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Branhamella catarrhalis: phenotypic characteristics.

G V Doern1

  • 1Department of Clinical Microbiology, University of Massachusetts Medical Center, North Worcester 01655.

The American Journal of Medicine
|May 14, 1990
PubMed
Summary

Branhamella catarrhalis is easily identified in clinical labs. Its beta-lactamase may be a virulence factor, aiding in understanding Branhamella disease pathogenesis.

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Area of Science:

  • Clinical Microbiology
  • Bacteriology
  • Pathogenesis

Background:

  • Branhamella catarrhalis is a recognized pathogen.
  • Understanding its characteristics is crucial for clinical and epidemiological studies.

Purpose of the Study:

  • To describe phenotypic characteristics of Branhamella catarrhalis.
  • To highlight attributes relevant to laboratory recovery and identification.
  • To discuss factors related to its infection-causing potential and pathogenesis.

Main Methods:

  • Phenotypic characterization of Branhamella catarrhalis.
  • Review of laboratory techniques for isolation and identification.
  • Analysis of methods for strain typing (e.g., restriction endonuclease analysis, beta-lactamase isoelectric focusing).
  • Characterization of lipopolysaccharide and outer membrane proteins.

Main Results:

  • Branhamella catarrhalis is readily isolated and identified using simple laboratory techniques.
  • Restriction endonuclease analysis is valuable for epidemiologic studies.
  • Beta-lactamase isoelectric focusing has limited discriminatory power.
  • Lipopolysaccharide and outer membrane proteins are relatively conserved among strains.

Conclusions:

  • Branhamella catarrhalis is easily identified in clinical settings.
  • Restriction endonuclease analysis is a useful tool for Branhamella catarrhalis epidemiology.
  • Branhamella catarrhalis beta-lactamase is a potential virulence determinant.

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