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Published on: July 23, 2012
Development of allergy in children. I. Association with virus infections
Insights
Children with allergic parents face high allergy risks. Viral infections, like upper respiratory infections (URI), may trigger allergic sensitization in these children, suggesting a link between viruses and allergy development.
Area of Science:
- Pediatrics
- Immunology
- Environmental Health
Background:
- Children with two allergic parents have a high risk of developing allergies within the first five years of life.
- External factors influencing the allergic sensitization process require further investigation.
Purpose of the Study:
- To prospectively observe clinical and immunological changes in high-risk children.
- To identify potential external factors contributing to allergic sensitization.
Main Methods:
- A prospective study of 13 children from allergic families.
- Serial clinical and immunological observations at 3-6 month intervals over 1-4 years.
- Immunological assessments included RAST, leukocyte histamine release, lymphoblastogenesis, and serum IgE levels.
Main Results:
- Eleven of the 13 children developed clinical allergies, with 5 diagnosed with asthma.
- Immunological evidence of allergic sensitization was found in these 11 children.
- Upper respiratory infections (URI) preceded allergic sensitization by 1-2 months in 10 children.
- Increased complement-fixing antibodies to viruses (parainfluenza, RSV, CMV) coincided with the onset of allergic sensitization.
Conclusions:
- Certain viruses may play a role in the allergic sensitization process in genetically predisposed children.
- The timing of URI and viral antibody increases suggests a potential viral contribution to allergy development.
Abstract:
Children born into allergic families, with two allergic parents, are at high risk of developing allergy within the first 5 years of life. In order to observe possible external factors in the sensitization process, a prospective study of 13 such children was done, in which serial clinical and immunologic observations were made at 3- to 6-month intervals over a period of 1 to 4 yr. Eleven of these children are now clinically allergic; 5 have asthma. Immunologic evidence for allergic sensitization was observed in these 11 children by RAST, antigen-induced leukocyte histamine release, lymphoblastogenesis, and rise in serum IgE. Upper respiratory infections (URI) occurred in these 11 allergic children 1 to 2 months prior to the onset of allergic sensitization. In 10 of these 11 URI children, complement-fixing antibodies to viruses (parainfluenza, RSV, CMV) increased in the same blood samples in which immunologic allergic sensitization was first evidenced. This coincidence suggests that certain viruses may contribute to the allergic sensitization process.
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