The Kevin review. [volume] (Kevin, Mont.) 1922-1929, 1923-02-01
TO CHECK BLACKLEC

For the prevention of disease Their
is no biological product used as ex
tensive or which has become SO wei
established, as blackleg vaccine. TIL,
good results which followed its in
PRODUCTION have been recognized
throughout the United States and i
may be safely stated that in black
leg districts a considerable proper
ton of animals have been annual,
vaccinated with this product. The
available statistical data prove tht
remarkable reduction of losses from
this disease, as a result of systematic
vaccination.
1t must be accepted, however, thai
blackleg vaccine prepared in the
usual pellet or powder form from
attenuated blackleg meat is a com
paratively crude product. Further
more, the results obtained from this
sort of vaccination were not uniform
and at times losses among the vaccin-
ated animals from blackleg and also
the vaccination itself was frequently
responsible for deaths among ami
mails.
Realizing the shortcomings OF
such vaccine, investigators have been
at work to develop a more uniform
product which would avoid losses
from vaccination and at the same
time confer to the animals an effect
i've protection against blackleg.
In Blackleg Aggressin (Lederle) a
product has been developed which
has overcome all the shortcomings
and which proved not only on expert
mental work but also on actual ap-
plications of this product in the field
to effectively protect all vaccinated
animals against natural exposures.
Blackleg Aggressin was developed in
1916. 1t is produced from animals
artificially infected with Dlackleg and
utilizing the exudate and extracting
the juices from the affected muscles.
The product thus obtained is clari-
fled and refined. Blackleg Aggressin
ever since it's introduction has been
used in continuously increasing
quantities; so much SO that it is a
fair estimate that at the present time
several millions of animals are being
annually vaccinated with this prod
uct. The splendid results obtained
from Blackleg Aggressin are without
a doubt due to the superiority of this
product owe all others which have
been used heretofore in the vaccina-
ton against blackleg.
This fact has been substantiated
from the official tests made with the
Aggressin not only by many of the
state laboratories but also by the
bureau of animal industry at Wash
ington, D. c., likewise by the govern
ment laboratories at Rhodesia, South
Africa, and the many field tests which
we have undertaken with the Ag-l
gressin.
The Leder1e Antitoxin Laboratories
logical products used in the proven
ton of disease of animals have COL
lected extensive statistical data on
the results from their Blackleg Ag-
gressin and not only from the United
States but also from many of the
foreign countries and as a result of
this data it may be said that black
leg in cattle can be effectively con-
trolled by the use of Blackleg Ag-
gressin. The advantages of Blackleg
Aggressin (Lederle) may be sum-
married. as follows:
1t is an effective immunizing agent
against %hlackleg.
1t confers a lasting immunity
which protects the cattle against the
disease during their entire life.
Since it does not contain the black
leg germ in any form 1t cannot pro-
duce the disease. Therefore, losses
incidental to vaccination with the pei
let or powder form are entirely avoid
ed.
DR.. M. E. Knowles, state distribu-
tor for Lederle Aggressin, Helena, or
any graduate veterinary surgeon in
Montana can supply your wants.