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23. Robert Koch postulated that (1) anthrax bacteria always are present in the blood of animals sick with the disease but not in healthy animals, (2) inoculation of blood from an animal with anthrax into another animal also causes anthrax, (3) inoculation of anthrax bacteria isolated from the blood of a sick animal and grown in culture will transmit anthrax to the new animal, and (4) anthrax bacteria can be isolated from the new animal. “These conclusions are so certain, that no one will dispute them, and the anthrax bacillus will be looked upon by the scientific world as the causal agent of ordinary, typical anthrax infection in both our domestic animals and in man himself.” See: Koch R. The etiology of tuberculosis (Koch’s postulates), 1884. In: Brock TD. Milestones in Microbiology: 1556 to 1940. Washington, DC: American Society of Microbiology, 1998:116–118.
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26. CDC. Human anthrax associated