352 
GANGRENOUS CORVZA. 
falls away, the belly is tucked up, diarrhoea sometimes follows* 
and the animal usually dies in the course of five or six days. 
At the post-mortem examination, the muscular surfaces cor¬ 
responding with those parts of the body on which the eruptions 
had appeared, are red, covered with a purulent inodorous mat¬ 
ter, sometimes bloody. The gastric and intestinal mucous 
membrane is more or less red, injected, and softened. These 
traces of inflammation are sometimes limited to the stomach; 
sometimes also they are seated on isolated portions of the small 
or large intestines. The kidneys are often softened and pale; 
the liver is frequently voluminous, and destitute of its natural 
colour; the pleurae are injected ; the lungs, gorged with black 
blood, and frequently containing cavities with thick parietes, 
filled with pultaceous matter, are often covered with deposits of 
puriform and fibrous matter more or less condensed. The 
larynx, the pharynx, and the bronchiae, are often reddened, 
thickened, and covered with gangrenous sloughs. In many of 
the carcasses the heart is softened, and its tissue discoloured. 
The nasal membrane is always red or yellow, more or less infil¬ 
trated and covered with ulcerations; and gangrenous sloughs are 
more or less multiplied. 
Among the numerous causes of this affection, the first is the 
keeping of the animals in infected air, in badly ventilated, damp, 
or low stables, where they are exposed to the injurious influence 
of animal and vegetable substances in a state of putrefaction, 
the use of bad food, &c. It is said that, in some cases, sudden 
change from poor to abundant food, and the sudden changes of 
the seasons, have materially influenced its appearance. It. may 
be developed spontaneously both in healthy animals, and in 
beasts already attacked by chronic diseases of the respiratory 
passages (rhinitis, chronic pneumonia, and pulmonary and nasal 
phthisis). 
The matter which runs from the nose of a diseased horse is 
capable of producing the same malady in a healthy one, after its 
inoculation on the pituitary membrane. This contagious affection 
is also as readily communicated to animals which have been pre¬ 
viously attacked by scirrhous or tuberculous diseases of the nasal 
membrane and the lungs, as to those which are not so affected. 
Two opposite modes of treatment have been pursued against 
this affection—the antiphlogistic and the stimulating. Bleedings 
from the jugular, emollient fumigations, setons and blisters on 
the cheeks, and at the back of the ears; diet, mucilaginous 
drinks, and clysters of the same nature, have not been found to 
be more successful than stimulating substances and tonics (pow¬ 
dered gentian, alder, wine, acetate of ammonia) in drinks ; and 
