The diagnosis of food allergy depends primarily on a detailed history as outlined in the algorithm, looking for supporting features such as reactions to common cause foods, clinical signs, symptoms and timing.
There is no symptom or sign that is absolutely specific to allergic disease.
The most important history feature is the timing of onset of symptoms after contact with the food; IgE mediated reactions usually occur within minutes and by definition within 2 hours of contact.
Very small amounts of food can elicit significant IgE mediated reactions.
Delayed or non IgE mediated food allergy is a well recognised entity although there is currently no validated test to confirm it.
A small proportion of children with significant colic, gastro-oesophageal reflux or constipation in infancy have delayed food allergy.
Privacy & Cookies Policy
Necessary cookies are absolutely essential for the website to function properly. This category only includes cookies that ensures basic functionalities and security features of the website. These cookies do not store any personal information.
Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. It is mandatory to procure user consent prior to running these cookies on your website.