undulant fever
RareTechnical/Medical
Definition
Meaning
A serious infectious disease caused by bacteria of the genus Brucella, characterized by recurring fevers, muscle pain, and sweating.
An infection transmitted from animals to humans (a zoonosis), typically through unpasteurised dairy products or direct contact with infected livestock, leading to a prolonged, debilitating illness with waves of fever.
Linguistics
Semantic Notes
This is a specific medical term for Brucellosis. While 'fever' is a common word, 'undulant' is highly technical, meaning 'rising and falling like waves' and is almost exclusively used in this context.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. In historical British medical texts, 'Malta fever' or 'Mediterranean fever' were once common synonyms. American texts may reference regional names like 'Bang's disease' (from cattle).
Connotations
Purely medical/clinical in both regions. Carries connotations of rural occupations, veterinary work, or travel to endemic areas.
Frequency
Equally rare and technical in both dialects. More likely to be encountered in medical literature, veterinary contexts, or public health reports than in general speech.
Vocabulary
Collocations
Grammar
Valency Patterns
[Patient] contracted undulant fever from [source].[Undulant fever] causes [symptoms].[Doctor] diagnosed [undulant fever].Vocabulary
Synonyms
Strong
Neutral
Weak
Usage
Context Usage
Business
Not used.
Academic
Used in medical, veterinary, and epidemiological research papers and textbooks.
Everyday
Virtually never used in casual conversation unless discussing a specific medical history.
Technical
The standard term in clinical medicine, veterinary science, and public health for the human infection caused by Brucella species.
Examples
By Part of Speech
verb
British English
- The farmer was thought to have undulated with fever, but it was formally diagnosed as brucellosis.
American English
- The patient was undulating with fever for weeks before testing confirmed Brucella.
adverb
British English
- His temperature rose undulantly over several weeks.
American English
- The fever recurred undulantly, a hallmark of the infection.
adjective
British English
- The patient presented with an undulant fever pattern.
American English
- She had an undulant fever history consistent with brucellosis.
Examples
By CEFR Level
- Undulant fever is a disease you can get from animals.
- The doctor explained that undulant fever, or brucellosis, causes waves of high temperature and fatigue.
- After working with unpasteurised cheese in the region, the veterinarian was hospitalised with a confirmed case of undulant fever.
Learning
Memory Aids
Mnemonic
Imagine a fever chart with waves (undulations) going up and down, which is the classic symptom pattern of this disease.
Conceptual Metaphor
FEVER IS A WAVE (The illness is conceptualised as having a wavy, rising-and-falling pattern).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not translate 'undulant' literally as 'волнующийся' (agitated). It specifically means 'волнообразный' (wavelike) here.
- The direct translation 'волнистая лихорадка' is a calque; the standard medical term in Russian is 'бруцеллёз'.
Common Mistakes
- Misspelling as 'undulent fever' or 'undulating fever'.
- Using it as a general term for any recurring fever.
- Confusing it with typhoid fever or other zoonotic diseases.
Practice
Quiz
What is the most defining clinical feature of undulant fever?
FAQ
Frequently Asked Questions
Yes, 'undulant fever' is the traditional common name for the human disease caused by Brucella bacteria, which is formally called brucellosis.
Most commonly through consuming raw, unpasteurised milk or cheese from infected animals (like goats, sheep, or cows), or through direct contact with infected tissues or fluids from livestock.
In developed countries with strict pasteurisation laws and veterinary controls, it is rare. It is more common in parts of the Mediterranean, Middle East, Asia, and Latin America where such controls may be less stringent.
Yes, it requires prolonged treatment with specific antibiotics. Without treatment, it can become a chronic, debilitating illness.