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                  Hæmorrhagic Septicæmia.                          55

Subcutaneously.

Intravenously.

0.500 c.c.

1.0 c.c.

1.000 c.c.

2.5 c.c.

5.0 c.c.

7.5 c.c.

10.0 c.c.

12.5 c.c.

About 21 days after the last injection, the bulls were bled
2500 c. c. from the jugular vein. Twenty-four hours after
they were bled a second time, a similar quantity. A period
of over five months was necessary to prepare this serum.
Frequently deaths occurred after an injection of culture.
The sera preparing bulls appeared not to be immunised
against the disease. As has been observed in the preparation
of other anti-toxic sera, the repeated injections of the
toxic products established in certain animals a condition of
anaphylaxis.

Among one batch of serum preparing bulls five deaths
occurred.

Bull (1) died 2 days after the injection of 0.2 c.c. subcut.

„ (2) „

1 c.c.

„ (3) „

the first injection, subcut.

„ (4) „

0.5 c.c. subcut.

„ (5) „

0.05 c.c. „

                        Testing of Serum A.

In all the following tests 0.1 c.c. of a 48 hours broth
culture of Hæmorrhagic Septicæmia was used. Fresh
cultures from a rabbit or bull dead of the disease were, in
most instances, employed, and as controls two udlls were
inoculated with a similar amount of the virus alone.

                                  TEST I.

              Serum and Virus simultaneously.

The dose of serum and the virus were inoculated subcu-
taneously on either side.

Hill Bull.

Serum.

Virus.

Result.

c.c.

c.c.

1

1

0.1

Died 48 hours.

2

1

0.1

„ 36 „

3

20

0.1

„ after 3 days.

4

20

0.1

„ „ 50 hours.

5

20

0.1

„ „ 50 „

6

20

0.1

Lived, Temp. Reaction 39.2°C.

7

20

0.1

„ „ 39.0°C.

8

1

0.1

„ „ „ 39.0°C.

9

1

0.1

„ „ 30.0°C.

10

1

0.1

„ No reaction.

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