations, 

 are considerably enlarged, and here and there in a state of 

 incipient gangrene. The intestinal lesions in the horse are for 

 the most part not so diffusely spread ; but still upon the mucous 

 membrane, which is in a catarrhal state, oedematous, and 

 sprinkled with ecchymosis, there are found well pronounced 

 carbuncles, which are the seat of more or less superficial sloughs. 

 The intestinal contents are likewise often bloody and thinly 

 fluid. The large glands, liver, and kidneys as a rule are swollen, 

 the parenchyma cloudy, succulent, and full of blood. In the 

 blood, besides the presence of bacteria, the white corpuscles 

 are found to be in considerable number. The red corpuscles for 

 the most part are of lessened consistence, and manifest a ten- 

 dency to cohere in little heaps. On microscopic examination of 

 the carbuncles in the intestines, as well as elsewhere, and of the 

 jelly-like haBmorrhagic effusion into the connective tissue, there 

 are found in the capillaries, which are considerably diluted, 

 besides a massing of white blood corpuscles (cellular oedema), 

 numerous bacteria, and a finely granular mass, consisting partly 

 of metamorphosed blood detritus, and partly bacterial germs. 

 The thickness of the blood is due to its being deprived of water 

 by the dropsical, jelly-like, and oedematous effusions. The dark 

 colour is caused by carbonic acid poisoning. — (Bollinger.) 



teeat:\ient. 



"When the symptoms of the disease, in any of its forms, are 

 fully developed, but little good can be effected by medical or 

 surgical interference. Some few cases may, however, be amen- 

 able to treatment. 



The blood is fluid, dark, imperfectly coagulated, containing the 

 constituents which unite to form fibrin in a diminished quantity, 



