In this paper, findings are submitted from 11-yr bacteriological examination of children from the pre-school institutions in the city of Lviv. Stability was ascertained as was high level of nasopharyngeal carriage of the leading representatives of conditionally pathogenic microflora, an association was established to some disease forms. There is the need for the bacteria carriers to be identified in a purposeful and persevering fashion, with the relevant sanitary measures to be instituted in such individuals.
