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Bacteroides fragilis: an exogenous pathogen?

R M Domingues1, M De Oliveira, R Hirata Júnior

  • 1Instituto de Microbiologia, Centro de Ciências de Saúde, Universidade Federal do Rio de Janeiro, Brasil.

Zentralblatt Fur Bakteriologie : International Journal of Medical Microbiology
|April 1, 1995
PubMed
Summary

Bacteroides fragilis strains from infections and water showed similar abscess-inducing abilities and surface traits. This suggests Bacteroides fragilis may act as an external pathogen, originating from environmental sources.

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Environmental Health

Background:

  • Bacteroides fragilis is an opportunistic pathogen.
  • Understanding the origin and transmission of B. fragilis is crucial for infection control.

Purpose of the Study:

  • To investigate potential biological relationships among Bacteroides fragilis strains from different sources.
  • To explore the hypothesis that B. fragilis can act as an exogenous pathogen.

Main Methods:

  • Comparative analysis of thirteen Bacteroides fragilis strains.
  • Isolation from contaminated water and human infections (intestinal and non-intestinal).
  • Assessment of abscess-inducing capacity and surface properties.

Main Results:

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  • Similar profiles observed between water-isolated and infection-associated strains.
  • Comparable capacity for inducing abscesses was noted.
  • Shared surface properties were identified between the two groups.

Conclusions:

  • The findings support the hypothesis of Bacteroides fragilis acting as an exogenous pathogen.
  • Environmental sources, such as contaminated water, may contribute to B. fragilis infections.
  • Further research into environmental reservoirs of B. fragilis is warranted.