208 CLINICAL DIAGNOSTICS. 



4. Mastitis tuberculosa. A few nodular enlarge- 

 ments, otherwise the udder is tough and flabby. Supra- 

 mammary glands enlarged. Tubercle bacilli in milk. 



Vesicular eruption [coital exanthema] is an acute infectious 

 vesicular exanthema of the mucous membrane of the vagina and 

 the penis. Period of incubation 3-6 days. The vesicles develop 

 into little ulcers. 



Mai du coit [seen in U. S. in imported stallions]. Period of 

 incubation 8 days to 2 months. Swelling of the vulva and penis, 

 formation of vesicles and ulcers. Frequent attempts to urinate, 

 increased sexual desire, urticariform, swellings of skin, paralysis 

 of hind parts. 



Infectious Catarrhal Vaginitis. A chronic catarrh of the 

 vaginal mucous membrane, frequently extending to the uterus. 

 Very contagious. Incubation period 2-3 days. General health not 

 affected. At first swelling and tenderness of the vulva, frequent 

 urination. Visible mucous membrane of vagina yellowish red, 

 covered with muco-purulent mass. One or two days later, numer- 

 ous milliform, dark red, firm nodules in the region of the clittoris. 

 Later these become pale and transparent. In bulls, simple ca- 

 tarrh without nodules. In cows vesicles, pustules or ulcers never 

 occur. 



II. The Nervous System. 



Diseases of the central nervous system can be recognized 

 only by the disturbed function of its parts, a physical exam- 

 ination of the diseased parts is out of the question. We must 

 therefore subject each function to a careful examination and 

 draw conclusions as to the parts affected from the character 



