plural E. coli
: an enterobacterium (Escherichia coli) that is used in public health as an indicator of fecal pollution (as of water or food) and in medicine and genetics as a research organism and that occurs in various strains that may live as harmless inhabitants of the human lower intestine or may produce a toxin causing intestinal illness see enterobacterium illustration

Examples of E. coli in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
And tests of raw products show that they are frequently contaminated with harmful viruses and bacteria such as salmonella and E. coli. Brenda Goodman, CNN, 18 Jan. 2025 The agency also said the plant exceeded allowable bacteria counts for E. coli three times in January and May of 2020 and May 2021. Angela Palermo, Idaho Statesman, 18 Jan. 2025 In addition, the study results suggest that eating more fiber to support beneficial bacteria may help crowd out harmful bacteria from the Enterobacteriaceae family, including Klebsiella pneumoniae (which can cause pneumonia and meningitis), shigella, and E. coli. Don Rauf, EverydayHealth.com, 14 Jan. 2025 The onion supplier behind a deadly E. coli outbreak linked to McDonald's Quarter Pounders this past fall had numerous health and sanitation violations, including employees with unwashed hands, dirty equipment, and puddles of Listeria bacteria. Ars Technica, 13 Jan. 2025 See all Example Sentences for E. coli 

Word History

First Known Use

1925, in the meaning defined above

Time Traveler
The first known use of E. coli was in 1925

Dictionary Entries Near E. coli

ecol

E. coli

e-collar

Cite this Entry

“E. coli.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/E.%20coli. Accessed 22 Jan. 2025.

Kids Definition

E. coli

noun
plural E. coli
: a bacterium in the shape of a short rod that may cause intestinal illness
Etymology

short for Escherichia coli, the taxonomic name in biology

Medical Definition

E. coli

noun
ˌē-ˈkō-ˌlī
plural E. coli also E. colis
: a straight rod-shaped gram-negative bacterium (Escherichia coli of the family Enterobacteriaceae) that is used in public health as an indicator of fecal pollution (as of water or food) and in medicine and genetics as a research organism and that occurs in various strains that may live as harmless inhabitants of the human lower intestine or may produce a toxin causing intestinal illness marked especially by diarrhea
one million acid-resistant E. coli per gram of fecesJohn Schwartz
this E. coli can survive … longer than all the other E. colisEd Geldreich
Last Updated: - Updated example sentences
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