Etymology
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E. coli (n.)

bacteria inhabiting the gut of man and animals, by 1921, short for Escherichia coli (1911), named for German physician Theodor Escherich (1857-1911) with Latin genitive of colon "colon" (see colon (n.2)).

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Salmonella (n.)

1913, the genus name, coined 1900 in Modern Latin by Joseph Lignières, French-born Argentine bacteriologist, in reference to U.S. veterinary surgeon Daniel E. Salmon (1850-1914), who isolated a type of the bacteria in 1885.

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