INFLUENCE OF DISEASE UPON MILK 101 
bacilli and their spores, and the spores may also be 
present in the dust of the stable and in the dust of straw 
and hay from infected fields. The organisms may gain 
access not only to the milk of the affected cow, but also 
to the milk of other cows in the stable. Anthrax bacilli 
and spores entering milk in this way may multiply 
rapidly, as milk is an excellent culture medium for this 
organism. While the bacilli are digested by the gastric 
juice, the spores are not affected and in disturbances of 
digestion the bacilli may also escape destruction. Ernst 
mentions a typhoid fever patient who developed intestinal 
anthrax after drinking milk from a cow with a malignant 
pustule on the udder. 
All milk from a herd in which anthrax is present 
must therefore be regarded as dangerous to man until 
proper precautions are taken to prevent the secondary 
infection of the milk from the cows which are not diseased. 
Diseased and dead animals should be at once removed 
from the stable, which should be thoroughly cleaned and 
disinfected. McFadyean recommends that the tempera- 
ture of every exposed cow be taken each day before milk- 
ing for seven to ten days, and that all those showing a rise 
of temperature be treated as suspicious cases and taken 
out of the stable, the milk not being used. 
RABIES 
Cattle are usually infected with rabies by being 
bitten by a rabid dog. Frequently several animals in a 
herd are infected at the same time. While the virus of 
rabies is to be found in its purest and most concentrated 
form in the central nervous system, it is also present in 
the milk of affected animals as well as in the secretions 
