82 REPORT ON DOURINE. 



Stallions, The primary changes usually commence within 10 

 to 29 days after covering an infected mare. These may be so little 

 marked that, unless careful and daily examinations are conducted, 

 the symptoms may escape notice. These consist of infiltration of 

 the penis, particularly observable towards the free end of the organ, 

 during erection. The urethral mucous-membrane is inflamed and 

 sooner or later protrudes slightly from the " meatus-urinarius " and 

 assumes a semi-globular form, the colour at first being red or rose- 

 pink. The m. m. covering the surface of the penis in some cases 

 may be marked red and white and present erosions or ulcers on its 

 surface, discrete or more or less confluent, but this condition is 

 neither constant nor necessary, and may be looked upon in many 

 instances as the result of secondary infection. When the organ is 

 in a state of complete erection, the glans-penis acquires a volume so 

 great that its return is accomplished with considerable difficulty, if 

 at all. Consequently, paraphymosis may follow and the same has 

 been observed to become more or less persistent in some cases and 

 exist up to and at the time of death several months later. The 

 manifestations of the symptoms in the male are most uncertain, 

 lying dormant for long periods and only lighting up after the ani- 

 mal has been subjected to and influenced by some depressing condi- 

 tions, for the most part by fatigue brought about from whatever 

 cause. The sheath thea becomes the seat of an cedematous swell- 

 ing, which may be the only one present during a series of months, 

 or this symptom may be the very first to be recognized. Later, 

 the swelling extends to the umbilicus and frequently behind to the 

 scrotum, and in advanced cases swelling and oedema of the under- 

 surface of the abdomen may occasionally extend forward to the 

 sternum and present inordinate proportions especially in imported 

 breeds of horses as English and Australian. In the majority of 

 cases the testicles remain healthy, while in others the testicles and 

 spermatic corJs are swollen and extremely tender on manipulation. 

 There may be a frequent desire to micturate, which is only accom- 

 plished after considerable discomfort and straining, and -sexual 

 excitement is most marked at frequent intervals. At this time also 

 the inguinal glands and lymphatic vessels may become involved and 

 noticeable on palpation. During the fir*\period in the stallion, it 



