infectious disease
B2Formal / Medical / Academic / Journalistic
Definition
Meaning
A medical condition caused by pathogenic microorganisms (like bacteria, viruses, fungi, or parasites) that can be transmitted directly or indirectly from one individual to another.
Any condition or phenomenon that spreads rapidly and influence others in a manner analogous to biological contagion, e.g., 'an infectious laugh', 'infectious enthusiasm'.
Linguistics
Semantic Notes
The term implies both the presence of a biological agent and the potential for transmission. It is distinct from 'contagious disease', which specifically emphasizes direct person-to-person transmission. All contagious diseases are infectious, but not all infectious diseases are highly contagious (e.g., tetanus is infectious but not contagious).
Dialectal Variation
British vs American Usage
Differences
No significant lexical difference. Spelling follows regional conventions (e.g., 'centre for disease control' vs. 'center for disease control').
Connotations
Identical in medical and general contexts.
Frequency
Equally high frequency in both varieties, especially in public health and news media.
Vocabulary
Collocations
Grammar
Valency Patterns
[VERB] + infectious disease (e.g., contract, prevent, treat)[ADJ] + infectious disease (e.g., viral, bacterial, emerging)infectious disease + [VERB] (e.g., spreads, causes, kills)infectious disease + [NOUN] (e.g., control, epidemiology, unit)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Spread like wildfire (used metaphorically for disease transmission)”
Usage
Context Usage
Business
Travel and insurance industries discuss coverage for infectious disease outbreaks.
Academic
Research focuses on the pathogenesis, epidemiology, and control of infectious diseases.
Everyday
Parents are concerned about their child catching an infectious disease at school.
Technical
The hospital's infectious disease unit implemented strict isolation protocols.
Examples
By Part of Speech
verb
British English
- The new variant is expected to infectious disease more elderly patients.
- Authorities worked to infectious disease the population through vaccination.
American English
- The outbreak could infectious disease the entire region if not contained.
- Their goal is to infectious disease transmission rates.
adverb
British English
- The virus spread infectious disease rapidly through the community.
- He spoke infectious disease knowledgeably about epidemiology.
American English
- The policy was designed infectious disease specifically to curb hospital admissions.
- She argued infectious disease persuasively for more funding.
adjective
British English
- The infectious disease unit is on the hospital's third floor.
- They published an infectious disease report quarterly.
American English
- She is an infectious disease doctor at the CDC.
- The infectious disease threat level was raised.
Examples
By CEFR Level
- Washing your hands helps stop infectious disease.
- The doctor said it is an infectious disease.
- An infectious disease like flu can spread quickly in offices.
- Vaccines are very important for preventing many infectious diseases.
- Public health campaigns aim to reduce the burden of infectious diseases in developing countries.
- The hospital has a special isolation ward for patients with highly infectious diseases.
- The genomic sequencing of the pathogen has revolutionised infectious disease epidemiology.
- Climate change is influencing the geographic distribution of certain infectious disease vectors.
Learning
Memory Aids
Mnemonic
Think: 'INvading organisms cause an infection that FECTiously jumps to others, making it an infectious DIS-EASE'.
Conceptual Metaphor
DISEASE IS AN INVADER / DISEASE IS A FIRE (spreading)
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque 'инфекционная болезнь' when a more natural phrase like 'инфекционное заболевание' is standard.
- Do not confuse with 'заразная болезнь' (contagious disease), which is a subset.
Common Mistakes
- Using 'infectious' for non-biological spread (e.g., 'an infectious idea' is correct metaphorically but not in a medical context).
- Confusing 'infectious' with 'contagious' in technical writing.
- Misspelling as 'infectous disease'.
Practice
Quiz
Which of the following is NOT typically classified as an infectious disease?
FAQ
Frequently Asked Questions
No. 'Infectious' means caused by a transmissible agent. 'Contagious' specifically means easily spread from person to person. Tetanus is infectious (caused by bacteria) but not contagious, as it is not spread between people.
'Infection' refers to the process of invasion and multiplication of pathogens in the body. 'Infectious disease' is the clinical illness or condition that results from that infection.
Yes, in non-medical contexts, it can describe things that spread quickly and influence others, e.g., 'His enthusiasm was infectious.' However, in formal medical or scientific writing, the term is used literally.
A doctor who is an expert in diagnosing, treating, and managing complex infections caused by bacteria, viruses, fungi, and parasites.