[Air pollution and the occurrence of recurrent respiratory tract diseases in children during the first years of life].

The authors investigate in a group of 211 children aged 2-6 years, incl. in particular a group of 33 2-year-old ones, in 1990 and checked in 1991 at two sites in Bratislava--a town with a varying concentration of NOX, SO2, dustiness and dust fallout--their influence on the incidence, type and course of relapsing respiratory disease. In both sites the concentrations of the mentioned noxious substances were beneath levels admitted by hygienists. In the place with higher concentrations, in particular of NOX, a significantly higher number of serious forms of relapsing respiratory diseases was recorded and an adverse course of the diseases in 2-6 year-old children and in particular in the 2-year-old ones.