Vol 94, No 2 (2017)

Aim. Study the frequency of occurrence of antibiotics resistant strains of various species of Corynebacterium non diptheriae. Materials and methods. C.pseudodiphtheriticum, C.pseudotuberculosis, C.xerosis, C.amycolatum, C.striatum, C.ulcerans strains isolated from patients with pathologies of respiratory and urogenital tract, as well as individuals taking prophylaxis examination were used. Sensitivity to antibacterial preparations was determined by the serial dilution method. Results. The highest number of Corynebacterium non diptheriae strains displayed resistance to benzylpenicillin (54.8%) and lincomycin (50.7%), and lowest - to cefotaxime, cefazolin (6.8%) and vancomycin (13.7%). The highest number of antibiotics resistant strains were detected among members of C.pseudotuberculosis {100%), C.xerosis (96.0%) and C. pseudodiphtheriticum (81.0%) species. Polyresistant strains were detected most frequently among C.xerosis, C.amycolatum and C.striatum species. Strains of Corynebacterium non diptheriae most frequently displayed resistance to 1 or 2 antibacterial preparations (24.7%), less frequently - to 3 (20.5%), 4 (13.7%), 5 (4.1%) and 6 (1.4%) preparations. Conclusion. The amount of antibiotics resistant strains of Corynebacterium non diptheriae is large (89.0%) and non-similar in various species.

Aim. Analyze HFRS morbidity in Russian Federation during the last 25 years (1990 - 2015). Materials and methods. Official statistics of Federal Service for Surveillance or. Consumers' Rights Protection and Human Weillbeing (CPS), including Federal Centre o: Hygiene and Epidemiology, were used for the analysis, as well as materials from regiona departments of CPS and centers of hygiene and epidemiology. Epidemiologic analysis wa: the main method. Statistical treatment of the results obtained was carried out using generally accepted methods of variation statistics with elements of system analysis. Results. For the studied period (1990 - 2015) 194 116 cases of HFRS were registered. Morbidity was registered in 8 federal districts of the Russian Federation in 58 subjects. The most intense epidemiologic situation was noted in Privolzhsky Federal District, that accounted for 86.4% of toti HFRS morbidity during the studied period. Analysis of morbidity was carried out in eve' federal district, most epidemically unfavorable territories are shown. Conclusion. The dau rresented on HFRS morbidity reflect unfavorable situation for this disease in Russian . deration. Measures to prevent the emergence of diseases to reduce the general level of morbidity in Russian Federation are presented.

Aim. Elucidation of the role of extrachromosomal elements of heredity in manifestations of toxic properties of Yersinia pestis. Materials and methods. The study was carried out in vaccine strain Y. pestis EV76 (pMTl, pCDl, pPCPl) and non-plasmid variants of vaccine EV76 (pMTl\ pCDl', pPCPl') and virulent 231 (рМТГ, pCDl’, pPCPl') strains of Y. pestis. Presence of functionally active form of lipopolysaccharide (LPS) in the incubation medium of the bacteria was evaluated via toxicity of supernatant of Y. pestis for intact animals (infection-toxic shock) and mice sensitized by D-GalN. Results. 37°C cultures of Y. pestis EV76 containing a full amount of plasmids were established to release LPS into the environment. Non-plasmid variants of both vaccine and virulent strains of Y. pestis pMTl', pCD Г, рРСР 1 do not have this ability. Separation of LPS from cell wall was detected in live bacteria of plague infectious agent. This process is assumed to be coupled with translocation of proteins coded by pMTl, pCDl, pPCPl plasmids from the cell into the environment. Conclusion. Functional interconnection between extrachromosomal elements of heredity and toxic activity of Y. pestis LPS is established for the first time.

