PART II.

         IMMUNISATION AGAINST CHARBON
               SYMPTOMATIQUE BY MEANS
                     OF A SINGLE VACCINE.

The well-known system of vaccination against Charbon
Symptomatique discovered by Arloing and Cornevin, has for
many years been practised with so much success that any fur-
ther attempts to improve on this method may appear from a
practical point of view unnecessary. The immunity established
by these vaccines is undoubtedly of a solid and durable nature.

Statistics go to prove that in Black Quarter districts the
mortality which ranged from 2 to 25% has by means of this
vaccination been reduced to 1%. It is also recorded that vac-
cinated animals were found to be protected the year following
that in which they were treated.

However, during recent years, this system of vaccination
has not met with the same approval as it at first received. The
main reason for this is that frequent accidents have occurred
after the use of the vaccines. The average mortality after vac-
cination is extremely small, being less than 1%, but this mor-
tality is not evenly distributed. For some unexplained reasons
a large number of deaths at times occur after the use of either
the first or the second vaccine.

In one instance, recorded in England, fifteen cattle were
inoculated with quarter evil vaccine and within the next three
days five of them died from inoculation quarter evil.

The same vaccine was used in forty-eight other cattle in
different herds without any accidents. In another case eight
animals were inoculated. On the third day after the use of
the second vaccine, two out of the eight, died with lesions at
the point of inoculation.

In Switzerland, in 1895, a mortality of 7.8 per 1,000 was ex-
perienced. The same vaccine used in France and Holland
gave a result of 0.72 per 1,000.