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Food specific skin-test reactivity in atopic subjects
J E Morgan1, C B Daul, J Hughes
1Department of Medicine, Tulane University Medical Center, New Orleans, LA 70112.
Summary
Increased gut permeability is not a primary driver of food allergies. This study found no link between shrimp allergy and reactivity to other foods, suggesting allergies develop through different mechanisms.
Area of Science:
- Immunology
- Allergology
- Gastroenterology
Background:
- A proposed mechanism for food allergy development involves increased gut permeability.
- This suggests individuals with food allergies might show broader immune reactivity to other allergens.
Purpose of the Study:
- To investigate the relationship between a specific food allergy (shrimp) and immunological reactivity to other foods.
- To determine if increased gut permeability contributes to the development of food allergies.
Main Methods:
- Skin-prick testing was used to assess food-specific IgE responses in 60 individuals.
- Subjects were categorized by their history of shrimp allergy and atopic status.
Main Results:
- Skin-test reactivity to shrimp correlated with shrimp sensitivity history and atopy.
- Reactivity to other foods was linked to atopy, not shrimp allergy history.
- Multiple food sensitivities in shrimp-allergic individuals were associated with pulmonary symptoms.
Conclusions:
- The study's findings do not support the hypothesis that non-specific increases in gut permeability are crucial for food allergy development.
- Food allergy development may involve mechanisms other than generalized gut permeability issues.