Tin Nodular Venereal Disease 291 



more or less completely over the surface of the nodules, so 

 that some of them appear as bright red elevations or as 

 petechiae on the vulvar mucosa. 



The mucosa itself, between the nodules, becomes involved 

 and is injected, red, and swollen. With the advent of defi- 

 nite irritation of the vulvar mucosa, a slight muco-purulent, 



Fig. 82— Vulva of Heifer fed in ordinary manner as a Calf, 

 Showing Matting and Staining of Vulvar Tuft. 



vulvar discharge ensues. It is not at first marked. Many 

 say it is not present, or rather that the discharge noted is 

 normal. There is, however, a visible discharge which so 

 mats together the vulvar tuft and surrounding hairs in the 

 heifer calf that, in opening the vulva for inspection, the ex- 

 aminer must frequently break down the adhesions between 

 the surrounding hairs before the vulvar lips may be parted. 

 Some contend that this is normal, but in experiment heifer 



