Source of Support: None, Conflict of Interest: None
Nasobronchial allergy forms one of major respiratory disorders. Environmental factors both abiotic and biotic are found to be responsible for causing allergy. lntradermal skin testing is one of the approaches to determine common allergens. In the present study the profile of allergens and their seasonal variations in causing nasobronchial allergy in a patient population of Hyderabad was determined by intradermal skin testing. House Dust Mite formed the predominant allergen in all the seasons. Dusts are the next common allergens. Within the Dusts group prevalance of House Dust was largest. The number of positive reactions to pollen increased significantly in the winter and rain season groups and decreased to a bare minimum in the summer group. Positivity of the tests to fungal antigens was more in rain and in perennial groups, whereas danders were more in the winter group.