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Oral Biofilm Sampling for Microbiome Analysis in Healthy Children
Published on: December 31, 2017
Composition and Comparison of the Ocular Surface Microbiome in Infants and Older Children
Kara M Cavuoto1, Santanu Banerjee2, Darlene Miller1
1Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA.
Insights
The ocular surface microbiome (OSM) in children is mainly composed of Staphylococcus species. Older children exhibit a more diverse OSM compared to infants, as revealed by 16S sequencing.
Area of Science:
- Microbiology
- Pediatrics
- Ophthalmology
Background:
- The ocular surface microbiome (OSM) composition in children remains underexplored.
- Understanding the pediatric OSM is crucial for identifying potential health implications.
Purpose of the Study:
- To investigate the OSM composition in infants and compare it with older children.
- To assess age-related differences in the pediatric OSM using culture-dependent and independent methods.
Main Methods:
- Prospective, observational, cross-sectional study of children under 18 years.
- Swabs from ocular, nasal, and throat mucosal surfaces were collected.
- Analysis involved both traditional culture plating and 16S rRNA gene sequencing.
Main Results:
- Fifty patients (mean age 37 months) were enrolled.
- Staphylococcus species predominated in the OSM by both culture and sequencing.
- Older children showed greater microbiome diversity than infants under 6 months (P=0.05).
- The OSM closely resembled the nasal microbiome but differed significantly from the throat microbiome.
Conclusions:
- The pediatric OSM is primarily composed of Staphylococcus species.
- Age influences OSM complexity, with older children having more diverse microbiomes.
- 16S sequencing offers a more comprehensive view of the OSM than traditional culture methods.
Purpose:
Unlike other microbiomes of the body, the composition of the ocular surface microbiome (OSM) in children has yet to be thoroughly explored. Our goal was to evaluate the OSM in young infants and compare its composition to older children using both culture dependent and independent methodologies to assess for differences with age.
Methods:
Prospective, observational, cross-sectional study of children <18 years of age at a university-based institution. The mucosal surfaces of both eyes, nose and throat were swabbed with a forensic-quality swab. Half of the swab was plated for culture and the other half underwent 16S sequencing. Culture results and microbiome diversity were analyzed.
Results:
Fifty patients (mean age 37 months, range 1-168 months) were enrolled. Forty-seven eyes of 30 patients had positive cultures; four eyes grew >1 species. Culture positive patients were older (43 vs. 29 months, P = 0.19). Additionally, older children had greater diversity than children under 6 months of age by 16S sequencing (P = 0.05). Staphylococcus species were predominant by culture (35/52 isolates) and by 16S sequencing. The OSM was fairly similar to the nose microbiome, whereas the throat microbiome differed significantly and had a higher abundance of Streptococcaceae (P = 0.001).
Conclusions:
The OSM is predominantly composed of Staphylococcus species in children, as demonstrated by both culture dependent and culture independent methods. Older children were more likely to have growth on culture and have more a complex bacterial milieu with 16S sequencing.
Translational Relevance:
16S sequencing provides more robust information regarding the composition of the microbiomes than culture dependent methods.
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