504 



IOWA DEPARTMENT OF AGRICULTURE 



twenty-nine reacted. The eradication of the disease has been ac- 

 complished by relying upon the tuberculin test, and basing our 

 action wholly upon its results. The one hundred and twenty-nine 

 reacting in the test just referred to, all showed pronounced lesions 

 at the post mortem examination. Of the fifty-one reacting in May, 

 1909, fifty were slaughtered at the T. M. Sinclair packing plant in 

 Cedar Rapids on June 9th. Four of these were found to be so badly 

 infected that they were consigned to. the fertilizing tank. Two of 

 them, specimens from which are shown in accompanying illustra- 

 tions, were extreme cases. The remaining forty-six were used 

 for beef, seven of them showing no visible lesions, undoubtedly due 

 to recent infection ; this number including some suspicious animals. 

 The four consigned to the tank were all of the herd purchased in 

 New York. It is evident that the disease was brought in by this 

 New York shipment. It is believed that animals from this same 

 shipment were sent to the state institutions at Mount Pleasant, 

 Glenwood, Clarinda and Eldora. Prior to the receipt at the in- 

 stitutions named, of the animals referred to, tests of the state herds 

 disclosed the presence of no tuberculous animals. Subsequent tests 

 after the arrival of the New York cattle showed marked infection. 

 Furthermore, the animals slaughtered from the Independence herd, 

 out of the New York shipment, showed such advanced stages of 

 the disease that they must have been infected prior to their ar- 

 rival at Independence. Those of the condemned animals showing 

 the most advanced lesions were from the New York shipment. These 

 considerations overrule the suggestion that the imported animals 

 might have become infected after reaching Independence. 



FINAL POST-MORTEM EXAMINATIONS. 

 INDEPENDENCE HERD, DECEMBER 10. 1909. 



* Susp. 



+ Normal. 



{ Generalized. 



