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Bacteroides uniformis

  • General information

    • the following information is not yet verified
      Bacteroides fragilis group, are the most frequently encountered anaerobes in clinical specimens.

      They tend to be more virulent and drug resistant than most other anaerobes.

      Therefore it is important to identify members of the B. fragilis group
      Of these especially B. fragilis, B. thetaiotaomicron, and B. ovatus are highly relevant in human infections.

      Taxonomy
      Family: Bacteroidaceae

      Natural habitats
      They inhabit the mucosal surfaces of the oral cavity, gastrointestinal tract and the gut of animals and human.

      Clinical significance
      They are involved in a variety of infections associated with considerable morbidity and mortality.

      Anaerobic bacteria can occasionally spread to the adjacent tissues and the bloodstream with serious consequences.

      In cases when gram negatives anaerobes gain entrance to the bloodstream and trigger a systemic inflammatory response, this may result in a sepsis or infective endocarditis with a fatal outcome.

  • Gram stain

    • the following information is not yet verified
      Light colored, short, Gram negative rods,

      0.5-0.8 x 1.5-4.5 µm,

      with rounded ends, lying alone or in pairs.

      Liquid medium:
      cells tend to be pleomorphic often with vacuoles

  • Culture characteristics

    • the following information is not yet verified

      Obligate anaerobic

      BBAØ
      The colonies are gray, circular, convex and entire

      BBEØ
      growth with grey or black colonies > 1 mm and causing browning of the medium as a result of esculin hydrolysis

      Except for B. vulgatus (pale colonies)

      Fluorescence under long-wave UV light (Woods lamp)
      Negative

  • Characteristics

  • References


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