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bacteroides fragilis in Medicine

Bacteroides fragilis

(frăjə-lĭs)
n.
  1. A bacterium that is one of the predominant microorganisms in the lower intestinal tract of humans.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.