nalidixic acid
Very Low (C2+)Highly technical/medical
Definition
Meaning
A synthetic antibacterial agent primarily used to treat urinary tract infections.
A quinolone antibiotic that inhibits bacterial DNA replication, historically significant as the first of its class but largely replaced by newer fluoroquinolones in modern practice.
Linguistics
Semantic Notes
The term refers specifically to a pharmaceutical compound. It is not used in general language and carries no metaphorical meaning. It belongs to a closed, specialist lexicon.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or usage differences. Prescription practices and brand names may vary by region.
Connotations
None beyond its technical medical meaning.
Frequency
Equally low frequency in both dialects, confined strictly to medical/ pharmaceutical contexts.
Vocabulary
Collocations
Grammar
Valency Patterns
Nalidixic acid is used for [infection type]The patient was given nalidixic acidResistance to nalidixic acid is commonVocabulary
Synonyms
Neutral
Weak
Usage
Context Usage
Business
Not used.
Academic
Used in medical and pharmacology papers, often in historical context or discussing antibiotic resistance mechanisms.
Everyday
Not used. A doctor might say 'an antibiotic for your waterworks infection'.
Technical
Precisely used in clinical notes, pharmacology texts, and microbiology reports concerning Gram-negative bacteria.
Examples
By Part of Speech
adjective
British English
- nalidixic-acid-resistant strains
American English
- nalidixic acid susceptibility
Examples
By CEFR Level
- Nalidixic acid is an older antibiotic for urinary infections.
- Some bacteria are no longer killed by nalidixic acid.
- Due to high resistance rates, nalidixic acid is seldom a first-line therapeutic choice for acute cystitis.
- The study compared the plasmid-mediated quinolone resistance genes selected by nalidixic acid and ciprofloxacin.
Learning
Memory Aids
Mnemonic
Think: 'NAL' (like 'nail' the infection) + 'IDIXIC' (sounds like 'addicts' – bacteria addicted to it can become resistant) + ACID (a type of chemical compound).
Conceptual Metaphor
Not applicable; the term is a technical label without metaphorical conceptualisation.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid translating 'acid' as 'кислота' in isolation, as it refers to the specific compound name, not a corrosive substance. The full term 'налидиксовая кислота' is the standard equivalent.
- Do not parse it as a descriptive phrase; it is a fixed pharmaceutical name.
Common Mistakes
- Mispronouncing as 'nal-ee-DIX-ic' (correct stress is on 'dix').
- Misspelling as 'nalidxic acid' or 'naladixic acid'.
- Using it as a general term for antibiotics.
Practice
Quiz
In which field would you exclusively encounter the term 'nalidixic acid'?
FAQ
Frequently Asked Questions
No, its use has declined significantly due to the development of bacterial resistance and the availability of more effective and safer fluoroquinolones.
It was primarily used for uncomplicated urinary tract infections caused by susceptible Gram-negative bacteria like E. coli.
It was the first commercially available quinolone antibiotic, discovered in 1962, paving the way for an important class of synthetic antibacterials.
It is a prescription-only medicine and may not be routinely stocked, given its largely historical role in many formularies.