A Case of Peanut Cross-Allergy to Lupine Flour in a Hot Dog BreadFæste C.K.a · Løvik M.b · Wiker H.G.b · Egaas E.a
aNational Veterinary Institute, bNorwegian Institute of Public Health, Oslo, Norway
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Background: In a case monitored by the Norwegian National Register for Severe Allergic Reactions to Food, a patient with peanut allergy experienced an allergic reaction after eating a particular brand of hot dog bread. The aim of this study was to identify the eliciting allergen. Methods: Extracts from the hot dog bread and reference material from peanut, lupine and lupine-fortified food products were analysed by immunochemical methods with patient serum and a new polyclonal anti-lupine antibody. Results: Evidence could be provided that the hot dog bread contained proteins from lupine but not from peanut. Conclusion: Crossed peanut-lupine allergy can have clinical significance. A peanut-allergic patient reacted against hidden lupine protein in a hot dog bread. Presented with our results, the producer confirmed the use of lupine flour and changed the ingredient list.
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