Non- Venereal Infections which Invade the Genitalia 333 



ing the few succeeding days. When the lesion has reached 

 a certain development, a given copulation, especially with a 

 heifer, irritating the lesion severely, sets aflame the estab- 

 lished infection. Then the lesion is observed, and is natu- 

 rally attributed to mechanical injury referable to the last 

 copulation, though this is only partly true. Then swelling 

 in the preputial region becomes evident, incarceration of 

 the penis follows quickly, and copulation can no longer occur. 



The diagnosis is fundamentally dependent upon symp- 

 toms essentially identical with those seen in sheath tubercu- 

 losis, except that the lesion is located further backward, 

 just anterior to the scrotum. It can not be differentiated 

 from other infections by an ordinary physical examination. 

 Before a technical diagnosis can be made, it is essential to 

 include the tuberculin test and bacterial search. In a breed- 

 ing sense, the lesion is not subject to cure. 



(4) Tuberculosis of the penial lymph glands is by far the 

 most commonly observed type of genital tuberculosis in 

 bulls. Apparently entering through a lesion, either recog- 

 nizable or unrecognizable, of the glans, sheath, or prepuce, 

 it may involve the lymph glands at any point from the mar- 

 gin of the sheath, along the prepuce, and up to and above 

 the sigmoid flexure. Clinically, in opening the small peri- 

 penial abscesses, I find that they contain thick pus, and that 

 the abscess walls are dark, angry red, without calcification. 

 The lymph glands lie chiefly along the sides of the penis. 

 When involving the small glands outside the mucous mem- 

 branes of the sheath and prepuce, the inflammatory adhe- 

 sions soon prevent the reflection of these membranes upon 

 the exterior of the penis, make its protrusion impossible, 

 and exclude copulation. Swellings in the region, usually 

 well defined and painless, are evident. Abscessation gradu- 

 ally develops, but the abscesses are small and their walls 

 sclerotic, non-fluctuant, and without a tendency to "point" 

 or break. The lesions are well illustrated in Figures 96, 97, 

 98 and 99. 



Sometimes the sigmoid lymph glands are involved, while 

 those of the sheath and prepuce are slightly or not at all 



