Component-resolved diagnostics in pediatric wheat-dependent exercise-induced anaphylaxis: A case report.

Area of Science:

• Allergy and Immunology
• Pediatric Allergy
• Food Hypersensitivity

Background:

• Wheat-dependent exercise-induced anaphylaxis (WDEIA) is an IgE-mediated allergic reaction triggered by wheat consumption followed by physical activity.
• Diagnosis typically relies on omega-5 gliadin-specific IgE (sIgE) testing, but its sensitivity is lower in pediatric populations.
• Accurate diagnosis is crucial for managing WDEIA and preventing severe allergic reactions.

Observation:

• A 13-year-old male presented with anaphylaxis after ingesting wheat and exercising.
• Initial ImmunoCAP testing showed positive wheat and gluten sIgE but negative omega-5 gliadin sIgE.
• An oral food challenge with exercise confirmed WDEIA.

Findings:

• Alpha/beta gliadin-specific IgE was detected via ELISA in the patient's serum, suggesting its utility.
• This indicates that omega-5 gliadin sIgE alone may be insufficient for diagnosing WDEIA in children.
• Alpha/beta gliadin sIgE can potentially serve as an alternative diagnostic marker in pediatric WDEIA cases.

Implications:

• Current diagnostic strategies for WDEIA in children may need revision.
• Testing for alpha/beta gliadin sIgE could improve diagnostic sensitivity and specificity in pediatric WDEIA.
• A combination of wheat protein component testing may offer a more comprehensive approach to diagnosing WDEIA in children.