Egg-OIT involves substantial risks. However, baseline parameters, particularly sIgE, may help identify children in whom the procedure is more likely to be safe. Egg-OIT safety needs improvement in children with more severe and persistent egg allergy.
Background: Patterns of sensitization to house dust mites depend on geographic area and are important in clinical practice. However, the role of molecular diagnosis is not currently defined. We sought to characterize a pediatric population by focusing on sensitization to different mite species and major mite components in order to assess the clinical relevance of sensitization to allergenic components in our practice. Methods: Consecutive children with respiratory allergy sensitized to house dust mites (determined by skin prick test [SPT]) were recruited. We determined specific IgE to nDer p 1, rDer p 2, and rDer p 23 using ImmunoCAP and sIgE using ImmunoCAP-ISAC microarray. Patients were followed up for 3 years. Results: A total of 276 children were recruited. The frequency of sensitization was 86.6% for nDer p 1, 79.3% for rDer p 2, and 75.8% for rDer p 23. Lepidoglyphus species was the most common storage mite detected by SPT. Twenty-six patients (9.4%) were not sensitized to Der p 1 or Der p 2. It is noteworthy that IgE binding to Der p 23 was positive in 14 (53.8%). Asthmatic patients, especially those with a persistent moderate-severe phenotype, more frequently recognized the 3 major allergens. Conclusions: Most patients with mite allergy were sensitized to the major allergens Der p 1, Der p 2, and Der p 23. Of the allergens evaluated, 5% were sensitized to Der p 23 but not to Der p 1 or Der p 2. Sensitization to Der p 23 should be considered in the diagnosis and treatment of mite allergy, especially in patients with moderate-severe asthma, because it may worsen the clinical phenotype.
ResumenAntecedentes: El perfil de sensibilización a los ácaros del polvo depende del área geográfica y es importante en la práctica clínica. Sin embargo, el papel del diagnóstico molecular no ha sido del todo definido. Nuestro objetivo fue la caracterización del perfil de sensibilización de una población pediátrica a diferentes especies de ácaros; y evaluar la sensibilización a componentes alergénicos y su relevancia en nuestra práctica clínica. Métodos: Se reclutaron de forma consecutiva pacientes con alergia respiratoria y sensibilización a ácaros del polvo doméstico mediante pruebas cutáneas. Se determinó la IgE específica por ImmunoCAP a nDer p 1, rDer p 2, rDer p 23 y la sIgE mediante el microarray de ImmunoCAP ISAC. Los pacientes fueron evaluados durante tres años según práctica cínica habitual. Resultados: Se reclutaron un total de 276 niños. La sensibilización fue de 86,6% a nDer p 1, 79,3% a rDer p 2 y 75,8% a rDer p 23. Lepidoglyphus fue el ácaro de almacén más común según prueba cutánea. Un total de veintiséis pacientes (9,4%) no estaban sensibilizados a Der p 1 ni Der p 2; cabe destacar que 14 de ellos (53,8%) presentaban IgE positiva a Der p 23. Los pacientes con asma, y en especial los de fenotipo persistente moderado y grave, reconocieron con mayor frecuencia los tres alérgenos mayores. Conclusiones: La mayoría de nuestra población pediátrica con alergia a ácaros está sensibilizada a los alérgenos mayores Der p...
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