Aim. Study immunologic phenotype of lymphocytes in the process of therapy of topic form of recombinant interferon-a2b during respiratory infections in pregnant. Materials aih. methods. 74 pregnant women from 14 weeks of gestation took part in the study, among their 55 - within 24 hours with symptoms of acute respiratory infection (ARI) of light and medium, severe course of infection, who do not need hospitalization. Group I - 34 pregnan omen with ARI receiving basic therapy with human recombinant interferon-a2b in gel form. Group 11 - 21 pregnant with ARI receiving only basic therapy. Control group had 19 pregnant omen without signs of ARI. Relative content of principle lymphocyte subpopulations was -:udied by flow cytofluorimetry: CD3+, CD3+CD4+, CD3+CD8+, CD3-CD19+, CD3-CD16+56+, CD3-CD8+; immune regulatory index was calculated in blood within 24 hours 'om the onset of the disease and 8 - 10 days later. Results. A disbalance of lymphocyte subpopulations was noted in pregnant women with light or medium severity course of acute 'espiratory infections, that was characterized by an increased content of CD3-CD16+56+ .nd CD3+CD8+, as well as a reduced content of CD3+ and CD3+CD8+. Inclusion of a :opical form of recombinant interferon-oc2b during the first days of development of the disease .as a systemic effect on cell immunity and results in normalization of subpopulation compoition of blood lymphocytes that is characteristic for physiological course of pregnancy. Conclusion. Administration of topic form of recombinant interferon in pregnant with light or medium severity of ARI can be accompanied by activation of factors of innate and adaptive immunity.

Aim. Control for the population herd immunity against seasonal influenza viruses as well as for emergence of antibodies against influenza with pandemic potential in human blood sera. Materials and methods. HAI reaction against vaccine and epidemic influenza viruses as well as HPAI viruses A/rook/Chany/32/2015 (H5N1) (clade 2.3.2.1c.) andA/Anhui/01/2013 (H7N9). Results. Among all the sera samples collected in the autumn of 2014 and 2015, none had reacted in HAI against A(H5N1) and A(H7N9) antigens even at 1:10 dilution. Among samples collected in autumn 2014, 41% were positive to A/Califorrna/07/09(HlNlpdm09) virus, 36% - A/Texas/50/2012 (H3N2), 40% - B/Brisbane/60/2008 (Vict.lin.) and 47% reacted in HAI against the B/Massachusetts/2/2012 (Yam.lin.) strain. 22% of all the samples had a titer of at least 40 against all the antigens and only 10% in HAI had a titer of 40 or more against all the vaccine strains. Among the samples collected in autumn 2015, the number of seropositive against A/Califorrna/07/09(HlNlpdm09) varied from 31% in the Urals FD to 46% in the Southern FD. The amount of seropositive against A/Switzerland/9715293/13 (H3N2) strain was at the level of 4 - 13% in all the FDs except Urals, where this parameter was slightly above 30%. The amount of seropositive against vaccine influenza В viruses varied from 23 to 76%. Only 2% of sera had titers in HAI of 40 or above against all the vaccine strains, 29% of all the samples were seronegative. Conclusion. Population immunity in Russia against influenza A(H3N2) is at a very low level, thus socially significant consequences of influenza epidemics in many aspects will depend on the vaccination campaign of autumn 2016.

Aim. Evaluate cytokine status in patients with malignant liver cells after surgery. Materials and methods. 33 patients aged 35 to 76 years were included into the study. Blood was obtained before the operation and in the post-operation period: after 6 and 24 hours and at day 7. Cytokine profile (IL-lb, IL-2, TNF-a, IFN-y, IL-12p70, IL-4, IL-5, IL-6, IL-10, IL-13, IL-9, II- 17a, IL-22) was evaluated using Multiplex-13 system (Bender MedSystems, Austria). Results. Inpatients levels of all the studied cytokines (Thl/Th2/Th9/Th 17/Th22) were already increased before the operations, that gives evidence of the presence of an inflammatory process connected with activation ofimmune system effectors. Conclusion. Disbalance of cytokine system helper cells resulting in functional and organic alterations through induction of the “cytokine storm” may aggravate the state of these patients. Further studies on the correction of cytokine system in these patients are thus needed.

