[Micro-ecological aspects of studies on the effect of antibacterial drugs on intestinal microflora].

Possible characterization of intestinal microflora as an integral system after exposure to antibacterial drugs was studied. Microflora of the contents and mucosa of the jejunum and large intestine in control rats and in rats exposed to metronidazole was studied and numerical indicators characterizing ratios of dominating and accompanying microbial groups in the intestine biotope++ were developed. With this purpose the proportion of the microbial groups in the total quantity of the microbes of a microbiocenosis was determined by the data on microflora quantitative composition. On the basis of detected wide species variety of microorganisms potentially dominating by their biotope numerical limits of the norm were determined only for the microbial groups of the accompanying microflora. The total proportion of the accompanying microbial populations under the normal conditions and the detected measure of deviation (reverse, partial) from the ratio of the dominating and accompanying microorganisms peculiar of the given biotope++ in separate subjects promoted estimation of microbiocenoses of definite biotope of the intestine as a whole.