DISEASES OE THE HOESE. 537 



lungs and respirator}' tract gorged vrith blood from the extreme use 

 of these organs will develop glanders as the local manifestation of the 

 disease in the respiratory tract. 



The previous reference to the existence of glanders under the two 

 forms more commonly differentiated as glanders and as farcy, and our 

 reference to the various conditions in which it may exist as acute, 

 chronic, and latent, show that the disease may assume several different 

 phases. Without losing sight for a moment of the fact that all of 

 these varied conditions are identical in their origin and in their essence, 

 for convenience of study v;e may divide glanders into three classes — 

 chronic farc}^, chronic glanders, and acute glanders with or without 

 farcy. 



CUEONIC FARCY. 



Si/)nj)coms. — In farcy the sjaiiptoms commence by formation of 

 little nodes on the under surface of the skin, which rapidly infringe on 

 the tissues of the skin itself. These nodes, which are known as farcy 

 "buds" and farcy "buttons," are from the size of a bullet to the size 

 of a walnut. They are hot, sensitive to the touch, at first elastic and 

 afterwards become soft; the tissue is destroyed, and infringing on the 

 substance of the skin the disease produces an ulcer, which is known as 

 a chancre. This ulcer is irregular in shape, with ragged edges which 

 overhang the sore; it has a graj^-, dirt}^ bottom and the discharge is 

 sometimes thin and sometimes purulent; in either case it is mixed with 

 a viscous, stick}^, yellowish material like the white of an egg in con- 

 sistency and like olive oil in appearance. The discharge is almost 

 diagnostic; it resembles somewhat the discharge which we have in 

 greas}^ heels and in certain attacks of lymphangitis, but to the expert 

 the specific discharge is characteristic. The discharge accumulates on 

 the hair surrounding the ulcer and over its surface and dries, forming 

 scabs which become thicker by successive deposits on the under surface 

 until they fall off, to be replaced by others of the same kind; and the 

 excess of discharge may drop on the hairs below and form similar 

 brownish yellow crusts. The farcy ulcers may retain their specific 

 form for a considerable time — days or even weeks; but eventually the 

 discharge becomes purulent in character and assumes the appearance 

 of healthy matter. The surface of the gangrenous bottom of the ulcer 

 is replaced b}'' rosy granulations, the ragged edges are beveled off, and 

 the chancre is turned into a simple ulcer which rapidly heals. 



The farc}^ buttons occur most frequently on the sides of the lips, 

 the sides of the neck, the lower part of the shoulders, the inside of the 

 thighs, or the outside of the legs, but may occur on an}^ part of the 

 body. 



We have next an irritation of the 13'mphatic vessels in the neighbor- 

 hood of the chancres. These become swollen and then indurated and 



