[An electron microscopic study of the interaction of bacterial intestinal microflora and rotavirus virions].

Transmission electron microscopy has revealed the capacity of rotaviruses for adsorption on Escherichia coli, Klebsiella pneumoniae, Proteus mirabilis cells and the absence of such capacity with respect to Enterococcus faecalis, Lactobacillus casei and Edwardsiella tarda. Different degrees and a varying character of the adsorption of rotaviruses by the representatives of the opportunistic group of bacteria have been established, which may aggravate the course of rotavirus diarrhea due to the aggregation of viral particles. For the first time the phenomenon of the selective destructive adsorption of rotaviruses by E.

[The adhesion of pathogenic microflora on carbon sorbents].

The adsorbing activity of granulated carbonic sorbents SKN and KAU, as well as their oxidated forms, containing protogenic carboxylic and phenolic groups with respect to Shigella flexneri, Salmonella typhimurium, Escherichia coli, Streptococcus aureus and Pseudomonas aeruginosa pathogenic strains has been studied. As shown in this study, the process of interaction between microorganisms and carbonic sorbents has two stages. At the first stage the main role is played by long-distance electrostatic forces and at the second stage, by Van der Waals short-distance forces, as well as bonds formed between cell structures and surface groupings of carbonaceous materials.

[Characteristics of the tissue population cycle of shigellae].

In experiments on human fetal intestinal explants infected with shigellae the specific multiplication rate of these infective agents, found to be 0.026, and the maximum level of their accumulation in erythrocytes, reaching 22-36 microbes per cell, have been determined. These phenomena can be observed after at least 3-hour incubation and end in the release of the infective agents from the affected area with shedding epithelial elements (villi).

[Dynamics of Shigella interaction with the epithelium in the infection process].

The study of the adhesion of Shigella flexneri to intestinal mucosal explants from human postabortion fetuses, used as an experimental model, has revealed that the process of interaction between the infective agent and the epithelium develops in accordance with Langmuir's equation of the adsorption isotherm. The specific biological feature of the adhesive interaction between bacteria and the mucous membrane is the fact that the effective adhesion of microbes is possible only in case of their high concentration on the surface of the mucous membrane. In case of their low concentration in the parietal layer no microbial adhesion is observed, whereas epithelial villi infected with shigellae and fixed to the mucous membrane of the explant produce a high parietal concentration of the infective agents, which leads to the increase of adhesion by more than two orders.