The Fargo forum and daily republican. [volume] (Fargo, N.D.) 1894-1957, 1913-10-09

cholera is the Introduction Of new
hogs into the herd. Such animals may
have ON from an infected district
or nave been exposed during transit
by means OF infected stock cars or
yards. For the same reason, stock
shows are liable to become means for
the spread of Infection.
Another factor to no small degree
responsible for the spread of disease
is found in the fact that on many
farms. hogs manifestly sick with the
disease n doomed to die are per-
mitted to linger about and to hide
themselves In various out Of the way
places. 1t Is reasonable to suppose
that this will soon, as it were saturate
a hog lot or pasture with disease and
the more infection or germs are thus
scattered about, the more danger it
will offer to the healthy hogs In q
certain district. II farmers could be
induced to kill this type Of animals
and to destroy the by i'm
mediate burning, they undoubtedly
would do a great deal toward limit
ing both the extent and the speed Of
the spread of the disease.
In the more specific means of pre-
serum must be given consideration.
Protective serum injected, into a sus-
cept1ble, healthy hog, that is not ex-
posed to infection, will protect the
animal for a period Of approximately
TOUR weeks. In hogs exposed to nat
ural infection during this period of
protection, the immunity will last con
slderably longer, from several months
TO a lifetime even. This same duration
or immunity may be secured by the
injection of a small quantity OF viru-
tent blood at the same time when the
serum is injected. This method. known
as the simultaneous method, can only
be relied upon when the serum 1sed
mas a very high degree of potency. At
the present time, however, we know OF
no available supply of serum of which
we are absolutely sur that 1t has this
uegree or potency and hence. for the
lime Delng, we do not recommend the
use OF the simultaneous method.
The above facts should be we'll pom
dered by those who intend to use ser
un1. Remembering that n0n-exposed
hogs injected with serum are immune
only Tor four weeks, 1t becomes clear
that they would have to be injected
again at the. end Of that period, If their
immunity against the disease is to be
continued. With the high cost and
scarcity Of serum, this would not b.,
profitable and hence, 1t is always bet
Ter 10 wait with the serum !only iniec-
uon, Until the disease ~actualIy occurs
IN the herd or until the exposure to
injection becomes Imminent or newt
able. Also in the case Of hogs about
READY FOR market or in that of ami
tnals to be exhibited at fairs would the
use OF serum-only be warranted.
In districts where cholera Ia NOT
prevalent, serum should not be used.
IN injected districts and ON farms in
danger of becoming the seat Of an out
break hog owners should attempt to
secure a supply. Keep the same in, the
zee box until its use becomes advis-
aDae' mis- would certainly be when
tne> nrst noga shows evidence, of the
olsease, and after that there. should
NOT De: p delay in the rttse of the
serum. When disease should NOT make
us appearance, there would be no SER
UNI wasted and some one else could
perhaps be benefited by its use.
o"lns &c. the great prevalence Of
hog cholera in the hog raising states
1t has become extremely dificult to Sc.
cure supplies of serum and orders for
serum are usually not filled for a con-
siderable time. BY placing advance
orders, the veterinary department of
the agricultural college Is endeavorinp
TO secure a supply Of serum. When
ever 1t a secure such. a supplv, the
serum will be furnished to those w
need OF 1t at the cost of purchase, that
is q cents per C. C. AS all serum Is
sent to us c. 0. d. and as only a small
fund Is available for this purpose. the
department. Is compelled to send out
those supplies on a c. o. d.. basis.
Owing to variations in potency. the
department does not assume RESPONSE
bility for the results of the serum sent,
1t merely handling the material al n
comes from the manufactures.
Whenever possible the infections of
serum should be entrusted to expert
enced yeterinarians and in making the
injections the following points are
worth remembering. Ms
Be scrupulously clean IN every de-
tail. Syringes should be either steril-
lied by boiling in a weak soda solution
or by rinsings with a hot per cenr-
carbolic acid solution. The skin 3at the
point Of incubation must be thorough
~ cleansed with a 2 per cent solution
OF lysol, creolin or similar @antiseptie.5
The inner side OF the thigh Ii the
best place-of infection. inserting the
injection needle deeply into the mus