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ISSN: 1734-1922
Archives of Medical Science
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vol. 14
Clinical research

Usefulness of molecular diagnosis in egg allergic children

Marianna I. Petrosino, Alessandra Scaparrotta, M. Loredana Marcovecchio, Daniele Panichi, Daniele Rapino, Marina Attanasi, Paola Di Filippo, Sabrina Di Pillo, Francesco Chiarelli

Arch Med Sci 2018; 14, 1: 132–137
Online publish date: 2016/03/23
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Introduction: Egg allergy is one of the most common food allergies in children. Egg white, including ovomucoid (OVM or Gal d 1) and ovalbumin (OVA or Gal d 2), is the major source of allergens. The aim of this study was to assess the role of Gal d 1 and Gal d 2 in predicting the risk of anaphylaxis caused by eggs in children, and to compare this new diagnostic tool with established methods of allergen-specific IgE detection.

Material and methods: One hundred and forty-eight children were divided into 2 groups according to a positive (group A, 33 children) or negative (group B, 115 children) history of anaphylaxis after ingestion/contact with eggs. All patients underwent an allergological evaluation by measurements of specific IgE against egg white: Gal d 1 and Gal d 2.

Results: Higher levels of Gal d 1, Gal d 2 and IgE against egg white were detected in group A compared to group B (p < 0.001). Although the area under the curve was similar for Gal d 1 and Gal d 2, egg white specific IgE showed a better sensitivity (85%) for a cut-off value ≥ 0.975 kUA/l, while Gal d 1 and Gal d 2 demonstrated a better specificity (90% and 80%, respectively) for cut-off values ≥ 1.460 kUA/l and ≥ 2.310 kUA/l, respectively.

Conclusions: Egg white specific IgE showed a similar ability as Gal d 1 and Gal d 2 in differentiating children at risk for egg anaphylaxis, although Gal d 1 and Gal d 2 showed a better specificity.

egg allergy, ovomucoid, ovalbumin, anaphylaxis, oral food challenge, children

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