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Published on: December 6, 2016
The Adenoid Microbiome in Recurrent Acute Otitis Media and Obstructive Sleep Apnea
Carolyn O Dirain1, Rodrigo C Silva1, William O Collins1
1Department of Otolaryngology, University of Florida, Gainesville, USA.
Objective:
To compare the microbial flora of adenoids from patients with recurrent acute otitis media (AOM) and patients with obstructive sleep apnea (OSA).
Materials And Methods:
This study was prospective and controlled. Adenoids were obtained from children undergoing adenoidectomy for recurrent AOM (n=7) or OSA (n=13). Specimens were processed for total deoxyribonucleic acid (DNA) isolation. 16s DNA 454-pyrosequencing was performed on AOM (n=5) and OSA (n=5) specimens. All specimens were analyzed by real-time polymerase chain reaction for the quantification of the oral commensal bacteria, Streptococcus salivarius.
Results:
All adenoid specimens had evidence of microbes. Haemophilus influenzae, Moraxella catarrhalis, Streptococcus pneumoniae, Pseudomonas aeruginosa, and Staphylococcus aureus were among the dominant species in all samples. S. salivarius, Prevotella sp. and Terrahaemophilus aromaticivorans were more common on adenoids from OSA patients (p<0.05). Bradyrhizobium sp. was more common on adenoids from patients with recurrent AOM (p<0.05). The microbial profiles associated with recurrent AOM were different from, but overlapped with OSA. S. salivarius quantified by real-time PCR was not different between the two groups.
Conclusion:
Microbes are present on all adenoid specimens, though the microbial profile differs between recurrent AOM and OSA. The clinical significance of these differences remains to be determined.
Insights
Microbial differences exist on adenoids from children with recurrent acute otitis media (AOM) and obstructive sleep apnea (OSA). These distinct bacterial profiles may influence disease development, but their clinical significance requires further investigation.
Area of Science:
- Microbiology
- Otolaryngology
- Genetics
Background:
- Adenoids play a role in respiratory and immune health.
- Recurrent acute otitis media (AOM) and obstructive sleep apnea (OSA) are common pediatric conditions often treated with adenoidectomy.
- The microbial composition of adenoids in these conditions is not fully understood.
Purpose of the Study:
- To compare the adenoid microbiome in children with recurrent AOM versus OSA.
- To identify specific bacterial species associated with each condition.
Main Methods:
- Prospective, controlled study involving adenoid tissue from children undergoing adenoidectomy.
- DNA isolation and 16S DNA 454-pyrosequencing for microbial profiling.
- Real-time PCR to quantify Streptococcus salivarius.
Main Results:
- All adenoid samples harbored microbes, with common species including H. influenzae, M. catarrhalis, S. pneumoniae, P. aeruginosa, and S. aureus.
- Specific bacteria like S. salivarius, Prevotella sp., and T. aromaticivorans were more prevalent in OSA patients.
- Bradyrhizobium sp. was more common in recurrent AOM patients.
- Microbial profiles differed between AOM and OSA groups, with some overlap.
Conclusions:
- Adenoids host diverse microbial communities.
- Distinct microbial profiles are associated with recurrent AOM and OSA in children.
- The clinical implications of these adenoid microbiome differences warrant further research.
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