[Determination of the quantitative composition of fecal microflora].

Shifts in the quantitative composition of fecal microflora may be assessed by estimating the summary share (in per cent) of the bacterial groups associated with fecal microbiocenosis, this share being estimated by the nonparametric statistics methods. The ratio between potentially dominating and concomitant groups of microorganisms in fecal microbiocenosis helps estimate the severity of disorders in the quantitative composition of fecal microflora.

[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.

[Species composition of intestinal lactoflora of healthy rhesus monkeys].

The results of the study of the species composition of the fecal microflora of 15 healthy rhesus macaques, from whom 204 strains of lactobacilli have been isolated and identified, are presented. The intestinal microflora has been shown to include different species, subspecies and biovars of homo- and heterofermentative lactobacilli and to possess definite individual properties. L.

[Effect of antibiotics on intestinal microflora and production of metabolites].

Methodical approaches to detection of relation between intestinal microflora and its metabolites are described. The microbial origin of certain compounds can be asserted by a decrease in their production after exposure to antibacterial drugs or the absence of their production in microbe-free animals. The authors consider that parallel investigation of intestinal microflora and its metabolites after exposure to various agents e.