GEOCHEMICAL CHARACTERISTICS OF LEAD CONTENT ON THE TERRITORY OF ORENBURG REGION AND ASSESSMENT OF ITS INFLUENCE ON THE INTESTINAL MICROBIOTA OF ANIMALS
The purpose of the research was to study the ecological and geochemical distribution of lead in the Orenburg region and to assess its impact on the intestinal microbiota of animals. To achieve this goal, the following tasks have been set: 1 to study the geochemical distribution of lead on the territory of the Orenburg region; 2. to use rats as specimen to assess the impact of lead on the representatives of the facultative-anaerobic microbiota of animals' intestines. In the course of studies conducted, it has been established that the maximum concentrations of this element were recorded in Western Orenburzhye, which, according to the authors, could be conditioned only by geochemical peculiarities, because there are no anthropogenic factors in the area, contributing to increase of the concentration of this xenobiotic in soil. When assessing the effect on the microbiota, it was found that biotoxicity and bioaccumulation of lead cations had common correlation patterns. It has been shown that L. acidophilus is the least resistant of all the microorganisms under study, the percentage of which in the composition of the microbiota is the highest of the total biomass