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[Electron microscopic investigations on encapsulated Staphylococci (author's transl)]
Zentralblatt Fur Bakteriologie, Parasitenkunde, Infektionskrankheiten Und Hygiene. Erste Abteilung Originale. Reihe A: Medizinische Mikrobiologie Und Parasitologie
|March 1, 1976
Summary
Electron microscopy revealed distinct surface differences between encapsulated and non-encapsulated staphylococci. Encapsulated strains exhibited a hazy surface due to capsular components, while non-encapsulated strains showed a smooth cell wall.
Area of Science:
- Microbiology
- Cell Biology
- Microscopy
Context:
- Staphylococci are significant human pathogens.
- Bacterial capsules play a role in virulence and immune evasion.
- Understanding bacterial surface structures is crucial for developing effective treatments.
Purpose:
- To investigate the ultrastructural surface characteristics of encapsulated staphylococci using electron microscopy.
- To differentiate between encapsulated and non-encapsulated staphylococci based on their surface morphology.
- To evaluate the effectiveness of different electron microscopy techniques in visualizing staphylococcal capsules.
Summary:
- Electron microscopy with osmium tetroxide fixation revealed a 'hazy' cell-surface in encapsulated staphylococci, attributed to capsular components.
- Non-encapsulated staphylococci presented a 'smooth' cell wall surface.
- Immune ferritin technique corroborated these findings, and negative contrasting with ferritin clearly demonstrated the staphylococcal capsules. The capsules did not significantly enlarge upon reaction with homologous antiserum.
Impact:
- Provides detailed ultrastructural insights into staphylococcal surface architecture.
- Highlights the utility of electron microscopy and specific techniques for bacterial capsule visualization.
- Contributes to the understanding of bacterial surface structures relevant to pathogenesis and host-pathogen interactions.