Common Allergens in patients with Allergic disorders in Zahedan

Allergens cause different sign and symptoms in patients with allergic disorders. In order to
determine the common allergens among patients with allergic disorders in Zahedan City, center of
Sistan-Blouchestan province, this study was performed.
Eight hundred and ninety-four patients who referred to Immunology and Allergy Medical Center
of Khatam Hospital during 36 months period (2000-2003) was studied. Skin-prick tests (SPTs) to
common allergens were performed in all of the patients.
Eight hundred and ninety-four patients (382 male and 512 female), aged 2-70 years, had allergic
disorders. The most frequent allergic disease was rhinitis, seen in 481 patients (53.8%). The other
common disorders were asthma in 215 patients (24.1%), and urticaria in 137 cases (15.3%).
Among the SPT-positive patients, a positive prick test reaction to the house dust mites (86.4%),
Feathers (75.5%), and Aspergillus (51.1%) was most common, followed by Cladosporium (39.8%),
Alternaria (37.9%), Trees (37.7%), Penicillium (36.6%), Weeds (34.9%), and Fruits (31.2%). Also,
23.8% of the subjects were sensitized to Grasses in the prick test, Hen's egg (21.8%), Walnut (16.7),
Cow's milk (14.4%), Beef meat (11.6%), and Hazel nut (8.6%) accounting for other positive
reactions.
The prevalence of common allergens especially mite allergen is high among patients with
allergic disorders in Zahedan.