326 Diseases of the Genital Organs 



The superficial genital mucosa of the bull, as well as that 

 of the ram and the boar, is further exposed to abrasions and 

 consequent infection by the presence of the granules or 

 nodules of the granular venereal disease — a chronic infec- 

 tion which is essentially universal. The granules or nodules 

 frequently become inflamed, especially from excessive coitus, 

 the epithelium at the summits of the granules becomes 

 abraded, and hemorrhage ensues. It is not rare to see the 

 granular venereal disease so severe that the parts bleed 

 after each coitus, if the bull will copulate. Sometimes the 

 pain is so great that he refuses to copulate; sometimes the 

 swelling of the sheath is so great that the penis can not be 

 protruded — the bull has phimosis. 



Therefore, in addition to the very delicate epithelium of 

 the genital mucosa, the prepuce itself may be ruptured, or 

 a multitude of minute abrasions may occur at the summits 

 of the granules regularly present. These abrasions offer 

 special facility for invasion by pathogenic bacteria. If the 

 cow is afflicted with tuberculous genital catarrh, any abra- 

 sions existing upon the penis, prepuce, or sheath of the bull, 

 or occurring at the time of copulation, invite tuberculous 

 infection. The entire group of such tuberculous infections 

 may be classed as primary venereal or coital tuberculosis. 

 Primary tuberculosis of the copulatory organs of the bull 

 may involve any tissue or part contributing to the copula- 

 tory apparatus. The principal types I have observed are: 



(1) Tuberculosis of the glans penis, 



(2) Sheath tuberculosis, 



(3) Preputial tuberculosis, 



(4) Tuberculosis of the penial lymph glands. 



(1) Tuberculosis of the glans penis is not very rare. I 

 have observed two cases clinically, and others in the abat- 

 toir. One clinical case was in a large Holstein herd bull. 

 For some months, he had been unable to copulate with small 

 or medium-sized cows, but could do so successfully with 

 large cows with commodious vulvae. Attempts at copula- 

 tion were generally followed by a limited amount of hemor- 

 rhage. The glans penis was enlarged, especially at its apex. 



