Enclosures.
Honourable Colonial Secretary.
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PE 7 MAY 00
381
1.
It is impossible to define the exact perio
of immunization. Probably about twelve months, possibly
much longer. It depends entirely upon the nature of the
inoculation, and the constitution of the animal operated
upon.
2.85.
Three methods of inoculation for rinder-
pest have been tried with success in South Africa.
A.
Bile inoculation, which will give a long
immunity but in this case it is first necessary to obtain
the bile from an animal which was died of the disease.
B.
A method by which animals are rendered
immune by inoculating them simultaneously with serum and
virulent blood, but in this case it is difficult to deter-
mine the exact quantities of blood and serum which it is
necessary to inject to bring about the desired effect.
C.
The serum method alone, which has shown
good results. This is more of a preventive measure, and
does not cause the animal to become sick as a result of
the operation.
Hence