Symptoms. 



825 



is white or yellowish and slimy, later more tenacious and finally 



purulent, dirty yellow, or reddish, dries on the lips of the vulva 



to dirty brown crusts and glues the 



hairs of the tail together. The 



edematous swelling may extend to 



the udder and the abdomen, as well 



as to the thighs. 



During the development of the 

 local changes the mares manifest 

 oestrum-like behavior, they shift 

 their feet restlessly, swing their 

 tails, strain frequently to urinate, 

 sometimes passing only a little 

 mucus and at other times a small 

 quantity of urine after which they 

 arch the back. 



The symptoms do not always 

 reach so high a degree that atten- 

 tion may be attracted to their pres- 

 ence. Cases are relatively frequent 

 in which the characteristic changes 

 are only observed in the later 

 stages, when by subsequent careful 

 examination the traces of the pre- 

 existing ulcerative processes ma}^ 

 be found on the genitals in the form 

 of white scars. If however nodules 

 and ulcers develop only on the 

 mucous membrane of the urethra, 

 as sometimes occurs in stallions, 

 not even traces of the local affec- 

 tion may be found on the genital 

 organs. The initial s>anptoms are 

 sometimes unnoticed, especially in 

 mares in breeding establishments, 

 but carefully watched stallions may direct the attention to the 

 affection by the appearance of the nervous symptoms. 



Fig. 145. Dourine. Unpigraent- 

 ed spots on the lips of the vulva; 

 proiiomiced emaciation. 



The ulcers on the vaginal mucous membrane are described by all 

 authors, with the exception of Rodlofif, who never observed them. Mares 

 observed a discharge from the vagina only in 17 out of 197 affected 



In the second stage, which, as a rule, follows the first after 

 several weeks, and sometimes after a temporary improvement, 

 exceptionally however without any period of transition, symp- 

 toms appear which partly indicate an affection partly of the 

 skin, partly of the peripheral nerves and the intervertebral 

 gangha. 



The so-called dollar spots appear first, usually on the sides 



