ABSTRACT
The purpose of the investigation was to comparatively study and to define the specific features of intestinal microbiocenosis in patients with lambliasis in different age groups of children and adults. Characterizing the age-related features of microbiocenosis in Lamblia infestation showed differences in 3 age groups: children aged less than 7 years and those aged 8-14 years, and adults; there were no statistically significant differences in the characteristics of microbiocenosis between age groups I and II, as well as age groups IV and V. Intestinal microbiocenotic changes in Lamblia infestation were less evident in the 8-14-year-old children: grade 1 microbiological changes characterized by a decrease in the normal flora were most common.