Season of Birth Impacts the Neonatal Nasopharyngeal Microbiota
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Season of Birth Impacts the Neonatal Nasopharyngeal Microbiota. / Schoos, Ann-Marie Malby; Kragh, Marie; Ahrens, Peter; Kuhn, Katrin Gaardbo; Rasmussen, Morten Arendt; Chawes, Bo Lund; Jensen, Jørgen Skov; Brix, Susanne; Bisgaard, Hans; Stokholm, Jakob.
I: Children, Bind 7, Nr. 5, 45, 2020.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Season of Birth Impacts the Neonatal Nasopharyngeal Microbiota
AU - Schoos, Ann-Marie Malby
AU - Kragh, Marie
AU - Ahrens, Peter
AU - Kuhn, Katrin Gaardbo
AU - Rasmussen, Morten Arendt
AU - Chawes, Bo Lund
AU - Jensen, Jørgen Skov
AU - Brix, Susanne
AU - Bisgaard, Hans
AU - Stokholm, Jakob
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
U2 - 10.3390/children7050045
DO - 10.3390/children7050045
M3 - Journal article
C2 - 32403236
VL - 7
JO - Children
JF - Children
SN - 2227-9067
IS - 5
M1 - 45
ER -
ID: 256216486