TUBERCULOSIS IN CATTLE. §3 
each other, but did not require the building of any new cattle 
stalls. 
6. These two herds, after the separation, must be kept 
absolutely isolated from each other. They are never allowed 
to come together, never allowed to drink out of the 
same troughs, and, so far as possible, are attended by dit- 
ferent attendants, so that persons going from the infected herd 
can have no chance for carrying the disease into the healthy 
herd upon his boots or clothing. The animals are used as 
usual, but the milk from the reacting herd is, as a rule, steril- 
ized before being used. 
7. The calves which are born from animals in the reacting 
herd are, after the first three days, separated from their mothers 
and are brought up wholly on sterilized milk. Before these 
calves are allowed to associate with the healthy herd they are 
themselves inoculated with tuberculin, and, of course, if they 
show any reaction they are kept from the healthy herd, and 
either slaughtered or put with the reacting herd. 
8. After six months the animals in the healthy herd are in- 
oculated again, and any who now show a reaction are removed 
at once and put with the reacting herd. This process is re- 
peated every six months under proper supervision, and in all 
cases the reacting animals are separated from the healthy herd 
and put with the others. 
9. No animal that has once entered the reacting herd is 
ever put back among the herd of healthy animals, even though 
it may show evidence of having entirely recovered. 
As this process is continued year after year the animals 
in the reacting herd are gradually gotten rid of as they get old 
or as they are bought to slaughter ; the healthy herd is always 
increased by animals that are shown to be free from the disease, 
and thus the expectation has been that the healthy herd will 
gradually increase while the reacting herd decreases, until 
finally the disease will practically disappear. The only ex- 
pense to the farmer in all this would be that of building the par- 
tition in the barn and of seeing that the animals are kept iso- 
lated from each other. The State itself in these experiments 
undertakes the expense of furnishing the tuberculin and per- 
forming the inoculation. 
This, in general, has been the method adopted by Prof. 
Bang, and now in use under his inspection for several years. 
The results have been very favorable. The partition in the 
barn under Prof. Bang’s inspection is changed year after year 
Sim 5 
