title: Prevalence of oral allergy syndrome in children with allergic diseases.
abstract: BACKGROUND
  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.
authors: Servicio 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. Electronic address: drmbedbar@gmail.com.
authors: M
authors: M
authors: Bedolla-Barajas
authors: Servicio de Alergología e Inmunología Clínica, Hospital Civil de Guadalajara "Fray Antonio Alcalde", Coronel Calderón No. 777, Colonia El Retiro, Guadalajara, Jalisco, C. P. 44280, Mexico.
authors: A
authors: A
authors: Kestler-Gramajo
authors: Servicio de Alergología e Inmunología Clínica, Hospital Civil de Guadalajara "Fray Antonio Alcalde", Coronel Calderón No. 777, Colonia El Retiro, Guadalajara, Jalisco, C. P. 44280, Mexico; Centro Universitario en Ciencias de la Salud, Universidad de Guadalajara, Sierra Mojada No. 950, Colonia Independencia Oriente, Guadalajara, Jalisco, C.P. 44340, Mexico.
authors: G
authors: G
authors: Alcalá-Padilla
authors: Instituto de Salud Pública, Universidad Veracruzana, Av. Luis Castelazo Ayala s/n., Colonia Industrial Ánimas, Xalapa, Veracruz, C. P. 91190, Mexico.
authors: J
authors: J
authors: Morales-Romero
mesh_terms: D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D000485:Allergens / Q000276:immunology; D031230:Ananas / Q000276:immunology; D001249:Asthma / Q000453:epidemiology*; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D005512:Food Hypersensitivity / Q000453:epidemiology*; D006801:Humans; D008297:Male; D008800:Mexico / Q000453:epidemiology; D011058:Pollen / Q000276:immunology; D029963:Quercus / Q000276:immunology; D065631:Rhinitis, Allergic / Q000453:epidemiology*; D011795:Surveys and Questionnaires
chemical_list: D000485:Allergens
keywords: Child; Cross-reactions; Food hypersensitivity; Pollen; Risk factors