756 



Diseases of the Genital Organs 



upon the penis and may extend to the prepuce, sheath and 

 scrotum. In studying this symptom, it is well to bear in 

 mind that in gray horses and in those having white eyes, 

 faces or feet, it is quite common to observe an absence of 

 pigment on the penis, but this is regular in outline, whereas 

 in dourine the depigmentation spreads out in patches. 



In the mare, about eight to ten days after infection there 

 appears a well marked swelling of the lips of the vulva. The 



Fig. 224 — Dourine showing' Penial Paralysis. (Baldrey. ) 



mucous membrane of the vulva and vagina is intensely in- 

 jected and swollen, and from the vulva there escapes a more 

 or less profuse discharge of a mucous or muco-purulent 

 character, which soils the tail and surrounding parts. The 

 mare urinates frequently in small quantities, which causes 

 pain as indicated by straining, stamping with the feet, and 

 switching of the tail. 



There seems to be an increased sexual excitement, which 



