European Journal of Clinical Microbiology

, Volume 3, Issue 3, pp 207–209 | Cite as

Pathogenicity of piliated and encapsulatedBacteroides fragilis

  • I. Brook
  • J. C. Coolbaugh
  • R. I. Walker
Short Reports


Of 20 isolates of theBacteroides fragilis group, only three were encapsulated (C+) and these induced abscesses in mice. After coinoculation with live, formalized or capsular material from other bacteria seven other isolates formed abscesses. TheBacteroides recovered from these abscesses were C+; those that had been inoculated withKlebsiella had pili-like and bacteriophage-like structures. Once encapsulated, theBacteroides isolates induced abscesses when injected alone.


Internal Medicine Capsular Material 
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Copyright information

© Vieweg Publishing 1984

Authors and Affiliations

  • I. Brook
    • 1
  • J. C. Coolbaugh
    • 1
  • R. I. Walker
    • 1
  1. 1.Naval Medical Research InstituteNational Naval Medical CenterBethesdaUSA

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