Aeroallergens, atopy and allergic rhinitis in the Middle East.

The literature on the nature and prevalence of indoor and/or outdoor aeroallergens, atopy and symptoms of rhinitis and asthma in the Middle East region (defined here as Bahrain, Egypt, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Palestine, Qatar, Kingdom of Saudi Arabia - KSA, Syria, United Arab Emirates and Yemen) was reviewed. Although documentation was poor in all countries other than Iran and the KSA, a wide range of "global" and "local" aeroallergens (grass, weed and tree pollens, fungal spores, insect allergens, dander, and house dust mites) has been observed across the region. The prevalence of current self-reported or parent-reported symptoms of rhinitis ranged from 9% to 38%. Researchers have suggested that the high atopy rates and self-reported rhinitis rates are associated with an on-going shift towards a "western" lifestyle.