Related Experiment Videos

Positive reaction in mouse ligated intestinal loop assay with nonenterotoxigenic and nonhemolytic strains of

T Sakaguchi1, S Sakaguchi, I Nakamura

  • 1Department of Hygiene, Marianna University School of Medicine, Kawasaki, Japan.

Journal of Clinical Microbiology
|March 1, 1988
PubMed

Insights

Nonenterotoxigenic Staphylococcus aureus strains showed invasive potential in mouse models, except those lacking egg yolk reactions. These findings highlight bacterial invasion capabilities beyond typical toxin production.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Bacterial Pathogenesis

Background:

  • Staphylococcus aureus is a common pathogen.
  • Understanding its invasive mechanisms is crucial for disease control.
  • Nonenterotoxigenic and nonhemolytic strains may possess distinct pathogenic traits.

Purpose of the Study:

  • To investigate the invasive potential of nonenterotoxigenic and nonhemolytic Staphylococcus aureus strains.
  • To correlate invasive ability with specific bacterial characteristics.

Main Methods:

  • Utilized the mouse intestinal loop assay to assess bacterial invasion.
  • Evaluated bacterial adherence and inclusion in HeLa cells.
  • Assessed egg yolk reaction as a potential indicator.

Main Results:

  • Most nonenterotoxigenic, nonhemolytic S. aureus strains induced edema, swelling, and increased bacterial load in mouse intestinal loops.
  • A strain negative for the egg yolk reaction did not elicit a positive response in the mouse intestinal loop assay.
  • Significant bacterial adhesion and inclusion within HeLa cells were observed for positive strains.

Conclusions:

  • Nonenterotoxigenic and nonhemolytic Staphylococcus aureus strains can exhibit invasive properties.
  • The egg yolk reaction may be a relevant factor in predicting the invasive capability of these strains.
  • Further research into the mechanisms of invasion for these S. aureus strains is warranted.

Related Concept Videos