Definition of pathogen
: a specific causative agent (such as a bacterium or virus) of disease
Recent Examples of pathogen from the Web
Just as insects and pathogens evolve resistance to new pesticides and antibiotics, so gene drives, too, may provoke resistance—and may do so far faster than many suspected.
This bacteria was shown to elicit an immune system response that prevents the growth of pathogens in the eye and keeps microbes at bay.
The best way to clean produce, according to Johnston, is with diluted vinegar: Research suggests its antibacterial properties can significantly reduce pathogens such as Salmonella.
Other potential threats are disease agents like pathogens and harmful algal blooms, habitat loss, reduction in food sources, illegal hunting, pollution and predation, according to the recovery plan.
Since Lyme is a reportable illness, the doctor should send the tick to the health department to be tested for Lyme and other pathogens.
To find out, the researchers turned to biopsies from 14 children and two adults who received intestinal transplants and later developed infections with norovirus, a common gut pathogen.
Lurking pathogens also threaten the global food supply.
A broad look at all viruses known to infect mammals suggests that bats are, indeed, more likely to carry unknown pathogens that can wreak havoc on humans.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pathogen.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of pathogen
International Scientific Vocabulary
First Known Use: 1880See Words from the same year
PATHOGEN Defined for English Language Learners
Definition of pathogen for English Language Learners
medical : something (such as a type of bacteria or a virus) that causes disease
Medical Definition of pathogen
: a specific causative agent (as a bacterium or virus) of disease
Seen and Heard
What made you want to look up pathogen? Please tell us where you read or heard it (including the quote, if possible).