The Jennings daily record., 1902-09-10
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AL 1u&1lSA COh hIulLlCc HAS IOCCASAy
reported some valuable observations
on tuberculln and tuberculosis. Elk
periments were made for the purpose
of determining the effect of repeated
doses Of tuberculin and the length OF
time after infection before reaction
to tuberculin takes place. For this
purpose apparently healthy animals
were selected and tested with tuber-
culin. If they failed to react they
were inoculated with the tubercle
bacillus and tested at intervals after
ward, in order to determine how soon
they would react to tuberculin. One
animal that gave a decided reaction
when tested on October 9 subsequent
ly failed to react, or reacted alter
nately. For two months it received
large quantities of tuberculin and en-
tirely ceased to react. The animal
was inoculated with tubercle bacllli
on February and reacted. to tuber-
culin eight days after incubation.
The animal was then treated to large
doses OF tuberculin without reaction.
When killed on May % no trace OF
tuberculous lesion was found except
casefied and inert tubercle In
meSenteric gland. In other expert
ments it was found that in many
cases reaction to tuberculin did not
occur until from 40 to so days after
the animals were inoculated with tu-
berculOSiS. In several cases Whlcn
reacted decidedly on the first test,
complete failure to react was noted
if the test was repeated within short
time. The experimenters expressed
their belief that repeated injections OF
tuberculin may have some curative
effect, or may retard the progress OF
the disease to some extent, and that
the matter is largely Influenced by the
individuality of each animal. A few
animals could not be inoculated with
virulent tubercle bacilli, although
they had not been previously treated
with tuberculin and appeared to be
entirely resistant to tuberculosis.
One Way of Spreading charbon.
If all danger ended with the ex-
piring breath of charbonous animals,
all would be we'll, as is perhaps often
thought to be the case by many
stock owners; unfortunately this is
not SO, but on the other hand, the
dead animal is, through its infected
blood and tissues, the most danger
Gus source, of future infection. An
outbreak generally starts with one
dead animal that has caught the in
fection from grazing over pasture that
has been previously contaminated by
the discharges from a charbonous
carcass. With the myriads of blood
sucking flies surcharged with the
germ-infected blood of this first vic
tim, they are now prepared to start
the deadly work of inoculating healthy
but susceptible animals. There are
many other agencies that are capable
of transmitting the virus, in fact any
thing that can carry charbonous blood
can do it, but we believe that the
horseflies, and perhaps other blood
sucking insects, are more responsible
for the extensive spread of this dis
ease in our state than all other
agencies combined, which opinion
will, we think, be borne out by any
careful observer familiar with this
plague. But, provided there were no
charbonous carcasses left exposed,
then the chief source from which the
various transmitting agencies pro-
cure their deadly freight would not
exist, and necessarily it could not be
inon as to the most important factors
in producing our periodic outbreaks
or epizootics of Charlton in Louis
lana, we would say, unhesitatingly,
first, original victims that have been
carelessly hauled out and left ex-
posed. Second, horse-fiies to convey
the charbonous blood from the re-
Gently dead animal to healthy stock.
Mango of the Horse.
The horse may be infected with any
of the three groups of mango para
sites. With the exception of the sym
biotic mango, which is usually To-
Gated about the pastern joints, the
disease is most commonly seen on
the sides of the neck, base of the tail
or on the inner sides of the limbs.
The mite is so small as to be easily
overlooked in making an examination.
If the mites are present they may be
seen by placing pieces of crusts and
scabs on dark paper when the small
lighter-colored mites may be seen.
With the exception of mango of the
pastern joint the disease is very diff
cult to cure in the horse unless it is
stopped in the early stages. Sulphur
ointment and washes with tobacco in
fusions are effective remedies, but
usually several applications are neces-
sary. Carbolated glycerin or vase
line containing ten per cent of car
bolic acid are good remedies as they
soften the skin and at the same time
kill the mites. AS a precaution
against spreading the disease to
healthy stock harness, saddles, blan-
kets, etc, that have been used on the
diseased animal should not be allowed
to come in contact with other stock
Bulletin So, Oklahoma Station.