[Effect of allergy on airway reactivity in children with obstructive bronchitis].

Prevalence of allergy and it's influence on bronchial reactivity was evaluated in 50 children less than 3 years old. Control group consisted of 17 children of the same age with recurrent respiratory infections but without obstruction. The results of typical allergic tests were compared with nonspecific inhalation bronchial tests. The significant contribution of the allergens in the pathogenesis of obstructive bronchitis has been found. Causal relation between severe allergy to different allergens and bronchial hyperreactivity has been shown.