Efficacy of Local Food Extracts at Different Storage Times
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Local lyophylized food extracts are available useful in skin prick test and atopy patch test to confirm food allergy. However, the investigators want to know the duration that the investigators can keep the extracts for the usage in this purpose.
Condition or disease
Other: prick and patch test
Food allergy incidence increases world wide. The diagnosis mostly depends on history. Skin prick test and atopic patch test are useful in finding the causative foods in some cases. The local food extracts have been shown to be at least as effective as commercial ones. From previous study the investigators keep the extract at 2-8 degree Celsius for 1-3 months for the usage. The investigators want to evaluate the duration that the extracts are still useful in diagnosis food allergy
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Layout table for eligibility information
Ages Eligible for Study:
3 Years to 18 Years (Child, Adult)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Food allergy cases aged 3-18 years old.
Positive skin prick test to one of the food (milk, egg, soy, wheat, seafood)
Chronic diseases such as heart disease, liver, renal and severe sepsis