The Idaho Republican. [volume] (Blackfoot, Idaho) 1904-1932, 1907-12-27

| had II, so II seems that the disease
is not likely to spread beyond the
limits of the pen in which the infected
animals are kept. The pigs of lot one
were separated by lane a rod wide
from the pigs of lot two, so 1t does
not seem probable that they received
their infection from lot two It is
possible that the pastures on which
the pigs "f lots one and two were kept
had bee "~eviously infected with the
tub % t~"illus from pasturing other
STOCK so affected, and that the two in
fected pigs of lot one contracted the
die Sc in hat way. Or 1t is possible
thai thy may have obtained 1t
through the pasteurized milk, al
though If they did it is strange the in
fe. ION was not more general, as every
lot of milk was equally divided among
the four lots of pigs. Frequent tests
OF the milk showed that the pasteuri-
eaton had been thoroughly done, so
that this source of infection is not at
all probable. Of course, it should be
borne in mind that although the pigs
were prob IDLY free from tuberculosis
at the be: inning of the experiment. 1t
Is not absolutely certain that none
wee affected. &c. while the exact
SOL e of injection of the two pigs of
lot one cannot be determined, it seems
most probable that, since none of the
pigs similarly fed in dry lot were in.
fected, the blame should be attached
to other stock that may previously
have frequented the pasture of lot one.
The results indicate. however, very
clearly that pigs in a dry lot are no
more likely to contract bovine tubercu-
losis than are pigs in pasture, either
from yards in which cattle have pre-
viously been kept or from infected
pigs occupying adjoining quarters.
There was, in a general way, about
the same degree of infection among
the pigs of lot two on pasture and lot
four on dry lot, so that the more ia
vorable conditions for general thrift |
and growth of the pigs on pasture ap- |
parently had no influence with the dis |
ease. Noting the infection of the in.
dividual pigs, 1t is seen that every pig |
infected at all at time of slaughter |
was affected in the glands of the cervi.
cal region; all but one were affected |
in the bronchial region; about 80 per
cent. We're affected in the portal and
mesen'(~'c glands; one-half had af.
fected livers, while only 20 to 30 per
cent had affected spleens; 20 per cent
had tuberculous areas on the insides
of the rits and other parts of the
body, and ouly 20 per cent. had af.
fected lungs. 1t is, indeed, character.
istic of the disease in hogs that it is
present in the cervical glands If it is
present at all, and 1t is not at all Ger.
tain to be found in the lungs.
AS has previously been noted, the
records of u e weights, feeds and gains
Of the pigs in the several lots Indicate
that, while pigs affected with bovine
may show by their out
ward appe' "ance no perceptible DIFF
ference from healthy pigs, their feed
Ing qualities are nevertheless to some
extent injured, so that they make
smaller gains and are likely to require
more feed for 100 pounds gain than
healthy pigs. The gains made by tho
Infected pigs enforce the same thought
The results of this experiment in
licate:
1. That pigs fed milk containing vir.
llent bacilli Of bovine tuberculosis are
'ery likely to become quickly and Sc
'iously infected with the disease.
2. That properly pasteurized cream
ry skim milk is safe feed for pigs.
3. That pigs confined in small dry
ards are no more susceptible to tuber-
lie bacilli taken in the food than are
igs on pasture, while at the same
ime they are fully as resistant as are ,
asture-fed pigs to tubercle bacilli
rom other/sources.