The Level of Mite Dermatophagoide's Allergens (Der-p 1 and Der-f 1) in Birjand

House dust mite allergens especially pyroglyphid species are among the most important indoor allergens and have an important role in development of asthma and allergies. In current study, the level of two main allergens from mites including Der-p1 and Der-f 1 in dust of 28 homes in Birjand city was measured by ELISA method. All samples were negative for Der-p1. Low leverl of Der-f 1 was detected in one sample. Prevalence of asthma, rhinitis and rhinoconjunctivitis was 2%, 28% and 15% respectively. The results of this study suggest that House dust mites could not grow in Birjand climate.