Source: Annual Congress 2002 - Epidemiology of asthma, rhinitis and allergy
Disease area: Airway diseases, Paediatric lung diseases

Abstract

We studied sensitization to allergens in Mongolia. Family doctors interviewed a random sample of 9453 10-60 years old people by a standard respiratory questionnaire in city, small towns and villages. We examined a subsample of 869 people (participation rate 50.0%) in a clinical study. Clinical asthma and allergic rhinoconjunctivitis were defined by symptoms and findings in spirometry, methacholine or bronchodilation test and skin prick tests.
Occurrences of reported asthma and allergic rhinoconjunctivitis in the questionnaire study were 2.8% and 13,3%, respectively. In the clinical study, sensitization to any of the 16 allergens was 50.3% among people with reported asthma, 48.8% with clinical asthma, 52.1% with reported allergic rhinoconjunctivitis, 20.2% without reported asthma or rhinoconjunctivitis and 11.8% without clinical asthma or rhinoconjunctivitis. Sensitization to pollen, animals, mites / cockroach and molds was 27.5%, 21.3%, 28.8% and 3.8% among clinically asthmatics, 62.2%, 33.9%, 54.3% and 5.5% among people with clinical allergic rhinoconjunctivitis and 3.1%, 2.4%, 8.5% and 1.3% among people without either of the clinical diagnoses. Among the sensitized people 67.0% of those who lived in city or towns compared to 48.8% of those who lived in villages were sensitized to more than one allergen.
People with atopic diseases were most commonly sensitized to pollen, mites and cockroach. Animal sensitization was less prevalent. Mite and cockroach sensitization was common among healthy people. Sensitization to multiple allergens was less frequent in the villages.

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A. Viinanen, S. Munhbayarlah, T. Zevgee, T. Tseregmaa, T. Lkhagwasuren, L. Narantsetseg, T. Naidansuren, M. Koskenvuo, H. Helenius, E. O. Terho (Turku, Finland; Ulaanbaatar, Mongolia). Sensitization to aeroallergens in Mongolia. Eur Respir J 2002; 20: Suppl. 38, 810

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