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Updated: Apr 10, 2026

Oral Biofilm Sampling for Microbiome Analysis in Healthy Children
Published on: December 31, 2017
Profiling of Oral and Nasal Microbiome in Children With Cleft Palate
Insights
Children with cleft palate have altered oral and nasal microbiomes, with reduced diversity and different bacterial compositions. This oral microbiome disturbance may link to increased infectious disease risk.
Area of Science:
- Microbiology
- Genetics
- Pediatrics
Background:
- Cleft palate is associated with a higher prevalence of infectious diseases.
- The oral and nasal microbial profiles in children with cleft palate are not well understood.
Purpose of the Study:
- To identify the oral and nasal microbial profiles in children with cleft palate.
- To compare these profiles with those of healthy children.
- To explore potential links between the microbiome and infectious diseases.
Main Methods:
- Analysis of saliva and nasal samples from 10 cleft palate children and 10 age-matched controls.
- DNA isolation, PCR-DGGE for microbial fingerprinting, and DNA sequencing.
Main Results:
- Significantly lower saliva microbial diversity in cleft palate children.
- Distinct microbial compositions in saliva and nares of cleft palate children.
- Increased oral-nasal microbial similarity in cleft palate children.
- Reduced presence of Lautropia and Bacillus species in cleft palate children's saliva.
- Fewer Dolosigranulum and Bacillus species in cleft palate children's nasal cavities.
- Predominance of Streptococcus species in the nasal cavities of cleft palate children.
Conclusions:
- Children with cleft palate exhibit a disturbed oral and nasal microbiome.
- Abnormal communication between oral and nasal cavities may contribute to microbiome alterations.
- Further research is needed to establish the relationship between the disturbed microbiome and disease.
Objective:
To identify the oral and nasal microbial profile of cleft palate children and control children and to reveal interrelationships between the microbiome and the high prevalence of infectious diseases.
Design:
Saliva and nasal samples of 10 cleft palate children and 10 age-matched control children were analyzed. Total microbial genomic DNA was isolated, polymerase chain reaction-denaturing gradient gel electrophoresis was applied to obtain fingerprints, and selected bands on fingerprints were sequenced.
Results:
The results revealed a significantly lower saliva microbial diversity in cleft children and a different microbial component in both saliva and nares in children with cleft palate. A higher component similarity between the oral and nasal samples was found in the cleft group than in the control group. Lautropia species and Bacillus species were significantly less present among the saliva samples of cleft group. Dolosigranulum species and Bacillus species were significantly fewer in the nasal cavity of cleft group. Streptococcus species became much more predominant in the nasal cavity of the cleft group than in that of the control group.
Conclusions:
A disturbed ecological ecosystem is found in oral and nasal microbiome of children with cleft palate as a consequence of the abnormal communication between the two cavities. Further studies are needed to explore the relationship between the disturbed microbiome and diseases.
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