[The impact of the chemical factor on children's health with account of the early stages of ontogenesis].

: The study was performed in three towns of the Irkutsk region. For the study the dependence of the "chemical load in the different periods of ontogeny--the health of children" there were formed 4 groups according to the place of the work of parents (wood chemical manufacturing, alumimum plant, petrochemical plant, chemical plant) and 2 control groups with account of the place of residence of children (in areas with high and with moderate levels of ambient air pollution). The rate of the primary morbidity and chronic pathology morbidity of the upper respiratory tract in children were established to be dependent on the direct and indirect (at the early stages of ontogeny) the impact of the chemical factor.