Rock Island Argus. (Rock Island, Ill.) 1893-1920, 1915-11-15

Arrangements were accordingly
made by the Chicago company for a
lest under the supervision of the de-
partment Foriy-one thousand cubic
.centimeters Of the serum were
thoroughly mixed and rebottled. and
on June 30 samples were injected into
eight small hogs. Two check hogs
were also included in the test. Although
injections as large as 40 cubic cent?
meters We're used, it is certain that
none OF these hogs developed foot and
mouth disease. The test being thus
absolutely negative-ttat is to say no
indications Of the disease resulting
from 1.-THE company was informed
that it could ship out the serum to its
customers.
"On Aug S the inspector in charge
CT field inspection at Chicago tele-
pboned to Washington that case Of
foot and mouth disease had been dis
covered in a herd which had been in
oculated with this serum in Cook
county. Ill Pending investigation. all
shipments Of serum produced in Chi
cago were at once prohibited. AS a re
suit of the investigation It was found
that serum from the Chicago concern
had been used on II herds Of hogs,
eight OF which were in Illinois and
one each in Minnesota, Michigan and
Indiana Inspection showed that eight
OF these herds We're infected with foot
and mouth disease. although only a
very small percentage Of the hogs in
them manifested symptoms of the
disease. All the animals were. how
ever, slaughtered at once. The three
herds in which no disease was found
were also slaughtered without waiting
70 see whether they would subse-
Quently develop the disease or not
This measure was necessary on ac-
count of the risk that the disease might
be spread by the animals while in the
ineubative stage. As result Of the
precaution no further cases have been
/ reported from Michigan, Minnesota or
Indiana.
In addition TO these measures adopt
ed to control the spread of the disease,
samples Of the serum actually used
were procured from the owners of the
/ infected herds and also samples of the
remaining stock OF the Chicago con-
/ Germ. Pigs and calves, the animals
which are most susceptible to foot and
mouth disease. were inoculated with
these samples The results were again
negative and after two series of tests
had been made, the United States pub
lie health service was asked to conduct
q third series. This also was negative.
Up to this time, therefore. four SER
les of tests had been made in which a
total Of 81 animals had been used. None
OF these % animals developed foot and
mouth disease and the NEGOTIATIONS at
/ forded no evidence that the serum was
/ III any way contaminated Each subse-
quent series apparently only confirm
ed the original test made before the
serum was permitted to be placed upon
/ the market. The fact remained, how
ever. that herds treated commercially
with the serum had developed foot and
mouth disease. 4 fifth test, therefore.
was made and ten days after inocula-
ton, the ed animal which had been
used IN the tests, calf which had re-
ceiTea 30 cubic centimeters. developed
Characteristic LESSONS The diagnosis
OF foot and mouth disease was subse-
quently confirmed BIZ the incubation of
ether animals with material from the
infected calf.
This is regarded as proof that the
suspected serum actually was infected.
/ Why the standard tests used on 81 ami
nlals failed to reveal this fact ia a