title: [Food allergy diagnosis in patients with elimination diet history. Preliminary report].
abstract: BACKGROUND
  Food allergy diagnosis is performed by a double blind placebo controlled challenge; however, in a lot of patients, it is only based on clinical history, skin prick tests, or parents' perception. There is a high frequency of elimination diets without an adequate approach.
  
  
  OBJECTIVE
  To analyze the results of diagnostic tests in a group of children with elimination diet-based on suspected food allergy and verify such studies with double blind placebo-controlled test challenge.
  
  
  METHODS
  An observational, analytical and prospective study was done in a group of patients with elimination diet for suspected food allergy. We performed prick test, Prick-to-Prick test and patch test and the positive ones were verified by double-blind placebo-controlled challenge.
  
  
  RESULTS
  Fourty-three patients were included within a total of 1,935 tests. Both approach for immediate and late sensitivity had not statistically significant relationship between a positive test and the elimination of food. Until now, we had 4 (8%) positive challenges out of 50.
  
  
  CONCLUSIONS
  The frequency of allergy proved by double-blind placebo-controlled test in 50 challenges was of 8% (4/50), thus, in the preliminary report we found a high frequency of elimination diets without adequate support. It is very important that food allergy diagnosis is accurate and based on an appropriate approach; since the implementation of an elimination diet in pediatric population can have a negative influence on their growth and development.
authors.affiliation: Servicio de Alergia e Inmunología Clínica Pediátrica, Hospital Infantil de México Federico Gómez, México, DF. blancadelrionavarro@gmail.com.
authors.forename: Elsy Maureen
authors.initials: EM
authors.lastname: Navarrete-Rodríguez
authors.forename: Blanca Estela
authors.initials: BE
authors.lastname: Del Río-Navarro
authors.forename: César Fireth
authors.initials: CF
authors.lastname: Pozo-Beltrán
authors.forename: Daniela Edith
authors.initials: DE
authors.lastname: García-Fajardo
authors.forename: Omar Josué
authors.initials: OJ
authors.lastname: Saucedo-Ramírez
authors.forename: Enrique Emanuel
authors.initials: EE
authors.lastname: Castelán-Chávez
keywords: Double-blind placebo controlled challenge; Elimination diet; Food allergy; Immediate hypersensitivity; Late hypersensitivity