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Contact urticaria from rice
Author(s) -
Yamakawa Yuko,
Ohsuna Hiroyuki,
Aihara Michiko,
Tsubaki Kazufumi,
Ikezawa Zenro
Publication year - 2001
Publication title -
contact dermatitis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.524
H-Index - 96
eISSN - 1600-0536
pISSN - 0105-1873
DOI - 10.1034/j.1600-0536.2001.440207.x
Subject(s) - allergen , contact dermatitis , medicine , allergy , histamine , erythema , patch test , itching , dermatology , allergic contact dermatitis , food science , chemistry , immunology
A 30‐year‐old man with atopic dermatitis had had erythema and itching of the hands after washing rice in water, though he had always eaten cooked rice without problems. Handling test with water used to wash regular rice was performed on abraded hands, and produced urticarial erythema after several minutes. Applications of water used to wash allergen‐reduced rice were negative for urticarial reaction. Prick test with water used to wash regular rice was +++. However prick test reaction with water used to wash allergen‐reduced rice was +. Histamine‐release test of regular rice‐washing water was grade 3 and that of allergen‐reduced rice grade 1. In immunoblotting analysis with regular rice washing water, there were no bands with this patient. These results suggest that the allergen responsible for contact urticaria in this patient might be water‐soluble, heat‐unstable, and not contained in allergen‐reduced rice.