Bull. 56, Hygienic Laboratory. 
i 
19. AN EXCEPTIONALLY DANGEROUS TUBERCULOUS COW. 
At the time her picture was taken she was daily expelling a large number of tubercle bacilli per rectum with her feces. 
Her general condition is good and she shows no symptoms of tuberculosis. Without the tuberculin test she would 
not have been known to be tuberculous and without other tests her uncommonly dangerous character would not 
