Prevalence of oral allergy syndrome in children with allergic diseases
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Published on: May 31, 2021
M Bedolla-Barajas1, A Kestler-Gramajo2, G Alcalá-Padilla3
1Servicio de Alergia e Inmunología Clínica, Nuevo Hospital Civil de Guadalajara "Dr. Juan I. Menchaca", Salvador de Quevedo y Zubieta No. 750, Colonia La Perla, Guadalajara, Jalisco, C. P. 44340, Mexico.
Insights
Oral Allergy Syndrome (OAS) affects nearly 9% of children with allergic diseases. This study found pineapple sensitivity and Quercus pollen are linked to OAS in this population.
Area of Science:
- Pediatric Allergy and Immunology
- Food Allergy Research
- Clinical Immunology
Background:
- Oral Allergy Syndrome (OAS) is often perceived as an adult condition, with limited exploration in pediatric populations.
- This study addresses the under-investigated prevalence and characteristics of OAS in children with existing allergic conditions.
Purpose of the Study:
- To determine the prevalence of OAS in children aged 6-14 years with allergic diseases.
- To identify common symptoms and associated pollen species linked to OAS in this pediatric cohort.
- To investigate the association between specific pollen sensitizations and the development of OAS.
Main Methods:
- A cross-sectional study involving 267 children (6-14 years) seeking initial allergy treatment.
- Data collected via structured questionnaires on demographics, clinical history, and OAS.
- Skin prick-by-prick tests used to confirm allergen sensitization, particularly for foods implicated in OAS.
- Logistic regression analysis employed to assess the association between OAS, pollen sensitization, and demographic factors.
Main Results:
- The overall prevalence of OAS was 8.9%, with similar rates in children with allergic rhinitis (8.8%) and asthma (9.1%).
- Prevalence of OAS varied from 9.6% to 12.2% among children sensitized to different pollens.
- Pineapple sensitivity was reported in 62.5% of children with OAS.
- Quercus species pollen demonstrated a significant association with OAS (OR=2.7) after adjusting for covariates.
Conclusions:
- Oral Allergy Syndrome is a relevant condition in the pediatric population studied.
- Pineapple emerged as the primary food allergen associated with OAS in this region.
- Sensitization to Quercus pollen, but not birch or olive pollen, was significantly linked to OAS in children.
Introduction:
The oral allergy syndrome (OAS) is a particular type of food allergy rarely explored in the paediatric population that is already considered an adult problem.
Objective:
Identify the prevalence of OAS, symptoms and pollen species associated with its presence in children affected by allergic diseases.
Methods:
A cross-sectional study was conducted. Consecutive sampling included children from 6 to 14 years who needed allergy treatment for the first time. A structured questionnaire was carried out to collect demographic and clinical data and history of OAS. Besides sensitisation to various allergens, the skin prick-by-prick test was performed to corroborate sensitisation to food related to OAS. Prevalence of OAS and its association with pollens was established following the covariate adjusted logistic regression.
Results:
267 subjects were included. Overall prevalence of OAS was 8.9% (95%CI 6.1-13.1%). Prevalence of OAS for allergic rhinitis and asthma were 8.8% and 9.1%, respectively. In patients sensitised to pollen, the prevalence ranged from 9.6% to 12.2% depending on the type of pollen. 62.5% of children with OAS were sensitive to pineapple. After adjusting for gender and family history of atopic disease, trees from the Quercus species showed an association with OAS (OR=2.7, 95%CI 1.2-6.2).
Conclusions:
OAS is not uncommon in our environment. Pineapple, a typical fruit from the region, was the main food related. Quercus sp., but not birch nor olive, was the pollen associated with this syndrome.
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