Efficiency And Tolerance Of Hazelnut Oral Immunotherapy Protocol In Hazelnut Allergic Children

Study Overview
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Brief Summary
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Prevalence of food allergy in the world has been inscreasing in recent years. Among nut allergy, hazelnut allergy is the most widespread in Europe and particularly in France. The current treatment for hazelnut allergy is based on eviction and wearing of an emergency kit with adrenaline auto-injector pens, to be used in the event of severe anaphylactic reaction. Oral immunotherapy (OIT) is a treatment that is now increasingly being offered as an alternatice to eviction. There are few published data concerning hazelnut OIT in Europe, where its consumption is nevertheless very high. The main objective of our study is to evaluate the clinical efficacy of the hazelnut OIT protocol, implemented since 2015 in the pneumology and allergology-paediatric department of the Mother and Child Hospital in Bron, in hazelnut allergic children under 18 years old. The secondary objectives will be to evaluate the biological efficacy and clinical tolerance of the protocol. The study is retrospective and observational, and is based on the collection of medical data from patient records.

Official Title
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Clinic And Biologic Efficiency And Tolerance Of Oral Immunotherapy Protocol In Hazelnut Allergic Children

Conditions
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Allergy, Nut, Pediatric ALL

Intervention / Treatment
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* Other: Clinical and biological characteristics


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Aged Under eighteen years old Hazelnut allergy (clinically and biologically) Under IOT hazelnut protocol in Pneumo/allergology-paediatric departement of the Mother and Child hospital in Bron Exclusion Criteria: Lack of consent to be included in the study (by their parents) Age > 18 years old

Ages Eligible for Study
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Minimum Age: 1 Year
Maximum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Hazelnut allergic children under oral immunotherapy<br>Children Under eighteen years of age Convincing clinical history of hazelnut allergy Positive hazelnut prick test or specific IgE Under IOT hazelnut protocol in pneumology and allergology-paediatric departement of the Mother and Child Hospital in Bron | Other: Clinical and biological characteristics<br>* Age at beginning of IOT Sex Atopic and non atopic Comorbidities Sensitization to aero-allergens Sensitization to trophallergens Stage of severity of the elicited reaction Hazelnut Specific IgE + Cor a 1,8,9,14 before IOT and during follow up Hazelnut skin prick test before IOT and during follow up Adverse effects of IOT and their stage (in hospital and at home) Use of adrenaline auto-injector (in hospital and at home) Maintenance dose<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| the proportion of patients in maintenance phase at the one-year consultation | Patients are in maintenance phase at the end of the up-dosing phase and take regularly a quantity of hazelnut, usually superior to 800 mg, considered an acceptable protective dose | at the one-year consultation | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Hazelnut, Oral Immunotherapy, Children, Protocol, Efficiency, Tolerance