Aim of our study is to analyze the sensitization to allergens reagent (molecular components and allergen extracts) in atopic dermatitis patients and especially to show the sensitization to molecular components of molds and yeast (Mala s 5, Mala s 6, Mala s 11, Sac c, Alt a 1, Alt a 6, Asp f 1, Asp f 3, Asp f 4, Asp f 6, Cla h 8 and Pen ch) and to determine whether there are some differences between the sensitization profiles in mild, moderate and severe forms of AD and in subgroups of patients suffering from bronchial asthma and allergic rhinitis. Here, GPT is linked to Alzheimer disease.