Definition of "nonpathogenic" [nonpathogenic]

• Not pathogenic. (adjective)

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• "They start out as industrial yeast or nonpathogenic strains of E. coli, but LS9 modifies them by custom-de-signing their DNA."
• "In a 1992 report, researchers described seven such patients and concluded they shared a "nonpathogenic strain" of HIV."
• "LS9, a Silicon Valley company doing energy research, has found a way to modify a nonpathogenic strain of E. coli so that it creates the equivalent of crude oil as a byproduct of eating agricultural waste."