RESUMEN
According to the international "ISAAC" program, we studied the peculiarities of bronchial asthma in children at the age of 13-14 years, in various climatic and geographic regions of Azerbaijan. At the first stage of investigation, 14693 eighth class pupils of high school from the four various regions were surveyed: the I region (n=4979) - an industrial city, placed in a semi-desert area; the II region (n=3010) - rural areas, located in a semi-desert climatic zone; the III region (n=3133) - areas, located in a subtropical climatic zone; the IV region (n=3571) - an ecologically clean mountainous region, located along southern slopes of the Greater Caucasian ridge. At the second stage of the investigation allergological, clinical-functional examinations were carried out in children with symptoms of allergic diseases. It was established that prevalence of BA was reliably more frequent in the industrial city (4,6%) than in other three, especially rural areas. In subtropical climatic area 2,8%, in rural semi-desert area - 2,5%, in mountainous region - 1,8% of examined children were suffering from BA. Study of the clinical course of diseases in children with allergic diseases and their allergic status revealed that structure and expressiveness of sensitization to domestic, pollen, fungous and food allergens depends on residing area.