TUBERCULOSIS 



271 



shown in the following figures, which indicate the percent- 

 age of animals found to be tubercular on slaughter. 



The only figures available as to the spread of the disease 

 in this country are those collected by the Bureau of Animal 

 Industry in the meat inspection service which is maintained 

 in all the larger packing-houses of the country. The fol- 

 lowing table presents the data with reference to the per- 

 centage of animals found tubercular on post-mortem ex- 

 amination. 



Cattle Swine 



1907 

 1908 



1 !>()'. 

 1910 



]!>! 1 



1913 



1914 

 1915 

 1916 

 1917 

 1918 



0.4 

 0.9 

 1.3 

 1.5 

 1.7 

 2.1 

 2.1 

 2.1 

 2.3 

 2.6 

 2.3 

 2.0 



1.5 

 2.0 

 2.4 

 2.7 

 3.7 

 4.6 

 5.6 

 6.6 

 7.6 

 7.2 

 9.8 

 7.0 



These figures show that tuberculosis has increased in 

 this country rapidly in recent years. 



The disease is most common in the pure bred herds not 



