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Relationship between the time of birth and the development of immediate hypersensitivity to grass-pollen antigens
Insights
Infants born during grass pollen season showed higher rates of pollen allergies. This suggests birth timing influences childhood hypersensitivity development, especially around three months of age.
Area of Science:
- Allergy and Immunology
- Pediatric Allergy
- Environmental Health
Background:
- Immediate hypersensitivity, or allergies, affects many children.
- Seasonal allergens like grass pollens are common triggers.
- The impact of birth timing on allergy development is not fully understood.
Purpose of the Study:
- To investigate the relationship between the season of birth and the development of immediate hypersensitivity in children.
- To determine if exposure to grass pollen around three months of age influences allergic sensitization.
Main Methods:
- Skin prick testing was performed on 86 children aged 3-14 years.
- Children were tested for immediate hypersensitivity to seasonal (grass pollens) and non-seasonal (car, dog, house-dust mite) antigens.
- Incidence of reactions was compared between children born during and outside the grass pollen season.
Main Results:
- Children who reached three months of age during grass pollen season had a significantly higher incidence of immediate hypersensitivity reactions to grass pollens.
- No significant difference in reactions was observed for non-seasonal antigens.
- A notable correlation was found between birth timing and the development of specific allergic sensitivities.
Conclusions:
- The findings suggest a significant relationship between the time of birth and the subsequent development of immediate hypersensitivity in childhood.
- Infants may be particularly susceptible to sensitization when exposed to environmental antigens around three months of age.
- Seasonal exposure timing plays a crucial role in the development of allergic responses.
Abstract:
Eighty-six children aged three to 14 years were skin-tested for immediate hypersensitivity to antigens which are seasonal (grass pollens) or non-seasonal (car, dog, house-dust mite) in occurrence. Children who reached the age of three months during a time of environmental exposure to grass pollen demonstrated a significantly increased incidence of immediate hypersensitivity reactions to three grass pollens, as compared with children born at other times of the year. No significant difference was found in their reactions to the non-seasonal antigens. These findings indicate a relationship between the time of birth and the subsequent development of immediate hypersensitivity in childhood. It is suggested that infants are particularly susceptible to sensitization when presented with antigen around three months of age.