Related Experiment Videos
Hemagglutination by Staphylococcus saprophyticus and other coagulase-negative staphylococci
J Beuth1, H L Ko, F Schumacher-Perdreau
1Institute of Hygiene, University of Cologne, FRG.
Microbial Pathogenesis
|May 1, 1988
Summary
Surface lectins on Staphylococcus saprophyticus were identified using hemagglutination tests. Different lectins were associated with specific red blood cell types and clinical isolates, offering insights into staphylococcal adhesion.
Area of Science:
- Microbiology
- Bacteriology
- Molecular Biology
Background:
- Coagulase-negative staphylococci (CoNS) are significant human pathogens.
- Surface lectins (hemagglutinins) play a crucial role in bacterial adhesion and pathogenesis.
- Understanding CoNS lectin profiles can aid in differentiating species and understanding their tropism.
Purpose of the Study:
- To characterize the surface lectins of four coagulase-negative staphylococcal species.
- To correlate lectin specificity with red blood cell agglutination patterns.
- To investigate potential links between lectin type, red blood cell agglutination, and clinical source of isolation.
Main Methods:
- Hemagglutination assays were performed on four CoNS species: S. saprophyticus, S. epidermidis, S. haemolyticus, and S. warneri.
- Agglutination patterns were tested against sheep, horse, and rabbit red blood cells (RBC).
- Inhibition assays using specific sugars (N-acetylglucosamine, N-acetylgalactosamine, N-acetylneuraminic acid) were conducted to identify lectin specificities.
Main Results:
- All S. saprophyticus strains agglutinated sheep RBC, inhibited by N-acetylglucosamine (GlcNAc) plus either N-acetylgalactosamine (GalNAc) or N-acetylneuraminic acid (NANA).
- GalNAc-inhibited strains agglutinated horse RBC (common in urinary isolates), while NANA-inhibited strains agglutinated rabbit RBC (common in respiratory isolates).
- Other CoNS species predominantly agglutinated rabbit RBC, with hemagglutination inhibited by NANA or other sugars, not GlcNAc.
Conclusions:
- Distinct hemagglutinin profiles characterize S. saprophyticus strains, correlating with RBC type and clinical origin.
- The identified lectins suggest specific adhesion mechanisms for S. saprophyticus in urinary and respiratory tracts.
- Hemagglutination inhibition provides a valuable method for differentiating CoNS species and understanding their surface properties.