pathogen

noun

path·​o·​gen ˈpa-thə-jən How to pronounce pathogen (audio)
: a specific causative agent (such as a bacterium or virus) of disease

Examples of pathogen in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
However, Tulane officials later confirmed the monkeys had recently received health screenings and were pathogen-free. Stephen Sorace, FOXNews.com, 3 Nov. 2025 Removes waterborne pathogens and filters pesticides, chemicals, heavy metals and microplastics and improves taste, smell and clarity. Deanna Taylor, USA Today, 30 Oct. 2025 Tulane University said Wednesday that the monkeys had recently been tested and were confirmed to be pathogen-free. Gabe Whisnant, MSNBC Newsweek, 29 Oct. 2025 The researchers used human lung epithelial cells, which line the respiratory tract and serve as a defense against inhaled pathogens and particles. New Atlas, 25 Oct. 2025 See All Example Sentences for pathogen

Word History

Etymology

patho- + -gen, after pathogenic, pathogenesis

First Known Use

1880, in the meaning defined above

Time Traveler
The first known use of pathogen was in 1880

Browse Nearby Words

Cite this Entry

“Pathogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pathogen. Accessed 8 Nov. 2025.

Kids Definition

pathogen

noun
patho·​gen
ˈpath-ə-jən
: a germ (as a bacterium or virus) that causes disease

Medical Definition

pathogen

noun
patho·​gen ˈpath-ə-jən How to pronounce pathogen (audio)
: a specific causative agent (as a bacterium or virus) of disease

More from Merriam-Webster on pathogen

Last Updated: - Updated example sentences
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