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Fireside conference 11. Common cold.

B Winther1, R Kawana, H Saito

  • 1Department of ORL, Gentofte Hospital, University of Copenhagen, Denmark.

Rhinology. Supplement
|January 1, 1992
PubMed
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This study challenges the idea that viruses destroy nasal lining during colds. Instead, symptoms may stem from inflammatory responses in the nasopharynx, particularly the adenoids, rather than bacterial infections.

Area of Science:

  • Virology
  • Immunology
  • Rhinology

Background:

  • The common cold is often attributed to viral destruction of nasal epithelium, potentially leading to secondary bacterial infections.
  • This widely accepted theory lacks robust evidence, particularly concerning rhinovirus infections.

Purpose of the Study:

  • To investigate the pathogenesis of rhinovirus colds and challenge the prevailing notion of epithelial destruction.
  • To explore alternative mechanisms for cold symptom development, focusing on the nasopharynx and inflammatory responses.

Main Methods:

  • In vivo and in vitro studies examining nasal epithelial damage during viral infections (influenza, adenovirus, rhinovirus).
  • Analysis of nasal mucosa, secretions, and bacterial flora during natural colds.
  • Investigation of the nasopharynx, including adenoid tissue and ICAM-1 receptor expression.

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Main Results:

  • No significant nasal epithelial destruction was observed in natural or experimental rhinovirus colds.
  • Neutrophil infiltration in nasal mucosa appears to be a direct viral response, not indicative of bacterial infection.
  • Purulent nasal secretions did not correlate with changes in aerobic bacterial flora.
  • The nasopharynx, rich in lymphoid tissue (adenoids), shows potential for rhinovirus entry via ICAM-1 receptors.

Conclusions:

  • Viral-induced nasal epithelial destruction is not the primary cause of common cold symptoms.
  • Symptoms may arise from inflammatory mediators released from the adenoids in the nasopharynx.
  • Rhinovirus infection pathogenesis warrants further investigation in the nasopharyngeal region.