pathogen
PATH-uh-jin
/ˈpæθ.ə.dʒən/
A bacterium, virus, fungus, or other microorganism that can cause disease.
Refers specifically to living or self-replicating biological organisms that produce disease in a host, unlike non-replicating chemical toxins.
The story behind the word. Coined in the late 19th century as germ theory revolutionized medicine, 'pathogen' fuses the Greek 'pathos' (suffering or disease) with the suffix '-genes' (producer). It literally translates to 'that which generates suffering.'
Word relationships
- germ: Germ is an informal, non-scientific everyday term, whereas pathogen is a formal biological classification.
- microorganism: Microorganism includes harmless or beneficial microbes, whereas a pathogen specifically causes disease.
- probiotic: A probiotic is a beneficial organism that promotes health rather than causing disease.
Commonly confused with
- toxin: A pathogen is a living or replicating biological organism, while a toxin is a non-living poisonous chemical substance produced by organisms or synthesized.
Word family
- pathogenic (adjective): Capable of causing disease.
- pathogenicity (noun): The property or capacity of producing disease.
Collocations
- airborne pathogen
- bloodborne pathogen
- virulent pathogen
- pathogen isolation
Example sentences
- "The lab confirmed that the weaponized aerosol contained a genetically modified bacterial pathogen designed to resist standard antibiotics." Military Biodefense Analysis
- "Bacillus anthracis is a spore-forming pathogen capable of surviving harsh environmental conditions for decades." Scientific Literature
Memory hook
Think of PATH to AGONY: a PATHogen sets a patient on a path to agony. Generates suffering.
When not to use
Do not use for chemical poisons or inert toxic substances like arsenic or cyanide; use 'toxin' or 'poison' instead.
Fun facts
- Not all bacteria are pathogens—less than 1% of known bacterial species actually cause disease in humans.
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