Abstract:
BACKGROUND:IgE-independent (pseudoallergic) reactions to food and food ingredients are common in a subgroup of adult patients with chronic urticaria, who have daily spontaneous occurrence of wheals. However, for children with chronic urticaria (duration longer than 6 weeks, no physical influence), no data on the importance of pseudoallergen-induced chronic urticaria are available. Therefore, we investigated the role of nonallergic hypersensitivity to food in all children seen with chronic continuous urticaria in our two clinics over the last 2 years (n = 16). METHODS:All patients were given a low-pseudoallergen diet for 3 weeks followed by provocation with food rich in pseudoallergens. To identify the main eliciting agents, a subgroup of responders was exposed to food additives by double-blind, placebo-controlled food challenges. RESULTS:Pseudoallergen-induced urticaria was diagnosed in 12 cases (75%). Reactions occurred mainly to coloring agents and preservatives, but also to monosodium glutamate and a sweetener (saccharin/cyclamate). CONCLUSIONS:These results confirm that nonallergic hypersensitivity reactions play a role in children with chronic urticaria, although the latter disease is rare at that age. In children, food additives, especially coloring agents and preservatives, appear to play a more important role in eliciting nonallergic hypersensitivity reactions than in adult patients, where naturally occurring pseudoallergens in fruits and vegetables are mainly responsible.
journal_name
Allergyjournal_title
Allergyauthors
Ehlers I,Niggemann B,Binder C,Zuberbier Tdoi
10.1111/j.1398-9995.1998.tb03817.xsubject
Has Abstractpub_date
1998-11-01 00:00:00pages
1074-7issue
11eissn
0105-4538issn
1398-9995journal_volume
53pub_type
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