pathogen
PATH-uh-jin
/ˈpæθədʒən/
A bacterium, virus, fungus, or other microorganism that can cause disease.
Refers directly to the biological agent that inflicts harm, distinct from environmental toxins or genetic defects.
The story behind the word. Coined in the 19th century as germ theory revolutionized medicine, blending Greek 'pathos' (suffering) with '-genes' (born of or producing). It literally translates to 'that which generates suffering'.
Word relationships
- infectious agent: 'Infectious agent' is a two-word descriptive term, whereas 'pathogen' is the formal biological noun.
- germ: 'Germ' is an informal, colloquial term; 'pathogen' is precise and scientific.
- probiotic: A probiotic is a beneficial microorganism, whereas a pathogen causes disease.
- antibody: An antibody neutralizes foreign invaders, whereas a pathogen is the invader itself.
Commonly confused with
- carcinogen: A pathogen is an infectious biological agent, whereas a carcinogen is any substance (chemical or physical) that causes cancer.
Word family
- pathogenic (adjective): Capable of causing disease.
- pathogenicity (noun): The ability of a microorganism to cause disease.
Collocations
- airborne pathogen
- bloodborne pathogen
- bacterial pathogen
- pathogen transmission
Example sentences
- "Proper handwashing eliminates the bloodborne pathogen before it can infect host cells." Public health advisory.
- "The novel airborne pathogen mutated rapidly, making vaccine design particularly demanding." Microbiology research.
Memory hook
PATHogen: A pathogen opens a 'PATH' for 'disease' to enter your body. Pathogen = Patho (disease) + gen (generator).
When not to use
Do not use 'pathogen' to describe non-biological causes of illness like lead poisoning or radiation exposure.
Fun facts
- Fewer than 1% of all bacterial species on Earth are actual human pathogens.
Related words
Also appears in
- Technology → Medicine & Biotechnology
- Health Sciences → Immunology & Clinical Genetics
- Health Sciences → Epidemiology & Public Health
- Food Science & Culinary Craft → Food Safety & Contamination
- Health Sciences → Global Pandemics & Disease Control
- Military Science & Warfare → Biological & Chemical Weapons
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