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Anaphylaxis to raw potato.
J L Beausoleil1, J M Spergel, N A Pawlowski
1Division of Immunologic and Infectious Diseases, The Children's Hospital of Philadelphia, PA 19104, USA.
Summary
A 4-year-old experienced severe anaphylaxis from raw potato, distinct from Oral Allergy Syndrome (OAS). Skin tests confirmed reactivity to fresh, but not commercial, potato extract, highlighting a unique presentation of potato allergy.
Area of Science:
- Food allergy research
- Pediatric immunology
- Clinical diagnostics
Background:
- Potato allergy is rarely documented, often linked to Oral Allergy Syndrome (OAS).
- OAS in adults with allergic rhinitis can manifest as oculonasal symptoms or urticaria from raw potato contact.
- Commercial potato extract sensitivity may not fully represent fresh potato allergenicity.
Observation:
- A 4-year-old presented with immediate anaphylaxis after ingesting raw potato.
- Symptoms included urticaria, angioedema, respiratory distress, vomiting, and diarrhea.
- The child had no prior symptoms of seasonal allergic rhinitis, unlike his mother who has OAS and raw potato contact urticaria.
Findings:
- Skin testing showed a positive reaction to fresh potato (prick + prick) but a negative reaction to commercial potato extract.
- The patient exhibited clinical reactivity to raw potato without OAS.
- A cooked potato challenge was negative, indicating specificity to raw potato.
Implications:
- This case suggests raw potato can cause anaphylaxis independent of OAS.
- Diagnostic approaches for potato allergy may need to include fresh potato testing.
- Further monitoring is warranted for potential development of seasonal allergic rhinitis.