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Related Concept Videos

Microbiota of the Respiratory Tract01:29

Microbiota of the Respiratory Tract

41
The human respiratory tract, comprising the upper and lower segments, serves as a critical interface with the external environment. The upper respiratory tract (URT)—including the nostrils, sinuses, pharynx, and oropharynx—is heavily colonized by microbes, while the lower respiratory tract (LRT), composed of the larynx, trachea, bronchi, and lungs, was long thought to be sterile. However, recent molecular studies have revealed that the lungs are not devoid of microbes but act more...
41

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Sinonasal microbiome sampling: a comparison of techniques.

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Summary

Swab samples accurately represent the sinonasal microbiome, similar to mucosal tissue. This finding supports using less invasive swabs for future chronic rhinosinusitis (CRS) microbiome research.

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Area of Science:

  • Microbiology
  • Genomics
  • Bioinformatics

Background:

  • The role of the sinonasal microbiome in chronic rhinosinusitis (CRS) is not fully understood.
  • Hypothesis: Bacteria in mucosal biofilms may differ from free-floating bacteria, impacting microbiome study results.
  • This study compares the microbiota of sinonasal mucosal tissue versus swab samples.

Purpose of the Study:

  • To investigate significant differences in microbiota between sinonasal mucosal tissue and swab samples.
  • To determine if less invasive swab samples are representative of the sinonasal microbiome.
  • To validate swab samples for future CRS microbiome research.

Main Methods:

  • Cross-sectional study with paired design.
  • Intra-operative ethmoid sinus mucosal biopsy and swab samples from 6 CRS patients.
  • 16S-rRNA gene sequencing on Roche-454, analyzed with QIIME 1.8 software.

Main Results:

  • No significant difference in species richness (p > 0.05) between swab (30.6) and mucosa (36) samples.
  • Alpha diversity metrics (Faith's PD, Shannon's index) showed no significant difference (p > 0.05).
  • Beta diversity metrics (Unifrac, Bray-Curtis) were not significantly affected by sample type (p > 0.05).

Conclusions:

  • No significant difference was observed between the microbiota of mucosal tissue and swab samples.
  • Less invasive swab samples are representative of the sinonasal mucosa microbiome.
  • Swab samples can be utilized for future sinonasal microbiome studies.