Abstract
Childhood eczema is common but its prevalence is variable in different regions of the world. In this study, we explore the associations of various risk factors such as the microbiome, environment, lifestyle, diet and maternal stress with the development of eczema among infants in Hong Kong. Upon enrolment in the study, the infants' parents provided demographic data by self‐reporting. At enrolment and 1 year after birth, the infants' allergic conditions, lifestyles and dietary factors and the degree of maternal stress were assessed using various questionnaires. The infants' gut microbiomes were analysed by 16S RNA sequencing, and the longitudinal changes in various bacterial strains were compared between control and eczema‐affected groups. Multivariate analyses (after adjustment for other significant factors) revealed that the changes in the abundance of Hungatella hathewayi in the gut were significantly associated with the development of eczema (p = 0.005). In conclusion, the increased abundance of Hungatella hathewayi was associated with an increased risk of developing eczema by 1 year of age. This study thus explored the potential risk factors for the development of eczema in Hong Kong infants, and sheds light on the possible association between early‐life gut microbiome and other environmental factors.
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