Aim. To experimentally define the optimum modes of operation ofthe nonspecific detector IBAC integrated with Cl00 sampler and BioCapture sampler in model experiments during' the work in various environmental conditions and at dispersion of the biological aerosol. Materials and methods. The nonspecific detector IBAC with the C100 sampler and the BioCapture sampler were used for air-monitoring test on existence of pathogenic biological agents (PBA). For preparation of the bioaerosols the strain of Salmonella typhimurium 9640 and a bull seralbumin were used. Results. It is experimentally established that programming of IBAC on turning on the bioalarm system when maintaining concentration of bioaerosol in air above threshold level during 10 sec. is optimum. Its sensitivity makes 1 xlO³ m.c./ml of aerosol at this mode. The possibility of operation of air-monitoring instrumentation in various environmental conditions inside and outside is shown. Conclusion. As a result of the experiment the effectiveness of usage of the nonspecific detector IBAC with the Cl 00 sampler and BioCapture sampler for air-monitoring on existence of PBA is proved. IBAC with C100 can be used as an inventory of the station of air-monitoring during the public events, and BioCapture is suitable for equipment of the groups of epidemiological investigation.

Aim. Evaluate immune status in patients with chronic hepatitis (CH) depending on type of causative agent and severity of the infectious process. Materials and methods. 232 residents of Yakutia including 127 patients with various forms of chronic hepatitis and 105 healthy individuals were examined. Relative levels of mature T-lymphocytes (CD3⁺), T-helpers (CD4⁺), T-suppressors (CD8⁺), B-lymphocytes (CD72⁺) and natural killers (CD16⁺) were studied by flow cytometry, as well as concentration of sera immune globulins of classes A, M and G by ELISA. Results. In patients with chronic hepatitis of various forms, a decrease of expression of differentiating antigens - CD3⁺, CD4⁺, CD72⁺ on the surface of lymphocytes and concentration of sera immune globulins was established. In CHD patients in phase of monoreplication high activity of the infectious process is accompanied by a shift of immune regulatory index to the increase of activity of cytotoxic cells with simultaneous development of deficiency of mature functionally active T-lymphocytes. In the group of patients with hepatitis D virus with liver cirrhosis normal concentration of sera immune globulins is retained against the decrease of the number of T-helpers and B-lymphocytes. Conclusion. In patients with various forms of viral hepatitis acquired immune deficiency can emerge, which is often accompanied by enhancement of NK-cell activity. The noted reduction of the number of mature functionally active T-cells, as well as main classes of sera antibodies could be connected with immune system load during a chronic infectious process.

The detection methods for microbial agents that have epidemiological significance are diversity but cultivation on nutritional media remains the gold standard in microbiological diagnostics. Choice of medium depends on the conditions in which, bacteria were early and is present. The nature life determines its physiological peculiarity then a metabolic plasticity promote to survive and to save the virulence. In. this review on the example of Yersinia pestis and Vibrio cholerae performed evaluations of the efficient decisions for the bacterial media development. It is declared advantage of baker’s yeast hydrolisate as the nutrition media base.

The formation of pro-/eukaryotic systems is the general biological mechanism of formation and variability of the phenotype of plants, animals, human beings under the influence of external Wednesday, i.e. formation of adaptive potency conditions to external Wednesday that increases the «biological status» prokaryotic structures in sustaining body health. Prominent role in the formation of the phenotype of micro media, immunological tolerance (immunological programming), as a basis for the formation of individual pro-/eukaryotic interactions in perinatal age, the dominant role of maternal influence in this process on the one hand, micro-variability due to external stress impact on the other, makes it possible to consider pro-/eukaryotic interaction as a possible mechanism of perinatal programming and epigenetics inheritance and therefore, as one possible approach for correction of chronic and congenital pathology. This points to the need to improve monitoring ofthe formation microbiocenosis of children, improve the methods of assessment and correction.