NINTH ANNUAL YEAR BOOK— PART IX 371 
In order to show the percentage of different herds affected, the follow- 
ing is a partial summary of tests made by a number of the assistants: 
Thirty-seven herds tested, consisting of 305 head, forty-one reacted, about 
14 per cent; nine herds, consisting of 215 head, fifty-seven reacted, about 
26 per cent; eight herds, consisting of 280 head, fifty-four reacted, making 
about 26 per cent; nine herds, 176 tested, twelve reacted and eight sus- 
picious, making a percentage of about 7 per cent diseased; four tests, 
consisting of sixty-three head, fifteen reacted and five were suspicious, or 
about 24 per cent being diseased; twenty tests, consisting of 272 head, 
forty-five reacted, or about 16 per cent; seven herds, eighty-one tested, 
thirty-eight reacted, or about 47 per cent; another test, consisting of 
eight herds, 148 head of cattle, of which seven reacted, making about 5 
per cent. The last test, however, consisted mostly of cattle intended for 
export. 
Another interesting test was reported to our department by a packing 
house in Pittsburg, Pa., stating that out of a shipment of eleven head, 
five were found to be diseased with tuberculosis. The shipment was 
traced to Halligan & Son, Moorland, Iowa. An investigation was made 
by our department and the dairy herd tested, consisting of fifty-eight 
head, out of which thirty reacted to the test, nearly 52 per cent. Nine- 
teen of this number were immediately slaughtered at the Agar Packing 
Co., Des Moines, all showing tubercular lesions, six being found diseased 
in a generalized condition. The post mortem was conducted by the chief 
in charge, and witnessed by the owner, members of the board of health, 
the State Veterinarian and three assistants. The owner expressed him- 
self as well pleased and thoroughly satisfied, and that the tuberculin test 
was absolutely reliable. He further stated that he would not have known 
of the existence of disease among his cattle if his attention had not been 
<!alled to it by our department, inasmuch as his herd appeared to be per- 
fectly healthy. 
A similar test was conducted on the farm of Hon, C. W, Stewart, of 
Clive, Iowa. During the early part of last spring we received notice 
from the bureau stating that out of a shipment of nineteen head slaugh- 
tered at a packing house six were found diseased with tuberculosis. The 
bureau also notified Mr. Stewart, and he at once called upon us and ex- 
pressed a desire to have his entire herd tested. Being very desirous of 
eradicating the disease from his premises, and as soon as convenient the 
herd was tested, consisting of thirty head, ten of this number reacted to 
the test and all w^ere immediately slaughtered, all being found diseased, 
three in a generalized condition, Mr. Stewart has taken a very active 
interest in this work, and has written a very exhaustive report of the 
test, which was copied in some of the leading papers. He expressed him- 
self as thoroughly convinced of the reliability of the test, and the need 
of legislation that would aid our department in carrying on this work, 
and, as a further safeguard to prevent a recurrence of the disease on his 
premises, he has decided to use the immunizing agent known as Von 
Behring's Bovo-vaccine, 
