Abstract
Atopic dermatitis (AD) is a chronic recurrent inflammatory skin disease. There are a lot of evidences on the importance of vitamin D and house dust mite (HDM) allergens in the etiology and course of AD. The objectives of this study are to evaluate the relation between vitamin D3 level and house dust mites (HDM) Dermatophagoidspecies sensitization in pathogenesis of atopic dermatitis. Cross-sectional design study was conducted on 50 atopic dermatitis patients. Blood analysis were done to determine level of vitamin D3, total IgE by fluorescent immunoassay & specific IgE for HDM (d1, d2) & other inhalant allergens by ELISA test. There was significant high negative correlation with the specific IgE for HDM (r = -0. 62, p < 0.001) and vitamin D3. & there was non-significant minimal negative correlation with the specific IgE and other inhalant allergens (r = - 0.10, p > 0.05). There was a statistically significant relation between level of vitamin D3 and atopic dermatitis severity and sensitization to HDM and other allergens.