and bedroom of healthy subjects in Mashhad city, north east of Iran. Patients and Methods: A group of fifty healthy volunteers without a history of respiratory system diseases were selected. Samples from the nasal cavity and different parts of the bedroom...

origin at homes of allergic patients with respiratory symptoms in the city of Mashhad,Iran. Methods: In this cross-sectional study,a group of patients with allergic rhinitis(n=50)were selected based on positive skin prick test. Healthy volunteers...