No. 7. DEPARTMENT OF AGRICULTURE. l«3y 



were not kept for any length of time separate from the main herd 

 after their arrival at the farm. 



I believe it is of value in the elimination of tubercmlosis from a herd 

 for each animal to have a certain stanchion or si all in which it re- 

 mains during its time of service in the herd. 



*& 



Results of Tuherculin Tests, 1907. 



Date of test, April. 



Number of animals tested, 201 



Number of animals reacted 



Percentage of reacting animals, 



Date of test, October. 



Number of animals tested, 131 



Number of animals reacted, 



Percentage of reacting animals, 



At the time of the October test there was one cow exhibited a rise 

 of temperature to 104° F. at the sixteenth hour following injection, 

 though all the temperature measurements prior to the sixteenth hour, 

 as well as those following the sixteenth hour were below 102.5° F. 

 Therefore she was not considered a positive reactor, though she was 

 removed and isolated from the herd for six months when she was 

 again tuberculin tested and gave a perfectly clean test and has con- 

 tinued to do so up to the present time. 



Results of Tuherculin Tests, 1008. 



Date of test, April. 



Number of animals tested, 145 



Number of animals reacted, 2 



Percentage of reacting animals, 1.4 



Date of test, November. 



Number of animals tested, 1(39 



Number of animals reacted, 3 



Percentage of reacting animals, 1.8 



The only explanation that I can offer for the reinfection of the 

 herd is, that during this year the attendant of the tuberculous ani- 

 mals upon the Bang system, severed his connections with the farm 

 and another man was obtained to do his work who was not as care- 

 ful in seeing that there was no interchange of utensils used in the 

 barn containing the tuberculous cows and the stables of the main 

 milking herd. In investigating the matter I also was informed that 

 he would constantly associate with the employees in charge of the 

 milking herd. 



Results of TudercuUn Test, 1909. 



Date of test, April. 



Number of animals tested, 151 



Number of animals reacted, 



Percentage of reacting animals, 



