feb 25, 1872 - Robert Koch 1872 (Germ Theory of Disease, Anthrax)

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Koch grew Anthrax bacteria in an ox eyeball and injected the infected eyeball into a healthy ox to prove that disease comes from germs.

The Germ theory of disease is essentially that disease comes from germs. Koch was able to match many diseases with specific microbes.

The Germ Theory of Disease has 4 essential rules known as Koch's postulates. They are as follow according to Medicinenet.com;

"1. The bacteria must be present in every case of the disease.
2. The bacteria must be isolated from the host with the disease and grown in pure culture.
3. The specific disease must be reproduced when a pure culture of the bacteria is inoculated into a healthy susceptible host.
4. The bacteria must be recoverable from the experimentally infected host."

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