e. coli
Medium (Common in scientific, medical, and news contexts; rare in everyday conversation)Technical/Scientific, Journalistic
Definition
Meaning
A species of bacterium (Escherichia coli) commonly found in the intestines of humans and animals. While many strains are harmless, some can cause serious food poisoning and infections.
Often used as a metonym for fecal contamination, water/food safety issues, or scientific research. In microbiology, it's a model organism for genetic and biochemical studies.
Linguistics
Semantic Notes
The term is neutral and taxonomic, but in public discourse, it strongly connotes disease, contamination, and outbreak. The full scientific name 'Escherichia coli' is used in formal writing; 'E. coli' is the standard abbreviated form.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and pronunciation are consistent.
Connotations
Identical in both varieties, primarily associated with food poisoning and hygiene scandals.
Frequency
Equally frequent in relevant contexts (news, science).
Vocabulary
Collocations
Grammar
Valency Patterns
An outbreak of E. coli was reported.The water was tested for E. coli.The strain of E. coli proved to be deadly.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None specific. Sometimes used in phrases like 'the E. coli scare of 2011'.”
Usage
Context Usage
Business
Used in risk management, food industry reports, and public relations (e.g., 'The recall was due to potential E. coli contamination').
Academic
Used in microbiology, genetics, medicine, and public health research (e.g., 'The plasmid was inserted into E. coli').
Everyday
Used in news reports about food recalls or restaurant closures (e.g., 'The lettuce was linked to an E. coli outbreak').
Technical
Precise reference to specific strains (e.g., E. coli O157:H7), laboratory procedures, and pathogenicity mechanisms.
Examples
By Part of Speech
verb
British English
- The lab will culture the E. coli overnight.
- The sample was tested and found to be E. coli positive.
American English
- The researchers transformed the E. coli with the new gene.
- The lettuce was implicated in E. coli poisoning dozens.
adverb
British English
- Not applicable as E. coli is not used as an adverb.
American English
- Not applicable as E. coli is not used as an adverb.
adjective
British English
- The E. coli outbreak was traced to a farm.
- They issued an E. coli warning for the coastal waters.
American English
- The E. coli contamination led to a massive recall.
- He was hospitalized with an E. coli infection.
Examples
By CEFR Level
- E. coli can make you very sick.
- They found E. coli in the water.
- The news reported an E. coli outbreak from contaminated salad.
- E. coli bacteria live in the intestines.
- Public health officials are investigating the source of the E. coli infection.
- Not all strains of E. coli are dangerous; some are part of normal gut flora.
- The virulence of the enterohemorrhagic E. coli strain is due to Shiga toxin production.
- The study used a genetically modified E. coli as a protein expression system.
Learning
Memory Aids
Mnemonic
Think: 'E. coli' sounds like 'Echo lie' – a false echo in your gut that makes you ill.
Conceptual Metaphor
INVISIBLE ENEMY / CONTAMINANT AS INVADER (e.g., 'E. coli lurking in the food', 'battling an infection').
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate as 'кишечная палочка' in English texts. Use 'E. coli'. It is a proper Latin name.
- Avoid using a Cyrillic 'е' or treating it as a regular word; it is an abbreviation with a period.
Common Mistakes
- Misspelling as 'e-coli', 'ecoli', or 'E Coli'. Correct form: 'E. coli'.
- Incorrect plural: 'E. colis'. The plural is 'E. coli' (same form).
- Using it as a countable noun for a single bacterium: 'an E. coli' is acceptable, but 'a strain of E. coli' is more precise.
Practice
Quiz
Which of the following is the correct written form?
FAQ
Frequently Asked Questions
No, most E. coli strains are harmless and are a normal part of the human intestinal flora. Only certain pathogenic strains cause illness.
In British English, it's /ˌiː ˈkəʊ.laɪ/. In American English, it's /ˌi ˈkoʊ.laɪ/. It is pronounced letter 'E' followed by 'coli' (like 'coal-eye').
E. coli reproduces quickly, is easy and inexpensive to culture, and its genetics are well understood, making it a fundamental 'model organism' for molecular biology and biotechnology.
Undercooked ground beef, raw milk, contaminated water, raw vegetables, and unpasteurized juices. Person-to-person contact is also a route of transmission.