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Bacterial adherence to epithelial cells in the nasopharynx in children
Insights
Bacteria readily attach to soft palate cells and secretions but rarely to adenoid cells in children. This suggests adenoid tissue may resist bacterial colonization, unlike other nasopharyngeal surfaces.
Area of Science:
- Microbiology
- Cell Biology
- Otorhinolaryngology
Background:
- Bacterial adherence to epithelial cells is crucial for colonization and infection.
- The nasopharynx harbors diverse bacteria, but their interaction with specific epithelial surfaces is not fully understood.
- Adenoid tissue is a common site for bacterial reservoirs and recurrent infections in children.
Purpose of the Study:
- To investigate the differential adherence of bacteria to various nasopharyngeal epithelial surfaces in children.
- To compare bacterial attachment to soft palate squamous cells, adenoid epithelial cells, and adenoid secretions.
- To assess the extent of bacterial infiltration within adenoid tissue.
Main Methods:
- Microscopic examination of epithelial cells and secretions from 10 children undergoing adenoidectomy.
- Differential interference contrast microscopy to visualize bacteria-epithelial cell interactions.
- Histological analysis of adenoid tissue sections to evaluate bacterial infiltration.
Main Results:
- Significant bacterial attachment observed on mature squamous epithelial cells from the soft palate and in adenoid secretions.
- Rare bacterial attachment to adenoid epithelial cells.
- Microscopic analysis revealed microridges on bacteria-carrying epithelial cells, characteristic of mature squamous cells.
- Adenoid tissue sections showed minimal to no bacterial infiltration.
Conclusions:
- Mature squamous epithelial cells of the soft palate and adenoid secretions support substantial bacterial adherence.
- Adenoid epithelial cells exhibit limited bacterial attachment, suggesting a potential resistance mechanism.
- Bacterial infiltration into adenoid tissue is minimal in this patient group, contrasting with surface adherence patterns.
Abstract:
The presence of attached bacteria to epithelial cells from the nasopharyngeal surface of the soft palate, from the adenoid surface and from the secretions covering the adenoid was studied in 10 children undergoing adenoidectomy. Large numbers of bacteria were seen to attach to mature normal squamous epithelial cells from the soft palate and in the secretions, whereas attachment to adenoid epithelial cells was rare. Using differential interference contrast microscopy, bacteria-carrying epithelial cells were seen to have their surface covered by microridges characteristic of normal mature squamous epithelial cells. Sections of adenoid tissue showed bacterial infiltration of adenoid tissue to be virtually nonexistent in the patient group.