INFLUENCE OF DISEASE UPON MILK 95 
first vigorous, later weak. The respiration is often unchanged, 
but in advanced cases it is usually rapid and labored. Sometimes 
there is a purulent nasal discharge. Percussion does not 
usually give much information ; on auscultation increased vesicu- 
lar murmur, rales, and indefinite sounds may be detected. These 
symptoms are usually accompanied by anxmia, unthriftiness, 
emaciation, dull and sunken eyes, variable or poor appetite, 
diarrhea, repeated bloating after meals, or distention of the ju- 
gular vein. In advanced cases the pulse is accelerated and soft. 
(6) Intestinal Tuberculosis—The symptoms of intestinal 
tuberculosis are not characteristic. Repeated attacks of colic 
and constipation alternating with diarrhea are the most sus- 
picious. The intestinal discharges may be quite fluid and 
frequently contain mucus and pus, sometimes blood. The diges- 
tive disturbances which are nearly always present in advanced 
tuberculosis are usually due to the involvement of the intestines, 
but on the other hand, they may be entirely absent when the 
intestines are tuberculous. 
(c) Tuberculosis of the Uterus.—A turbid, mucous or muco- 
purulent discharge, yellowish or rather ichorous and of foul 
odor, is a constant symptom of tuberculosis of the uterus. Frag- 
ments of caseous material or streaks of blood are sometimes 
present. The cow is sterile and frequently in heat. On rectal 
examination the sacral lymph-glands may be found enlarged or 
the horns of the uterus hard and nodular. 
When the mucous membrane of the vagina or vulva is tuber- 
culous, ulcers or nodules are present, together with a similar 
discharge. 
Enlargement of the superficial lymph glands is an important 
symptom. 
While these symptoms in themselves are not sufficient to 
justify a positive diagnosis of tuberculosis, nevertheless when 
they are presented by an animal in a herd in which tuberculosis 
is known to exist, and when other possible causes for them can 
be excluded, an error will not often be made if the animal is 
regarded as tuberculous. In doubtful cases the tuberculin test 
can be applied or a microscopic examination or an inoculation 
test made. 
