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BioMed Research International
Volume 2013 (2013), Article ID 170452, 5 pages
Research Article

Peanut Sensitization Profiles in Italian Children and Adolescents with Specific IgE to Peanuts

1UO Pediatria, Dipartimento di Scienze Mediche e Chirurgiche, University of Bologna, Via Massarenti 11, 40138 Bologna, Italy
2Pediatric Department, Azienda Ospedaliera-Universitaria, Department of Clinical and Experimental Medicine, University of Parma, Via Gramsci 14, 43126 Parma, Italy

Received 3 May 2013; Revised 22 September 2013; Accepted 10 October 2013

Academic Editor: Robert Movérare

Copyright © 2013 Elisabetta Calamelli et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Peanuts are one of the most relevant foods implicated in IgE-mediated adverse reactions in pediatric population. This study aimed to evaluate the pattern of sensitization towards five peanut allergenic components (rAra h 1, 2, 3, 8 and 9) in a population of Italian children and adolescents with specific IgE (sIgE) to peanut. rAra h 9 was the main allergen implicated in peanut sensitization (58%), followed by rAra h 8 (35%), rAra h 2 (27%), rAra h 3 (23%) and rAra h 1 (12.5%). rAra h 1, 2, and 3 were the main allergenic components in young children: 8/13 (62%) between 2 and 5 years, 8/23 (35%) between 6 and 11 years, and 3/12 (25%) between 1 and 16 years. No differences were found among the levels of sIgE towards rAra h 1, 2, 3, and 9 in the three groups; in contrast, the levels of sIgE against rAra h 8 showed an increasing trend according to age. In conclusion rAra h 1, 2, and 3 were the prevalent sensitizing allergens during the first years of life in Italian patients with sIgE to peanuts (“genuine” allergy); in contrast rAra h 9 and 8 were mainly involved in school-age children and adolescents with pollen allergy (“secondary” sensitization).