0) 
Farinrrs* Bulletin liU). 
is continually in a state of erection. There may also be a discharge 
similar to that observed in the stallion, and it may be profuse or 
sliirht in quantity. The mare will switch the tail, appear uneasy, 
and urinate frequently. Vesicles or blisters soon appear on the ex- 
ternal genitals as well as on the internal lining of those organs. The 
blisters soon rupture, which is the initial stage in the formation of 
deep, angry ulcers, which show a tendency to heal rapidly, invariably 
leaving a permanent scar and causing a slight puckering of the tissue. 
On the dark skin of the external genitals these scars are always 
Fig. 2. — A chronic case of dourine. (Same stallion as sliown in fig. 1 after the 
disease had developed.) 
white, more or less circular in outline, from one-eighth to one-half 
inch in diameter, and pitlike, similar to the depression in a pock- 
mark. (See fig. 3.) These marks are permanent and not tempo- 
rary as in coitial exanthema and other affections resembling it. 
Swellings in the region of the genitals and the mammary glands 
frequently occur. 
Sometimes the lesions described disappear gradually and the 
disease may remain in abeyance for months or even years. The 
apparent recovery, however, as a rule, is not permanent, and any 
excessive work or excitement, especially copulation, may set up the 
disease anew. Mares may abort during pregnancy, but many fine 
colts have been born to affected mares. 
The nervous or constitutional disturbances of the second stage may 
not come on for months or even years after the appearance of the 
local lesions, and are similar in both male and female. They consist 
of a general nervous disorder with a staggering, swaying gait, espe- 
