pathogen
UK: ˈpæθədʒən | US: ˈpæθədʒən
n. a bacterium, virus, or other microorganism that can cause disease.
The word "pathogen" combines two Greek-derived morphemes:
- "patho" (from Greek pathos, meaning "suffering" or "disease")
- "gen" (from Greek -genēs, meaning "producer" or "origin").
Originally used in late 19th-century medical contexts, "pathogen" literally means "disease producer." The term reflects the scientific understanding of microorganisms as causal agents of illness, aligning with the Germ Theory of Disease. The morphemes preserve their original Greek meanings while adapting to modern medical terminology.
Scientists study how pathogens evolve to resist antibiotics.
Proper handwashing can reduce exposure to harmful pathogens.
The lab identified the pathogen responsible for the outbreak.
Some pathogens spread rapidly in crowded environments.
Vaccines train the immune system to recognize specific pathogens.