Proteus vulgaris

[vŭl-gârĭs]
n.
  1. A bacterium found in putrefying materials and in abscesses; it includes strains that agglutinate in typhus serum and are therefore used in diagnosis of typhus.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.