FARE Clinical Trial Finder

Simplify your search for a clinical trial and help researchers discover new therapies. The FARE Clinical Trial Finder links patients with food allergy and healthy, non-patient volunteers to actively recruiting food allergy studies.

Basophile Activation Testing (BAT) in Hazelnut Allergy (Hazelnut BAT Study)

Study Purpose

The proposed study intends to compare the outcome of food challenge in hazelnut allergic patients with the outcome of basophile activation tests using hazelnut extract and components.

Recruitment Criteria

Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms

Accepts Healthy Volunteers

An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes.

An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes.

Searching Both is inclusive of interventional and observational studies.

Study Type
Eligible Ages 14 Years and Over
Gender All
More Inclusion & Exclusion Criteria

Inclusion Criteria:


Inclusion criteria:

  • - Male and female subjects, age ≥ 14 years - Informed Consent as documented by signature Secondary inclusion criterion - Group A: positive case history of allergic reaction(s) to hazelnut positive double-blind placebo-controlled food challenge with hazelnut or positive titrated open food challenge with hazelnut or unambiguous case history of an anaphylactic reaction after hazelnut will be included without provocation - Group B:positive skin test (SPT) with birch pollen and hazelnut and negative food provocation with hazelnut.
- Group C: negative case history of hazelnut and birch allergy and negative skin test (SPT) with hazelnut and birch pollen and negative food provocation with hazelnut

Exclusion Criteria:

- Drugs not allowed due to interference with the food challenge (or shortest interval between last treatment and food challenge): corticosteroids systemically (2 weeks), antihistamines (3 days), beta blocker (1 day), angiotensin converting enzyme (ACE) inhibitors (2 days), omalizumab (2 months) - Women who are pregnant - Lack of safe contraception - Uncontrolled asthma, forced expiratory volume (1 second) <70% predicted value - Acute allergic disease - Chronic urticaria - Mastocytosis - Other clinically significant concomitant disease states - Known or suspected non-compliance, drug or alcohol abuse, - Inability to follow the procedures of the study - Participation in another study with investigational drug within the 30 days preceding and during the present study

Trial Details

This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries.

Trial ID:

Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans.

Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data.

Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs.

Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use.


The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data.

Lead Sponsor
University of Zurich

The person who is responsible for the scientific and technical direction of the entire clinical study.

Principal Investigator
Barbara Ballmer-Weber, Prof.
Principal Investigator Affiliation Allergy Unit, Department of Dermatology, University Zürich

Category of organization(s) involved as sponsor (and collaborator) supporting the trial.

Agency Class
Overall Status Active, not recruiting
Countries Switzerland

The disease, disorder, syndrome, illness, or injury that is being studied.

Food Allergy
Additional Details

Accurate diagnosis of food allergy depends on food challenge outcome. The proposed study intends to compare the outcome of food challenge in hazelnut allergic patients with the outcome of basophile activation tests using hazelnut extract and components to evaluate the diagnostic utility of basophile activation testing. With a view towards improved in vitro diagnostic methods, the investigators intend to evaluate the diagnostic potential of basophile activation testing in patients with hazelnut allergy confirmed by a positive provocation or supported by a convincing history of anaphylactic reaction(s) to hazelnut in the past, patients with pollinosis but no symptoms of hazelnut allergy and non-atopic control subjects.

Contact a Trial Team

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International Sites

Zürich, Switzerland



Allergy Unit, Department of Dermatology, University Hospital

Zürich, , 8091

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