pathogen
noun
path·o·gen
ˈpa-thə-jən 
: a specific causative agent (such as a bacterium or virus) of disease
Examples of pathogen in a Sentence
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Sette is considered an expert on human T cells, the immune cells that adapt to recognize and fight infections from viruses, bacteria, parasites and other pathogens.
—
Noah Lyons, San Diego Union-Tribune, 27 Jan. 2026
People should avoid swimming when warnings are posted so as to reduce their exposure to harmful pathogens.
—Ethan Stone, Ascend Agency, 25 Jan. 2026
Creating a ring of immunity in this way limits a pathogen’s ability to infect others.
—Helen Branswell, STAT, 25 Jan. 2026
These diseases still affect populations today, making this discovery significant for understanding the history of this pathogen.
—Maria Mocerino, Interesting Engineering, 24 Jan. 2026
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Noah Lyons, San Diego Union-Tribune, 27 Jan. 2026
People should avoid swimming when warnings are posted so as to reduce their exposure to harmful pathogens.
—Ethan Stone, Ascend Agency, 25 Jan. 2026
Creating a ring of immunity in this way limits a pathogen’s ability to infect others.
—Helen Branswell, STAT, 25 Jan. 2026
These diseases still affect populations today, making this discovery significant for understanding the history of this pathogen.
—Maria Mocerino, Interesting Engineering, 24 Jan. 2026
See All Example Sentences for pathogen
Cite this Entry
“Pathogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pathogen. Accessed 31 Jan. 2026.
Copy CitationMedical Definition
pathogen
noun
patho·gen
ˈpath-ə-jən
: a specific causative agent (as a bacterium or virus) of disease
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