Glycyphagus Domesticus Allergen Extract. Determination of the in Vivo Biological Activity in Histamine Equivalent Units (HEP).
- Conditions
- Rhinitis, Allergic, SeasonalConjunctivitis, Allergic
- Registration Number
- NCT00917488
- Lead Sponsor
- Laboratorios Leti, S.L.
- Brief Summary
The main purpose of the trial is to prove the therapeutic value of the product and enable an effective and safe dosage schedule to be recommended
- Detailed Description
The objective of this study is to determine the biologic activity of a Glycyphagus domesticus allergen extract in histamine equivalent prick (HEP) units, in order to be used as in-house reference preparation (IHRP).
The skin testing procedure, based on the Nordic Guidelines is the reference method for the biological calibration of in-House Reference Preparations (IHRP). The method is not intended for routine testing of allergen extracts. The use of this procedure is the basis for the definition of biological activity units: "the activity of an allergen extract is 10,000 Biological Units (BU) per ml (10 HEP per ml), when the extract provokes an specific skin reaction in the median sensitive patient with a wheal of the same size as a wheal provoked by a positive reference solution consisting of histamine 54.3 mmol/l (for example histamine dihydrochloride 10 mg/ml), when both solutions are administrated using the same technique (prick testing) on at least 20 individuals who are clinically allergic and cutaneously reactive to the allergen concerned".
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 27
Not provided
Not provided
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Primary Outcome Measures
Name Time Method Wheal size area (mm2) on the skin at the site of the puncture during the immediate phase. 45 minutes per subject
- Secondary Outcome Measures
Name Time Method
Trial Locations
- Locations (1)
Clinica Dr. Lobatón
🇪🇸Cádiz, Cadiz, Spain
Clinica Dr. Lobatón🇪🇸Cádiz, Cadiz, Spain