Sensitivity and Specificity of 3 Solutions of Allergen Extract for Diagnosis by Skin Prick Testing

Inclusion Criteria: * Written informed consent to participate in the study * Male or female subjects aged 5-60 years inclusive * Female of childbearing potential must be on a reliable method of contraception and have a negative urine pregnancy test * Presence of a clinical history of allergy: seasonal or perennial rhinitis, conjunctivitis and/or asthma during grass or birch pollen seasons (at least two pollen seasons) and/or due to mite exposure (at least two years) * Subjects affiliated to a social security system Exclusion Criteria: * Pregnant or breastfeeding women * Dermographism * Absence of cutaneous reactivity * Presence of cutaneous lesions on the forearms either preventing the performance of the test or potentially interfering with the interpretation of the test * Subjects presenting unstable asthma or poor general health condition * Subjects with past or current specific immunotherapy treatment for any of the 3 tested allergens (Grass, Birch pollens, D. pteronyssinus and/or D. farinae mites) in the previous 5 years * Any oral antihistaminic treatment in the previous 3 days or 10 days in case of loratadine or desloratadine * Subjects on anti-IgE treatment * Subjects treated with beta-blockers and/or anti-depressives. * Subjects currently participating in another clinical trial or still in exclusion period for a previous clinical trial * Investigators, co-investigators, as well as their children or spouses and all the study collaborators * Subjects under protection of the courts, legal guardianship or legal trusteeship