bacteroides
C2Technical/Scientific
Definition
Meaning
A genus of anaerobic, rod-shaped bacteria that are normally found in the human intestine.
Referring to bacteria of this genus, which can be opportunistic pathogens when they spread to other body sites, often associated with abdominal infections, abscesses, and bacteremia.
Linguistics
Semantic Notes
Always used as a proper noun (capitalized) when referring to the genus name in formal scientific contexts. In informal medical speech, often used in the plural ('bacteroides') to refer to the bacteria generally.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or spelling differences. Pronunciation differences follow standard UK/US patterns for the word's structure.
Connotations
Identical negative medical connotation as a potential cause of infection.
Frequency
Equally rare in everyday language, used exclusively in medical, microbiological, and academic contexts in both regions.
Vocabulary
Collocations
Grammar
Valency Patterns
The patient has a [Bacteroides species] infection.The sample tested positive for [Bacteroides].[Bacteroides] are commonly found in the [colon/gut].Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None. The term is strictly technical.”
Usage
Context Usage
Business
Not used.
Academic
Common in microbiology, medical, and life science research papers and textbooks.
Everyday
Virtually never used, except when a patient is diagnosed with a related infection.
Technical
Core term in clinical microbiology, infectious disease, and gastroenterology.
Examples
By Part of Speech
adjective
British English
- Bacteroides bacteraemia is a serious condition.
American English
- Bacteroides bacteremia is a serious condition.
Examples
By CEFR Level
- Some Bacteroides can cause infections after surgery.
- Doctors identified Bacteroides in the lab test.
- Bacteroides fragilis is the most commonly isolated anaerobe from clinical specimens.
- The overuse of certain antibiotics can disrupt the gut's balance, allowing resistant Bacteroides to proliferate.
- Treatment for a Bacteroides abscess often requires both drainage and specific antimicrobial therapy.
Learning
Memory Aids
Mnemonic
Think: 'BACTERia that resIDE in the S colon' -> Bacteroides.
Conceptual Metaphor
Often conceptualized as a 'hidden resident' or 'opportunistic invader' from within the body.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate as 'бактерия' (bacteria) alone, as it is too generic. The specific Latin name 'Bacteroides' is used in Russian medical texts as 'бактероиды'.
- Avoid confusing with 'бациллы' (bacilli), which is a broader morphological group.
Common Mistakes
- Mispronouncing the final '-oides' as '-oideez' with a strong 'z' (it's /diːz/ or /diz/).
- Using it as a common noun without capitalization in formal writing ('a bacteroides').
- Incorrectly treating it as singular in plural contexts (e.g., 'Bacteroides is causing...' vs. 'Bacteroides are causing...').
Practice
Quiz
In which context is the word 'Bacteroides' most appropriately used?
FAQ
Frequently Asked Questions
No, Bacteroides are a normal part of the human gut flora and aid in digestion. They only become pathogenic when they translocate to sterile sites like the bloodstream or peritoneal cavity.
Infections are treated with antibiotics that are effective against anaerobic bacteria, such as metronidazole, carbapenems, or beta-lactam/beta-lactamase inhibitor combinations.
Yes, when referring to the genus name in scientific/formal writing, it should be capitalized and italicized (Bacteroides). In less formal medical notes, it may appear in lowercase.
Yes. 'Bacteroides' is the correct name for the genus. 'Bacteroid' is a more general term that can refer to a rod-shaped bacterium or, in botany, to a type of nitrogen-fixing cell in root nodules.