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Definition of Nonpathogenic

Nonpathogenic: Incapable of causing disease. For example, nonpathogenic E. coli are E. coli bacteria that do not cause disease, but instead live naturally in the large intestine.

Source: MedTerms™ Medical Dictionary
http://www.medicinenet.com/script/main/art.asp?articlekey=14292
Last Editorial Review: 3/19/2012

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