489 



completely destroy tlie vitality of the part, and brown and then black 

 masses of slough appear, to be eliminated and leave a deep rosy ulcer 

 in their place. This is more common in the nose and under the tongue. 



Excessive swelling of the head. — The swelling of the head may increase 

 and extend outside to the throat or to the nostrils until the latter are 

 closed, or to the larynx, which is so pressed upon as to render respira- 

 tion difficult or impossible. The same complication renders mastication 

 'and deglutition equally difficult. 



Metastasis. — This is a frequently dreaded complication. If the trouble 

 has originally been in the legs and belly it may suddenly commence to 

 appear in the head, and disappear from the part first affected, or the 

 opposite more favorable change sometimes occurs, the dangerous swell- 

 ing of the head disappearing to attack the belly or legs. 



Enteric oedema. — The effusion on the exterior may take another course 

 and pass to the intestine, causing symptoms of colic, which either ends 

 fatally or more rarely terminates by a profuse diarrhoea, which is some- 

 times hemorrhagic in character. 



Pulmonary oedema. — Marked dyspnoea, without swelling of the head, 

 is indicative of metastasis into the parenchyma of the lungs, which will 

 rapidly show dullness on percussion and tubular murmurs on ausculta- 

 tion. The tumefaction leaves the exterior and attacks the lungs, and 

 the animal dies of asjihyxia. 



Septicaemia. -Th^vQ is certainly no disease in veterinary practice 

 which offers a more favorable field for the development of septicaemia. 

 The large mass of colloid matter held at the temperature of the animal 

 body could not be surpassed in the gelatine tube of bacteriological lab- 

 oratory as a nutriment for the putrefactive ferments. Septicaemia is 

 ushered in by general rigor, sudden elevation of temperature, and 

 marked symptoms of coma. 



TERMINATIONS. 



Resolution. — The simple form of the disease most frequently termi- 

 nates favorably on the eighth or tenth day by absorption of the effusion, 

 with usually a profuse diuresis, and with or without diarrhea. The ap- 

 petite remains good or is at times capricious. The surface of the body 

 is dirty from desquamated epithelium, and at times there is a complete 

 loss of hair, giving the appearance of a bad case of sarcoptic mange. At 

 other times the absorption is slow, lasting for some weeks with tendency 

 to relapses. Again there may be left some permanent induration, the 

 result of embryonic growth. 



Death. — Death may occur from mechanical asphyxia, produced by 

 closure of the nostrils or closure of the glottis. Metastasis to the lungs 

 is almost invariably fatal, causing death by asphyxia. Metastatis to 

 the intestines may cause death from pain, enteritis, or hemorrhage. 



Excessive suppuration^ lymphangitis, and gangrene are causes of a fatal 

 termination by exhaustion. Mortal exhaustion is again produced by 

 inability to swallow in cases of excessive swelling of the head. 



