38 Twenty-seventh Annual Report of the F
DEPARTMENT OF ANIMAL HUSBANDRY , .
usiziw cmrts. sump AND swimzi
BY E. S. Goon. I
The work of this Department during the year 1914 was
carried out along live different lines, namely: (1) A contin-
uation of investigations pertaining to the discovery of a
prevention or cure for infectious abortion in cows. (2) A
continuation of investigations pertaining to the discovery of `
a prevention or cure for infectious abortion in mares and
jennets. (3) Investigations relative to the etiology of
infectious arthritis of colts. (4) A continuation of investiga- _
tions relative to the economy of pork production in the dry
lot and on forage crops. (5) Steer feeding experiments.
Our work in protecting cows from abortion in a large
herd, where the disease existed to a considerable extent the
previous year, has been very satisfactory. It is too early
yet, however, to give a complete report of this work.
Chemical and biological products were used in this experi-
ment. The work of diagnosing the disease in herds and of
advising as to procedure in infected herds has been continued
during the year.
We have arrived at no conclusive results relative to .
immunizing mares against infectious abortion. In our
investigations relative to infectious arthritis (rheumatism)
in colts, we were able to isolate the same germ that causes
infectious abortion in mares, showing that this organism is
capable of producing the disease. as are other germs which
have been noted by other investigators. Infectious arthritis
is usually found associated with colts that come alive in a
stud affected with infectious abortion.
One series of experiments with swine was to determine
the value of distillers dried grains as a feed, alone and in