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Season of Birth Impacts the Neonatal Nasopharyngeal Microbiota

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  1. Cost of Illness in Young Children: A Prospective Birth Cohort Study

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  2. Relapse of Neonatal Escherichia coli Meningitis: Did We Miss Something at First?

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  3. Environmental and Genetic Determinants of Serum 25(OH)-Vitamin D Levels during Pregnancy and Early Childhood

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  1. Breast milk n-3 long-chain polyunsaturated fatty acids and blood pressure: an individual participant meta-analysis

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  2. Cost of Illness in Young Children: A Prospective Birth Cohort Study

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  3. Asthma-like Symptoms in Young Children Increase the Risk of COPD

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  4. Maternal Metabolome in Pregnancy and Childhood Asthma or Recurrent Wheeze in the Vitamin D Antenatal Asthma Reduction Trial

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Objective: Pathogenic airway bacteria colonizing the neonatal airway increase the risk of childhood asthma, but little is known about the determinants of the establishment and dynamics of the airway microbiota in early life. We studied associations between perinatal risk factors and bacterial richness of the commensal milieu in the neonatal respiratory tract. Methods: Three hundred and twenty-eight children from the Copenhagen Prospective Studies on Asthma in the Childhood2000 (COPSAC2000) at-risk birth cohort were included in this study. The bacterial richness in each of the nasopharynxes of the 1-month old, asymptomatic neonates was analyzed by use of a culture-independent technique (T-RFLP). Information on perinatal risk factors included predisposition to asthma, allergy and eczema; social status of family; maternal exposures during pregnancy; mode of delivery; and postnatal exposures. The risk factor analysis was done by conventional statistics and partial least square discriminant analysis (PLSDA). Results: The nasopharyngeal bacterial community at 1-month displayed an average of 35 (IQR: 14-55, range 1-161) phylogenetically different bacteria groups. Season of birth was associated with nasopharyngeal bacterial richness at 1-month of age with a higher bacterial richness (p = 0.003) and more abundant specific bacterial profiles representing Gram-negative alpha-proteobacteria and Gram-positive Bacilli in the nasopharynx of summer-born children. Conclusion: Early postnatal bacterial colonization of the upper airways is significantly affected by birth season, emphasizing a future focus on the seasonality aspect in modelling the impact of early dynamic changes in airway bacterial communities in relation to later disease development.

Original languageEnglish
JournalChildren (Basel, Switzerland)
Volume7
Issue number5
Number of pages15
ISSN2227-9067
DOIs
Publication statusPublished - 11 May 2020

ID: 61276945