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Contact urticaria to raw potato.

Z Martínez de Lagrán, F J Ortiz de Frutos, M González de Arribas

Dermatology Online Journal

|July 24, 2009

Summary

Adverse reactions to raw potatoes, though uncommon, can cause allergic contact urticaria in adults. This case highlights skin reactions from touching raw potatoes, confirmed by prick testing.

Area of Science:

Allergen immunology
Dermatology
Food allergy

Background:

Potatoes are a global dietary staple, yet adverse reactions are typically linked to ingestion, primarily in children.
Immediate hypersensitivity reactions to raw potato contact are less common but documented in adults.

Observation:

This report details a case of non-occupational allergic contact urticaria triggered by direct contact with raw potato.
The patient presented with symptoms indicative of an allergic reaction upon skin exposure to uncooked potato.

Findings:

The allergic contact urticaria was confirmed through diagnostic prick testing, establishing a clear link between raw potato and the patient's reaction.
Prick testing successfully identified raw potato as the allergen responsible for the observed urticarial response.

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Implications:

This case underscores the potential for raw potato to act as a contact allergen, leading to urticaria and other immediate hypersensitivity reactions in susceptible adults.
Healthcare providers should consider raw potato allergy in the differential diagnosis of unexplained contact urticaria, especially in non-occupational settings.
Further investigation into the prevalence and mechanisms of raw potato allergy is warranted.