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Peach allergy in spanish children: tolerance to the pulp and molecular sensitization profile

Authors


Correspondence

Teresa Boyano-Martínez, Department of Allergy, Hospital La Paz Health Research Institute (IdiPaz), C/ Ginzo de Limia 55, 9º C, 28034 Madrid, Spain.

Tel.: +34 917304920

Fax: +34 917277033

E-mail: med012396@saludalia.com

Abstract

Background

Peach allergy is the main cause of vegetable food allergy in the Mediterranean area. Pru p 3 is the major allergen, and it is mainly found in the peel.

Objective

We sought to calculate the frequency of tolerance to peach pulp in Spanish children suffering from allergic reactions after eating or having contact with peach and to analyze the sensitization pattern to peach allergens.

Methods

Fifty-seven children (32 boys; median age, 7.4 yr) were included in the study. A systematized questionnaire on allergic reactions to peach was administered. Prick tests with peach peel and pulp, peach lipid transfer protein (LTP), and profilin were performed. Serum-specific IgE to peach, rPru p 1, rPru p 3, and rPru p 4 was determined by ImmunoCAP. Oral food challenges (OFCs) with peach pulp were performed on all but one child.

Results

Eighty-eight percent of the children had positive prick tests with peach peel, 35% with peach pulp, 88% with peach LTP, and 9% with profilin. Serum-specific IgE to peach was demonstrated in 100% of the patients; rPru p 3-specific IgE in 96%; rPru p 1-specific IgE in 11%; and rPru p 4-specific IgE in 10%. Oral food challenge was negative in 52 (93%) children.

Conclusions

More than 90% of the study population tolerated peeled peach. Pru p 3 was the major allergen. Pru p 1 and 4 showed low prevalence.

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