Impactul unor agenţi microbieni din familia Streptococcaceae în activitatea vitală a organismului uman şi animal

Abstract

Background: Enterococci make up a part of the microbial flora of the human digestive tract and fulfil an important role in colonizing the mucosa by supplying the mucosal resistance. At the same time they are considered the representatives of conditionally pathogenic microflora, contributing to the self emergence of the infection, including the gastrointestinal one. Material and methods: The materials of the research have been the contents of the bowel (rectum) of children and young agricultural animals and the monostrains of the microorganisms in the form of Streptococci. The isolation of Enterococci has been achieved by the numerical determination of their level in the vaccination of the samples of the bowel (rectum) contents on a selective nutrient agar medium with ball, esculin and free sodium azide (currently offered by the firm Himedia) and depending on the functional status of the studied subjects. Results: The microorganisms of the family Streptococcaceae, isolated from the contents of gastrointestinal tract of humans and animals, have been classified in 3 species: Enterococcus (74.17), Streptococcus (12.63) and Lactococcus (13.18%). It has been established experimentally that the quantitative level of Enterococcus in the content of the gastrointestinal tract of children and young agricultural animals is constant, depending on its functional status and the health condition of the macroorganisms. Of the Enterococcus species (the representative of Streptococcaceae family) only the species Enterococcus faecium has showed a positive influence on the vital activity of man and animal organisms, being not only belonging to the Enterococcus species with the numerical prevalence, but also having a wide spectrum of non-pathogenic and probiotic properties. Conclusions: The defined properties of probiotics can be used in the pharmaceutical industry as an informative test in the selection of the prospects for enterococci. At the same time we recommend that in carrying out the additional measures on correction of bowel bacteriocenosis the strains of enterococci with probiotic properties should be used at the large scale.