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Lower airway microbiota in children with Down syndrome compared to controls.
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  • Mariska De Lausnay,
  • Stijn Verhulst,
  • Lieve Boel,
  • Kim Van Hoorenbeeck
Mariska De Lausnay
University Hospital Antwerp

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Stijn Verhulst
Universitair Ziekenhuis Antwerpen
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Lieve Boel
University Hospital Antwerp
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Kim Van Hoorenbeeck
University of Antwerp
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Introduction: Children with Down syndrome (DS) often present with chronic or recurrent respiratory symptoms. This can be caused by anatomical and/or immunological predisposition. With this study, we aim to evaluate the differences in microbiota in the lower airways of patients with DS versus controls. Methods: All endoscopic procedures under general anesthesia in patients with DS were reviewed retrospectively. We compared the microbiological data from BAL samples (when available) to a cohort of children with chronic respiratory symptoms but without any other relevant medical history. Results: Endoscopic data were available for 65 DS patients, microbiological data for 47 out of 65 patients (72%). The control group consisted of 150 children without significant underlying disease, who were matched for age and sex. Microbiological data were available for 135 out of 150 patients (90%). Microorganisms were categorized and compared in both groups, with no statistical differences. Mostly present were typical bacteria such as H. influenzae, Moraxella catarrhalis, Streptococci and Staphylococci. Conclusion: There were no significant differences in presence of pathogens in the lower airways of children with DS and chronic respiratory symptoms, compared to controls with similar symptomatology.