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Methodologic Considerations for Studying the Ocular Surface Microbiome.

Apoorva Chowdhary1, Russell N Van Gelder1,2,3,4, Miel Sundararajan1

  • 1Department of Ophthalmology, University of Washington, Seattle, Washington.

Ophthalmology Science
|November 29, 2023
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Summary
This summary is machine-generated.

The ocular surface microbiome is more complex than previously thought, but studying it requires standardized methods to avoid contamination and ensure accurate results for understanding eye health.

Keywords:
Metagenomic sequencingOcular surface microbiomeShotgun sequencing

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Area of Science:

  • Microbiology
  • Ophthalmology
  • Genomics

Background:

  • The ocular surface microbiome's composition remains poorly understood compared to other body sites.
  • Historically, culture-based methods suggested a sterile ocular surface, contradicting newer molecular findings.
  • Low-biomass environments like the eye are prone to contamination and artifacts in molecular analyses.

Purpose of the Study:

  • To highlight the challenges in characterizing the ocular surface microbiome.
  • To emphasize the need for standardized protocols in ocular microbiome research.
  • To discuss advancements aiding in the accurate study of the ocular surface microbiome.

Main Methods:

  • Review of existing literature on ocular surface microbiome studies.
  • Discussion of molecular techniques like 16S ribosomal RNA and shotgun sequencing.
  • Exploration of new technologies for validation and visualization.

Main Results:

  • Molecular methods reveal a rich ocular surface microbiome, challenging previous assumptions.
  • Amplification-based techniques pose risks of artifactual data in low-biomass samples.
  • Standardization of sample collection, controls, and computational analysis is crucial.

Conclusions:

  • Accurate characterization of the ocular surface microbiome is essential for understanding its role in eye diseases.
  • Developing standardized methods and new technologies will improve the reliability of ocular microbiome research.
  • Further research can elucidate the link between microbial dysbiosis and ophthalmic conditions.