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Early skin sensitization to aeroallergens
G de Bilderling1, M Mathot, S Agustsson
1Service de Pédiatrie et de Pneumologie de l'enfant, Cliniques UCL de Mont-Godinne, Avenue Therasse, Yvoir, Belgium. georges.debilderling@pedi.ucl.ac.be
Insights
Early aeroallergen sensitization was found in 28% of young children, linked to house dust mite exposure and soft toy contact. This highlights the importance of early detection for allergic disease prognosis.
Area of Science:
- Pediatric Allergy and Immunology
- Environmental Health
- Clinical Immunology
Background:
- Early detection of aeroallergen sensitization is crucial for predicting allergic disease outcomes.
- Diagnosing sensitization can be challenging in very young children.
- Understanding early risk factors is key for intervention.
Purpose of the Study:
- To determine the prevalence of skin sensitization to aeroallergens in children aged 0-2 years.
- To investigate associations between aeroallergen sensitization and environmental exposures, including family history of allergies.
- To evaluate the utility of skin prick testing in this age group.
Main Methods:
- Retrospective analysis of 824 children (0-2 years) attending an asthma clinic.
- Skin testing performed for a panel of aero- and food allergens.
- Data collection on environmental exposures and family/personal allergic history.
Main Results:
- Atopy was present in 40% of children; 28% were sensitized to aeroallergens, primarily house dust mite.
- Higher sensitization rates correlated with larger weal responses to histamine and sleeping with soft toys (OR 1.45).
- A personal history of eczema showed a negative association with sensitization (OR 0.66).
Conclusions:
- This study reveals a high prevalence of aeroallergen sensitization in young children.
- Exposure to soft toys emerged as a significant associated factor.
- Further longitudinal studies are needed to assess the predictive value of early sensitization.
Background:
Early detection of aeroallergen sensitization is important as a prognosis factor but may be more difficult in young children.
Objective:
We sought to demonstrate that skin sensitization to aeroallergens was present in a selected group of 0-2-year-old children and that it was associated with environmental exposure and a family history of allergic disease.
Methods:
Data on exposure and history were extracted from the files of 824 children seen in the asthma clinic and who were skin tested to a panel of aero- and food allergens.
Results:
Forty percent of our children demonstrated atopy, 28% were sensitized to aeroallergens, the majority of which to house dust mite. Higher sensitization rates were found in children with large weals to histamine (P<0.001) and in those who slept with soft toys [odds ratio (OR) 1.45, 95% confidence interval (CI) 1.02-2.08]. With a definition of sensitization including the size of the weal to histamine, there was a negative association with a personal history of eczema only (OR 0.66, 95% CI 0.45-0.99). There was no gender-dependent effect and no association with day-care attendance.
Conclusion:
This is one of the largest studies to evaluate skin testing in a selected population of young children. We found a high prevalence of sensitization to aeroallergens, which was associated with exposure to soft toys. Further follow-up of this population will allow assessment of the predictive value of this sensitization.
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