508 



IOWA DEPARTMENT OF AGRICULTURE 



from the importation of cattle without proper safeguards. The 

 four reactors were kept in quarantine for four months and then 

 retested, all of them again showing a reaction, and in October, 1909, 

 they were slaughtered at the Brittan & Company Packing plant 

 at Marshalltown, showing marked lesions, two of them being con- 

 demned for offal. 



The accompanying cuts show these animals to be in apparently 

 good condition, which fact tends to support the theory that it is 

 impossible to positively diagnose tuberculosis without the aid of 

 tuberculin. 



FINAL POST-MORTEM EXAMINATIONS. 

 INDUSTRIAL SCHOOL, ELDORA, IOWA, OCTOBER 13, 1909. 



*Prescapular. 



It is discouraging to endeavor to keep a clean herd when infec- 

 tion can be introduced without restraint by the importation of 

 animals from other states. In this instance it was supposed that 

 due care had been exercised to secure heathly cattle. Nevertheless it 

 was found that the very cattle which were intended to build up 

 the herd proved to be the means of infecting it. 



An examination of the herd in May, 1910, when it numbered 

 seventy-two head showed no infection. It is gratifying to know 

 by the results of the test of May, 1910, that the herd had again 

 gained the same standard of perfection it had claimed prior to the 

 importation of the diseased cattle. 



The herd at tbe Soldiers' Orphans' Home at Davenport has 

 developed serious infection during the past year. The herd was 

 tested in 1908 and found to be free from tuberculosis and when 

 tested in June, 1909, the examination disclosed six reactors and six 

 suspects out of the herd of fifty head. This infection was accounted 

 for by the fact that subsequent to the test of 1908, other cattle had 

 been purchased and brought into the herd from other states. These 



