784 Diseases of the Genital Organs 



several days or weeks, and then slowly abates. The glands 

 do not ordinarily recover in volume or function. The prog- 

 nosis for the life of the animal is highly favorable, but for 

 the reproductive functions is usually hopeless. 



As will be seen in Figs. 226 and 227, the gross changes 

 consist chiefly in atrophy of the testicle and hypertrophy of 

 the epididymis, so that the ordinary relationship in volume 



Fig. 227 — Orchitis and Epididymitis. 



/, Epididymis; 2, parenchyma of gland ; 3, hemorrhage in epididymis; 



/, hemorrhage in testicle. 



of the two structures becomes reversed. In the early stages, 

 as shown in Fig. 227, prominent hemorrhage may occur. 

 The infection extends to the peritoneal covering, by con- 

 tiguity involves the parietal peritoneum of the scrotum, and 

 causes adhesions between the two layers. Histologic.' and 

 biologic studies have not been made in sufficient degree to 

 permit of any conclusions. The colon-like organism ordi- 

 narily alleged to cause abortion in mares may logically be 

 considered as a common cause. At least it is fair to assume 



