536 



it carried to various parts of the body and developing in tlie most 

 favorable localities. The points of development are most frequently 

 determined by the activity of the circulation and the effects of exterior 

 irritants. For example, if a horse which has been so slightly affected 

 with the virus of glanders that no symptoms are visible is exposed to 

 cold, rain, or sleet, or by the rubbing of the harness on the body and 

 the irritation of mud in the legs, the disease is apt to develop on the 

 exterior in the form of farcy, while a full-blooded horse which is 

 employed at speed and has its lung and respiratory tract gorged with 

 blood from the extreme use of these organs will develop glanders as 

 the local manifestation of the disease in the respiratory tract. 



Chronic farcy. — In farcy the symptoms 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 gray, dirty bottom 

 and the discharge is sometimes thin and sometimes purulent; in 

 either case it is mixed with a viscous, sticky, yellowish material like 

 the white of an egg in consistency, and like olive oil in appearance. 

 The discharge is almost diagnostic ; it resembles somewhat the dis- 

 charge which we have in greasy heels and in certain attacks of lym- 

 phangitis, 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 by rosy 

 granulations, the ragged edges beveled off, and the chancre is turned 

 into a simple ulcer which rapidly heals. 



The farcy 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 at any part of the body. 



We have next an irritation of the lymphatic vessels in the neigh- 

 borhood of the chancres. These become swollen and then indurated 

 and appear like great ridges underneath the skin; they are hot to 

 the touch and sensitive. The cords may remain for a considerable 

 time and then gradually disappear, or they may ulcerate like a farcy 

 bud itself, forming elongated, ii-regular, serpentine ulcers with a 



