Efficacy of Lyophilized Food Extracts for Skin Prick Tests and Atopy Patch Test at Different Storage Time

Comparison of Skin Prick Tests and Atopy Patch Test Results of Lyophilized Food Extracts at Different Storage Time (0, 3 and 6 Months) After Preparation

Comparison the result of skin prick tests and atopy patch test of lyophilized food extracts at different storage time (0, 3 and 6 months) after preparation

Skin prick test were performed with lyophilized food extracts (cow milk, egg white, egg yolk, wheat, soy and shrimp) at different storage time (0, 3 and 6 months) after preparation.

Atopy patch test were performed with lyophilized food extracts (cow milk, egg white, egg yolk, wheat, soy and shrimp) at different storage time (0, 3 and 6 months) after preparation

Inclusion Criteria:

• mild to moderately severe food allergy patients
• At least positive skin test to one kind of common food (commercial extract)
• Stop antihistamine or corticosteroid (if more than 20mg/day) for at least 7 days

Exclusion Criteria:

• Dermographism
• Severe systemic disease such as autoimmune disease, immune deficiency, malignancy
• Severe dermatitis or large area involment
• pregnancy