Last modified on 23 May 2014, at 19:34

pathogen

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EtymologyEdit

From patho- +‎ -gen.

NounEdit

pathogen (plural pathogens)

  1. (pathology, immunology) Any organism or substance, especially a microorganism, capable of causing disease, such as bacteria, viruses, protozoa or fungi. Microorganisms are not considered to be pathogenic until they have reached a population size that is large enough to cause disease.
    • 2013 January 1, Katie L. Burke, “Ecological Dependency”, American Scientist, volume 101, number 1, page 64: 
      In his first book since the 2008 essay collection Natural Acts: A Sidelong View of Science and Nature, David Quammen looks at the natural world from yet another angle: the search for the next human pandemic, what epidemiologists call “the next big one.” His quest leads him around the world to study a variety of suspect zoonoses—animal-hosted pathogens that infect humans.

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