Control of Bovine Tuberculosis. 



tal in Edinburgh, in which the disease was due to the bovine bacil- 

 lus in 65 cases, while in only 7 patients was the disease caused by 

 the human bacillus. Trans.] 



Conclusions. 



If we compile the results of this chapter the following conclu- 

 sions may be established: 



Although tuberculosis of cattle is less dangerous for man than 

 tuberculosis of man, the danger from the enormous spread of the 

 disease in our herds, and especially among the dairy cows, should 

 in no way be under-estimated. Theoretically the possibility of 

 infection is afforded in all cases in which the ingestion of living 

 tubercle bacilli with the milk takes place ; from a practical stand- 

 point however this possibility of infection comes into consideration 

 only when the bacilli enter the individual in great quantities, and 

 the resistance (of a local or general nature) of the body is not 

 equal to this quantitative attack. This disposition, or these rela- 

 tive conditions between the injurious agents and resistance, appear 

 to be especially unfavorable in children ; therefore the requirement 

 of the elimination from dairy herds of all tuberculous animals 

 which pass tubercle bacilli w r ith their milk, appears to follow as a 

 matter of course. According to the experience at the tuberculosis 

 eradication stations only those animals must be considered as 

 eliminators of tubercle bacilli w r hich are affected with open tuber- 

 culosis, and expel the tubercle bacilli with their secretions and 

 excretions, especially animals affected with tuberculosis of the 

 udder, open pulmonary tuberculosis, tuberculosis of the uterus, 

 intestinal tuberculosis, and furthermore animals with tuberculosis 

 of the liver, kidneys, skin, eyes, and larynx. 



Measures Against the Danger. 



The elimination of animals passing tubercle bacilli should 

 also be energetically encouraged on general economic grounds. 

 For this work three methods may be followed : 



1. Treatment of the disease and curative attempts. 



2. The immunization of healthy herds. 



3. Energetic sanitary police eradication measures, reduction 

 of the possibilities of infection, and protection of young animals 

 from infection, together with favorable conditions for bringing 

 up young stock as a preventive measure against their accidental 

 infection, toward which we are powerless. 



The curative measures in affected animals may be left out of 

 consideration as measures of control, since excepting the uni- 

 formly bad or only slightly favorable results the methods of 

 treatment for veterinary practice are too complicated, and are 

 not practicable in consideration of the value of the animal. For 

 the sake of completeness the experiments with iodipin should be 

 mentioned here (Hauptmann). Creosote has also been employed. 



