Editor,—True and perceived nut allergy is a problem that paediatricians are seeing ever more frequently and guidelines for adequate diagnosis are needed. We therefore published our experience of children presenting to a general paediatric clinic with this problem.1 In their letter O'B Hourihaneet al have some points regarding the methodology we used for the diagnosis of nut allergy2; we would like to comment on some of those issues.

The assumption that nut was the “only possible allergen” in …