CONTAGIOUS BOVINE ABORTION                            275

these individuals become again capable of resuming their former vocations. But it
is very doubtful whether this clinical cure connotes also a bacteriological cure, for
relapses sometimes occur and it would therefore appear that what has occurred is
merely a clinical cure, such individuals remaining carriers of the germs which again
become active when a suitable opportunity offers. Since cattle and, for the matter
of that, goats and sheep affected with contagious abortion show no clinical symp-
toms of the disease at all, the apparent discrepant results in the two cases are in
reality not discrepant at all.

                                                    REFERENCES.

Bryan (1929). Vet. Med. 25, 511—512.
Edwards and Coffman. (1926). "A promising chemotherapy for infections aportion of cattle."
No. Ameri. Vet. 7, 31—32.
Graham and Thorp (1930). Cornell. Vet. 20, 4.
Gwatkin (1930). J. A. M. A. 77, 743-745.
Huddleson (1927). J. A. V. M. A. 71, 231-234.
Larrieu(1932). Perva Veterinaire. 84, 142—143.
Power (1926). No. Ameri. Vet. 7, 32.
Schubert (1929). Wiezer Tierarzal Monatsschr. 16, 23, 913—931.
Ziemann (1921). Duet. Med. Wacheuschr. 47, 180, 506.

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