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Hemagglutination properties of Enterococcus

M da G Carvalho1, L M Teixeira

  • 1Institute of Microbiology, Federal University of Rio de Janeiro, Brazil.

Current Microbiology
|May 1, 1995
PubMed
Summary
This summary is machine-generated.

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Most enterococcal strains agglutinate rabbit erythrocytes, indicating common hemagglutination properties. These interactions involve bacterial hemagglutinins binding to sialic acid receptors on erythrocytes.

Area of Science:

  • Microbiology
  • Immunology

Background:

  • Enterococci are common bacteria with diverse species.
  • Hemagglutination is a key interaction between microorganisms and host cells.

Purpose of the Study:

  • To investigate the hemagglutination activity of various enterococcal species.
  • To characterize the nature of enterococcal hemagglutinins and their receptors.

Main Methods:

  • Testing 86 enterococcal strains for hemagglutination of human, sheep, and rabbit erythrocytes.
  • Enzyme (trypsin, neuraminidase) and heat treatments of erythrocytes and bacteria.
  • Inhibition assays using various sugars, fetuin, and other compounds.

Main Results:

  • 94.2% of enterococcal strains agglutinated rabbit erythrocytes, with titers ranging from 2 to 64.

Related Experiment Videos

  • Hemagglutination activity was lost upon enzymatic treatment of erythrocytes and bacterial suspensions.
  • Fetuin was the only effective inhibitor, suggesting interaction with sialic acid-containing receptors.

    • Conclusions:

    • Hemagglutination is a prevalent characteristic across enterococcal species.
    • Enterococci possess hemagglutinins (proteic and non-proteic) that bind to sialic acid receptors on rabbit erythrocytes.