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Robert Koch
Robert Koch
The Anthrax Disease Cycle. Anthrax particles live in a vegetative state until exposed to oxygen, where they form many infectious spores. They can live
The Anthrax Disease Cycle. Anthrax particles live in a vegetative state until exposed to oxygen, where they form many infectious spores. They can live in the soil and be consumed by herbivores. Large herbivores, like cows, are most susceptible to anthrax disease, and humans are affected by animal waste, fecal or corpses, by these herbivores. Anthrax infection is spread to humans when spores gain entry into the body, whether that is from inhalation, open wounds, or another method of entrance. Once inside, the spores are activated, allowing the bacteria to multiply and spread their toxins. Another spread of infection is through biting flies, like mosquitoes, that come in contact with the blood and feces of herbivores, preceded by contact with human flesh (information from Bergman
Koch's drawing of tuberculosis bacilli in 1882 (from Die Ätiologie der Tuberkulose)
Koch's drawing of tuberculosis bacilli in 1882 (from Die Ätiologie der Tuberkulose)
Photograph of Koch (third from the right) and other members of the German Cholera Commission in Egypt, 1884
Photograph of Koch (third from the right) and other members of the German Cholera Commission in Egypt, 1884
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Scanning electron micrograph of Escherichia coli, a common human pathogen and research organism.
Scanning electron micrograph of Escherichia coli, a common human pathogen and research organism.
An agar plate with bacteria spread by the streak plate method.
An agar plate with bacteria spread by the streak plate method.
Salmonella growing on XLD agar
Salmonella growing on XLD agar
Antonie van Leeuwenhoek, the first person to observe bacteria using a microscope.
Antonie van Leeuwenhoek, the first person to observe bacteria using a microscope.