pathogen

Definitions

A bacterium, virus, or other microorganism that can cause disease.

Any agent, such as a parasite or fungus, capable of producing disease in its host.

Examples

The scientist spent years studying how the pathogen spreads through contaminated water sources.

Handwashing is one of the most effective ways to prevent the transmission of a dangerous pathogen.

Synonyms

germ microbe virus bacterium infectious agent disease-causing organism

Antonyms

probiotic beneficial microbe harmless organism antiseptic agent