NINTH ANNUAL YEAR BOOK— PART VIII 361 
invaluable aid in checking sudden outbreaks, such as occur within 
their jurisdiction. 
Because Iowa has inadequate laws governing the shipment of 
disease-infected stock to points within our borders, there have been 
some serious lossess sustained by stock raisers. Registered and 
unregistered animals bought in other states and shipped to Iowa 
have developed such extensive cases of tuberculosis that thousands 
of dollars worth of stock have been lost, to the end that public 
safety and protection of other stock might be conserved. 
By far the most important work of the department has centered 
about the location and eradication of tuberculosis among cattle. 
The life of the Iowa hog is so short that there are rare cases where 
infection has extended to the human family from this source, so 
that all efforts to eradicate the disease have been directed toward 
the cattle industry. Of the subject, tuberculosis, too much cannot 
be written, and it has been proven that, so far, educational meas- 
ures as applied to published articles on tuberculosis, have stirred 
the people of our state to action, and more especially to sensible 
efforts towards destroying all possible avenues from whence this 
disease enters the human family. And it rests with this department 
to carry out a work which is the foundation of all subsequent ef- 
forts, namely, the destruction of tuberculous stock from whence the 
disease originates and is spread. It is not within our province to 
report full and comprehensively all work along this line as so far 
accomplished, but suffice to say that thousands of cattle found to be 
afflicted with tuberculosis have been either destroj^ed or placed in 
safe quarantine, and the spread, at least from these animals, 
checked, thus saving the state and stock raisers thousands of dol- 
lars. Tersely told, the intrinsic value of tuberculin tests made of 
Iowa cattle cannot be reckoned in facts and figures, for the reason 
that the ultimate end of infection is beyond human knowledge. 
Elsewhere in this report is found a comprehensive article upon the 
subject, including an exhaustive outline of its cause and effects. 
This department has been obliged to respond to a large number 
of calls where infection from glanders and kindred diseases have 
started. As shown by articles upon this subject, much has been 
accomplished to, in a systematic way, prevent spread and subse- 
quent losses through serious outbreaks. Another feature which 
developed new tendencies during this period is that of supplying 
stock shippers with certificates of health for stock consigned outside 
of the state. It is a fact that other states have rigid rules govern- 
