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Allergic contact urticaria from raw potato
E Gómez Torrijos1, P A Galindo, J Borja
1Allergy Section, Hospital Complex of Ciudad Real, Spain.
Journal of Investigational Allergology & Clinical Immunology
|October 20, 2001
Summary
A 19-year-old experienced immediate allergic reactions, including hives and swelling, after touching raw potato. Allergy tests confirmed a specific IgE immune response to potato.
Area of Science:
- Allergology
- Immunology
- Dermatology
Background:
- Food allergies are a growing public health concern.
- Immediate hypersensitivity reactions can manifest with diverse symptoms.
- Cutaneous reactions like urticaria and angioedema are common presentations of allergies.
Observation:
- A 19-year-old male presented with acute onset urticaria and angioedema.
- Symptoms occurred immediately following direct skin contact with raw potato.
- Physical examination revealed characteristic skin lesions consistent with allergic reaction.
Findings:
- Prick-by-prick testing using potato pulp yielded a positive result.
- A direct skin rub test with potato also indicated sensitization.
- Specific immunoglobulin E (IgE) testing for potato was positive, classified as class 2.
Implications:
- This case highlights raw potato as a potential allergen causing immediate hypersensitivity.
- Diagnostic methods like prick-by-prick and IgE testing are crucial for identifying potato allergy.
- Awareness of potato allergy is important for individuals with unexplained allergic reactions.