NINTH ANNUAL YEAR BOOK— PART IX 379 
About sixty days later (July 1st) they were tested for the third time, 
at that time all having reacted, when four of the seven failed to react. 
Some time later they were tested for the fourth time, five reacting, but 
during these four tests there were two which failed to react after the 
first test. 
Still later the seven cows were slaughtered at the Agar Packing Co. 
plant in Des Moines, Iowa, and all showed advanced tuberculosis, two of 
the seven being consigned to the tank. 
However, we do believe repeated tests to be of vital importance to the 
non-reacting animals at any time from six to twelve months, as tuberculin 
will not always give a reaction during the period of incubation or where 
the disease has been arrested. The same is also true of advanced stages 
of the disease, so that the records of tested herds do not always point out 
all of the infected ones, as the ones recently infected, or those in the 
advanced stages, may not react until the disease becomes active. In 
order to eliminate the disease entirely from a herd repeated tests are 
necessary. 
Where tuberculosis has been known to reappear in a herd, after the 
reactors have been slaughtered, both the owner and the public are prone 
to place the blame upon the veterinarian or to question the reliability of 
the test, when in fact the owner himself is to blame for this failure to have 
them retested. It is therefore quite important that the owner be advised 
by his veterinarian as to the necessity of subsequent testing, thereby re- 
lieving himself of the responsibility should the disease recur. 
Cattle reacting to the tuberculin test should be disposed of in the fol- 
lowing manners: (1) Total destruction; (2) slaughtered at abattoirs 
under proper inspection; (3) isolated for breeding purposes according 
to the Bang method. 
The veterinarian must in all cases keep a record of animals tested, 
date of testing, owTier's name, number reacting, and the disposition of 
all reactors, if possible. 
Among the several thousand animals which have been tested during 
the past season there was no herd in which so great an amount of interest 
was taken as that of a state herd at Glenwood, and there were several 
reasons for this unusual interest, the first and greatest being that it was 
the most beautiful, typical dairy herd of Holsteins that it has ever been 
our pleasure to test. There were 106, practically all Holsteins, and of all 
ages, and were tested April 21 and 22, 1908. Of this number there were 
fifty-seven reactors, almost 54 per cent, and this was not considered a 
suspected herd. 
Elsewhere in this report is given a brief summary of a proposed ordi- 
nance which should be adopted by every city and town in Iowa. This 
ordinance provides for the testing of all dairy cattle, and especially the 
cows from which the city milk supply is taken. Many Iowa cities and 
towns have adopted the suggestion and the results have been most grati- 
fying. As an example we have a report from a town in northern Iowa, 
where inspection is in force. The local veterinarian while inspecting 
some cattle which had been slaughtered for beef purposes found tubercular 
lesions very pronounced. Other parties who refused to comply with the 
ordinance were prosecuted. At the preliminary trial, a fine of $25 was 
