Bacteroides melaninogenicus

[mə-lăn′ə-nō-jĕnĭ-kəs]
n.
  1. A bacterium found in the mouth, in feces, and in infections of the respiratory, urogenital, or intestinal tracts, pathogenic only in association with other microorganisms.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.