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Updated: Mar 20, 2026

Oral Biofilm Sampling for Microbiome Analysis in Healthy Children
Published on: December 31, 2017
Exploring the microbial landscape of the nasopharynx in children: a systematic review of studies using next
Petra Zimmermann1,2,3,4
1Department of Community Health, Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.
Insights
The nasopharyngeal microbiome in children is dynamic and linked to health outcomes. Specific microbial patterns, influenced by factors like birth mode and feeding, can indicate risks for respiratory infections and asthma.
Area of Science:
- Microbiology
- Pediatrics
- Immunology
Background:
- The nasopharynx hosts a dynamic microbial community crucial for respiratory health and immune development.
- Understanding the pediatric nasopharyngeal microbiome is vital due to children's susceptibility to respiratory infections.
Purpose of the Study:
- To systematically review studies on the pediatric nasopharyngeal microbiome.
- To analyze microbiome dynamics, stability, and influencing factors in children.
- To explore associations between the nasopharyngeal microbiome and adverse health outcomes.
Main Methods:
- Systematic review of studies.
- MEDLINE database search via OVID interface.
- Inclusion of original studies using next-generation sequencing in children.
Main Results:
- 77 studies were included from 736 identified.
- The pediatric nasopharyngeal microbiome is dynamic and influenced by external factors.
- Specific microbial profiles (e.g., high *Haemophilus*, *Moraxella*, *Streptococcus*; low *Corynebacterium*, *Dolosigranlum*) correlate with adverse outcomes like respiratory infections and asthma.
Conclusions:
- Nasopharyngeal microbial profiles are associated with adverse health outcomes in children.
- The microbiome can serve as a biomarker for disease risk identification.
- Targeted interventions based on microbiome analysis offer preventive strategies.
Introduction:
The nasopharynx harbours a diverse and dynamic microbial community, which plays an important role in maintaining the health and homeostasis of the respiratory tract, as well as in immune system development. Understanding factors that influence the composition of the nasopharyngeal microbiome in children and its association with diseases is of particular importance, as children are at a heightened risk for respiratory infections and other adverse health outcomes.
Objectives:
This review systematically summarises studies which investigated the nasopharyngeal microbiome in children, including its dynamics, stability over time, and the influence of intrinsic and extrinsic factors on its composition.
Methods:
MEDLINE was searched using the OVID interface. Original studies which investigated the nasopharyngeal microbiome using next generation sequencing in children were summarised.
Results:
The search identified 736 studies, of which 77 were included. The studies show that the nasopharyngeal microbiome in children is dynamic and influenced by many external factors. A high abundance of Haemophilus, Moraxella, and Streptococcus and a low abundance of Corynebacterium and Dolosigranlum are associated with adverse health outcomes such as respiratory tract infections, wheezing and asthma exacerbations. Factors which have been identified as risk factors for these adverse health outcomes, such as being born by Caesarean section, not being breast-fed, having siblings, day-care attendance, and antibiotic exposure have been shown to be associated with the aforementioned features in the nasopharyngeal microbiome.
Conclusion:
The association between specific nasopharyngeal microbial profiles and adverse health outcomes highlights the potential of the nasopharyngeal microbiome as a marker for identifying children at risk for disease and even more importantly, as an avenue for targeted interventions and preventive strategies.
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