introduced into the herd through the purchase of one or more breeding
animals. Because of the prevalence of infectious abortion among cows, it is
advisable to subject newly purchased breeding animals, or a cow that has
been bred outside of the herd, to a short quarantine period before allowing
them to mix with the herd. The breeding of cows from neighboring herds to
the herd bull is not a safe practice. In communities where there are
outbreaks of this disease, animals that abort, or show indications of
aborting, should be quarantined for a period of from two to three months.
The separation from the herd should be so complete as to eliminate any
danger of carrying the disease to the healthy animals on the clothing and
farm tools. If this method of control were practised at the very beginning
of the outbreaks, the disease could be checked in the large majority of
herds.

The foetus and membranes should be destroyed by burning. In case the animal
does not pass the fetal membranes, they should be completely removed. In
the cow, it is advisable to wait twenty-four hours before doing this. The
animal's stall should be thoroughly cleaned and disinfected. It is very
advisable to give the entire stable a thorough disinfecting. For this
purpose a three or four per cent water solution of liquor cresolis compound
may be used. It is advisable to apply it with a spray pump. The floor and
feed troughs should be sprinkled daily with the disinfectant. All manure
should be removed to a place where the animals can not come in contact with
it. It is not advisable to confine the cows to a small yard. The more range
they have the easier it is to control the disease.

_Individual treatment_ is very necessary. In infectious abortion the mucous
lining of the womb and the passages leading to it become inflamed. This
should be treated by irrigating the parts with a warm water solution of a
disinfectant that is non-irritating. This treatment should be repeated