TUBERCULOSIS 



281 



used for a long enough period to give indications as to its 

 final success. In many sections of the United States it 

 would not place an impossible burden on the dairy industry 

 if all tubercular animals were removed from the herds. In 

 order to detect the disease in the herd, and to determine 



48. A Tubercular Animal 

 An advanced case of tuberculosis. Such an animal is termed 



piner " or a 



the real condition of animals to be introduced into the herd, 

 a more effective method of detecting the disease than physi- 

 cal diagnosis must be employed. 



The diagnosis of the disease can be made with the greatest 

 certainty by applying what is known as the tuberculin test. 

 Tuberculin was originally devised by Robert Koch as a cure 

 for tuberculosis. Its use in the case of cattle is of much 

 value in indicating whether they are affected in any degree 

 with the tubercle bacillus. If any tubercular tissue exists, 

 the introduction of tuberculin causes a rise of temperature 



