[Time-specific infection rate of Beauveria bassiana on Myzus persicae after topical inoculation of conidial suspension].

Conidial suspension(5 x 10(6) conidia.ml-1) of the entomopathogenic fungus, Beauveria bassiana BBSG8702 was used to inoculate newly emerged apterous adults of the green peach aphid (Myzus persicae) on detached cabbage leaves in order to measure time-specific infection rate of the fungal agent. The aphids of conidia attached were disinfected using 0.

[Evaluation of the hydrophobicity of bacterial cells by measuring their adherence to chloroform drops].

A simple method for measuring the hydrophobicity of bacterial cells is proposed, which is based on the spectrophotometric evaluation of cell adherence to chloroform drops in a biphasic water-chloroform mixture.

[Evaluation of the effectiveness of antibacterial substances in treating an experimental form of bubonic plague in monkeys].

The modelling of glandular plague and selection of the conditions for estimating the efficacy of new antibacterials for the treatment of the infection were performed on hamadryads (baboons). The experiments showed that the average LD50 of the culture of a highly virulent strain of Yersinia pestis on its subcutaneous administration to the animals was 2089 viable microbes. In 18 per cent of the episodes the experimental glandular plague in the animals was complicated by secondary plague pneumonia.

[Identification of hypervariable and conservative fragments of Listeria genome].

The computer analysis revealed hypervariable and highly conservative fractions in the genes of Gram-positive bacteria of the Listeria genus. As a result of analysis of gene iap coding protein p60, PCR based test systems for detection of 6 Listeria species, L. monocytogenes, L.

[Optional growth medium and conditions for mass production of Pandora delphacis mycelia in submerged culture].

The entomophthoraceous fungi are important microbial control agents for insect control but their mass production is usually difficult and expensive. To produce in large quantity the mycelia of the entomophthoraceous fungus, Pandora delphacis (isolate F95129), this study was aimed at replacing expensive components of liquid medium that is usually used in laboratory only with cheap materials easily available. Based on comparative experiments with primary components of several media designed and optional conditions for submerged culture, an appropriate medium was recognized that included(per liter) 10 g of homemade yeast extract, 10 g industrial fish meal, 10 g wheat bran, 15 g corn meal, 1.

[Diagnostic and epidemiological significance of F-donor activity of Enterobacteria strains].

The study of the circulating strains of enteropathogenic Escherichia coli (EPEC), shigellae and salmonellae for the presence of F-factor (the conjunction factor) was carried out. The study revealed that 85% of Shigella flexneri strains 2a had conjugative (F)-factor. The proportion of such strains was 63% among EPEC of different serovars and 15% among Salmonella enteritidis.

[Taxonomy and classification of Rickettsiae].

During the recent 20 years the improvement of the methodological research basis including the molecular and genetic analysis of microorganisms parasites of eukaryotic cells, led to considerable changes in the taxonomy and classification of rickettsiae. This problem was not discussed in the Russian literature. At present the term "rickettsiae" conventionally embraces the group of microorganisms of the class Proteobacteria, nominated as species belonging to the genera Rickettsia, Orientia, Ehrlichia, Coxiella and Bartonella.

[The use of liposomal form of phenylimide of cis-aconitic acid in herpes therapy].

The results of study of the antiviral activity and pharmacokinetics of phenylimide of cis-aconitic acid (PCAA) is presented. The 20% increase of the antiviral activity of PCAA incorporated into liposomes in comparison with the antiviral activity of the pure substance was shown. Liposomes with PCAA were tropic to lymphocytes and macrophages with maximum fluorescence being observed in the spleen, while empty liposomes were accumulated mainly in the liver.

[Use of poly-beta-oxybutyric acid by Yersinia pseudotuberculosis and Listeria monocytegenes bacteria at various temperatures].

A comparative investigation of the intracellular content of poly-beta-hydroxybutyric acid showed that Yersinia pseudotuberculosis strains accumulated, on the average, lower amounts of this reserve substance than Listeria monocytogenes strains. The intracellular pool of poly-beta-hydroxybutyric acid was responsible for the growth of the bacteria at low temperatures (4-6 degrees C) in the absence of any exogenous carbon and energy source.

[The results of a 5-year study of listeriosis in Ukraine].

Data on the isolation of Listeria spp. cultures on the territory of Ukraine, the frequency of Listeria contamination of alimentary raw materials and foodstuffs, the level of listeriosis morbidity, the clinical forms of the manifestation of this disease, as well as the occurrence of asymptomatic carriership among clinically healthy persons of epidemiologically significant professions, are given. The results of the study of the biological properties of 73 strains of Listeria spp.

[Listeria bacterial carriage: a method for sanative treatment].

1.6% of clinically healthy women active in certain professions have been found to be carriers of pathogenic species of Listeria. The study of the sensitivity of 73 strains of Listeria spp.

[Role of free radical oxidation processes in the pathogenesis of infectious diseases].

Recent literature data on the mechanisms responsible for oxidative stress at infectious diseases and methods of their correction are reviewed.

[The properties of Pragia fontium bacteria isolated on the territories of Ukraine and the Czech Republic].

The results are presented of the study of the properties (morphological, tinctorial, cultural, biochemical) and primary DNA structure of 28 Pragia fontium strains, 18 of which were isolated in the territory of Ukraine and 10 in the territory of Czechia. The scheme of differentiation of genera Pragia, Budvicia and Leminorella is presented. The GC (guanine + cysteine) content of DNA is 47 +/- 1.

[The immunological efficacy of one, two and three inoculations against diphtheria in adults].

The outbreak of diphtheria in the Republic of Belarus developed in the presence of a sharp deficiency of immunity among the population aged 35 years and over. In connection with a higher initial immunity level resulting from vaccination made in one injection the minimum antibody level (> or = 0.01 I.

[Microbial cenoses of the nasopharynx].

The review is devoted to nasopharyngeal microflora, its significance for macroorganisms, and to relations between main representatives of nasopharyngeal microbial associations.

[A modification to the method for determining the antilysozyme activity of meningococcal strains].

A method of determination of antilysozyme activity in the meningococcus strains has been suggested which consisted in preparing the meningococcus strains culture suspension in liquid media with different lysozyme concentration, incubation of mixtures for some time at 37 degrees C determination of residual lysozyme contents with the use of highly sensitive gel bacterial medium.

[The possible role of immunogenetic factors in the pathogenesis of HIV infection].

In this review the data on the presence of associations between immunogenetic markers and the development of HIV infection are presented. Special attention is given to spatial relationships of genetic determinants, responsible for the synthesis of the components of the complement system on one hand and the genes controlling resistance to the causative agents of opportunistic infections and malignant growth on the other hand. Suggestion is made on close relationship between the specific features of the course of HIV infection and the genetic control, responsible for the synthesis of complement components, in particular the genes making up the HLA system.