[Drug resistance of Staphylococcus aureus strains, isolated from children with intestinal dysbacteriosis]. / Lekarstvennaia ustochivost' shtammov Staphylococcus aureus, vydelennykh u dete s disbakteriozom kishechnika.

The level of antibiotic-sensitivity of 73 S. aureus strains isolated from children with dysbacteriosis of the large intestine in an outpatient clinic was determined. The isolation rate of polyresistant strains was 44%. Methicillin-resistant S. aureus (MRSA) were isolated from 25 children (34.2%). 60% of MRSA strains could not be typed with the international set of phages. Among the strains capable of being lyzed by the phages the representatives of phage groups 3 and 4 prevailed. All MRSA strains were sensitive to vancomycin, 84-88% of the strains were sensitive to chloroamphenicol, rifampicin, spiramycin and neomycin, 80% of the strains were sensitive to fusidin and phosphomycin. The level of sensitivity of methicillin-sensitive S. aureus strains (MSSA) to different groups of antistaphylococcal antibiotics was higher. 36-64% of MRSA strains and 21-27% of MSSA strains were resistant to the action of curative bacteriophages. The suppression of obligate microflora was the risk factor in the development of staphylococcal infection of the gastrointestinal tract in children.

[The frequency of staphylococcal colonization of the intestines in children with the manifestations of dysbacteriosis]. / Chastota kolonizatsii stafilokokkami kishechnika u detei s iavleniiami disbakterioza.

In 2100 children of different age groups the microbiocenosis of the large intestine was studied. The study revealed that the colonization of the mucous membrane of the large intestine with staphylococci developed in 30% of children with intestinal dysbacteriosis. Young children were mainly affected (91%). The prevailing species among isolated staphylococci was S. aureus (86%), capable of persistence in the intestine (30.9%). In children non typing S. aureus strains mainly circulated (70%), and among phage-typing strains isolates of phage group III prevailed (70.2%). The colonization of the intestine with coagulase-negative staphylococci was possible (14%). Microecological intestinal disturbances in children of different age groups were characterized by different degrees of changes in normal microflora with the prevalence of opportunistic microorganisms in the microbial picture.

[Effects of different types of general anesthesia on metabolic activity of erythrocytes]. / Vliianie razlichnykh vidov obshchei anestezii na metabolicheskuiu aktivnost' éritrotsitov.

The effect of general anesthesia with ether, azeotropic mixture and drugs for neuroleptanalgesia on the activity of glycolytic enzymes and the content of glycolysis metabolites in erythrocytes has been studied in 212 patients with II to IV stage gastric cancer. It has been shown that ether anesthesia and anesthesia with azeotropic mixture aggravate metabolic disturbances, while neuroleptanalgesia has no negative effect on cellular metabolism. The absence of correlation between the severity of surgical intervention and the degree of disturbances in erythrocyte metabolism indicates a sufficient anesthesiological protection when drugs for neuroleptanalgesia are used.

[Electron microscopic study of the cytopathogenic action of meningococci in a continuous human amnion cell culture]. / Elektronno-mikroskopicheskoe izuchenie tsitopatogennogo deistviia meningokokkov na perevivaemuiu kul'turu kletok amniona cheloveka.

The electron-microscopic study of the interaction of meningococci with continuous human amnion cell culture F1 has revealed that this process comprises 3 stages. The study has shown that, following the adhesion of meningococci to the surface of cells F1, these cells are invaded by individual coccal forms of meningococci. In response to infection vacuoles appear in the cytoplasm of the cells. Meningococci are either phagocytosed inside these vacuoles, or their release into the intercellular space and the death of the infected by meningococci are observed. When the cells are infected by cytopathogenic strains, the infectious process results in the appearance of degenerative changes in the cells.

[Cellular ultrastructure of the meningococcus when incubated in a continuous culture of human FL-line amnion]. / Ul'trastruktura kletok meningokokka v usloviiakh inkubatsii ikh v perevivaemoi kul'ture amniona cheloveka linii FL.

Some details of the ultrastructure of several meningococcal strains having had contacts with cells in continuous human amnion cell culture FL for 6 hours to 2 days have been defined with greater precision by means of electron microscopy. The study has shown that the contact of meningococci with the tissue culture is accompanied by the appearance of meningococcal forms with the defective cell wall, similar to L-forms: spheroplast, protoplast, gigantic cells and microcells, as well as budding variants. The meningococcal variants with the defective cell wall, appearing in the cell culture, and the forms occurring (in different proportions) in "ripe" meningococcal populations developing in the culture media for a long time and isolated from a human body have been found to have no essential differences in their fine structure. These data indicate that any external influences (meningococci are highly sensitive to such influences) produce sufficiently rapid changes, similar to L-transformation, in the fine structure of these microorganisms.

[Interactions between Neisseria meningitidis and cell cultures (data of cytomorphologic studies)]. / Vzaimodeistvie Neisseria meningitidis s kul'turoi kletok po tsitomorfologicheskim nabliudeniiam.

The present work shows that the cytopathogenic action of N. meningitidis on continuous human amniotic epithelial cell culture FL begins from their active adhesion and subsequent invasion. The degree of the manifestation of the cytopathic effect depends on the capacity of the infective agent for adhesion and invasion and on its biological properties, as well as on the initial state of the cells. The infection of the cells is accompanied by disturbances in their mitotic activity together with the lesions of their chromosomal apparatus. The cells die either in the state of degenerative mitosis, or as the result of the rupture of the cytoplasm in massively invaded cells. The response of the cells to the invasion of faintly cytopathogenic and noncytopathogenic strains takes the form of nonprofessional phagocytosis.

[Characteristics of nonpathogenic Neisseria and Branhamella catarrhalis based on cytopathogenicity]. / Kharakteristika nepatogennykh neisserii i Branhamella catarrhalis po tsitopatogennosti.

The study of the action of 12 Neisseria species belonging to 112 strains, 6 B. catarrhalis strains and 202 meningococcal strains on the culture of continuous cell line F1 (human amniotic cells) has revealed that nonpathogenic Neisseria are essentially weaker than meningococci in their pathogenicity (expressed in terms of CPD50). Among nonpathogenic Neisseria highly cytopathogenic strains occur in 13.9% of cases, which gives grounds for considering them opportunistic bacteria. Sharply pronounced correlation between the adhesive and pathogenic properties of Neisseria has been observed. The cytopathogenic action of Neisseria is accompanied by the lesion of the chromosomal apparatus of mitotic infected cells.