Olga V Usacheva

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The locations of amino acid positions relevant to antigenic variation in the nucleoprotein (NP) of influenza virus are not conclusively known. We analysed the antigenic structure of influenza A virus NP by introducing site-specific mutations at amino acid positions presumed to be relevant for the differentiation of strain differences by anti-NP monoclonal(More)
The influence of the historical exploitiation and recovery of biological resources on populations of freshwater pearl mussel and salmon was studied in the Kozha river (Onega River Basin). The freshwater pearl mussel was characterized by a low population density (0.09 ind./m2, on the average) and number of recruits. The role of the anthropogenic factor in(More)
The paper presents the results of interpreting the epizootic outbreak etiologically associated with high-virulent influenza virus A/H5N1 among domestic and wild birds in the Zernogradsky and Tselinsky districts of the Rostov Region. Epizooty was characterized by a high infection rate in the synanthropic birds of a ground-based complex. RT-PCT revealed(More)
The F gene fragment of 79 Newcastle disease virus (NDV) strains isolated from domestic and synanthropic birds in Kazakhstan, Kirghizia, Ukraine, and Russia in 1993 to 2007 was comparatively analyzed. Phylogenetic analysis of test isolates and reference NDV strains obtained from the GenBank was carried out by polymerase chain reaction with subsequent(More)
Among agricultural birds in the near-Moscow Region (February 2007), local epizootics caused by the highly pathogenic avian influenza A/H5N1 virus seem to be of unintended manual origin. Such a situation may be considered to be model when the source of inoculation is elucidated in cases of potentially possible acts of bioterrorism. Molecular genetic analysis(More)
AIMS In the area of bioaerosol research, rapid methods for precise detection attracted much interest over last decades. One of such technologies operating in nearly real-time mode without any specific labelling is known as surface plasmon resonance (SPR). Recently, we validated a SPR protocol in conjunction with our earlier developed personal bioaerosol(More)
The main differences in the structure and species diversity of topical groups of mollusks between lakes on Solovetsky Island and continental lakes have been revealed. Insular groups are characterized by higher indices of species richness (the average number of species per sample) and density, with the level of dominance being decreased. In general, specific(More)
AIMS Rapid and precise bioaerosol detection in different environments has become an important research and technological issue over last decades. Previously, we employed a real-time PCR protocol in conjunction with personal bioaerosol sampler for rapid detection of airborne viruses. The approach has been proved to be specific and sensitive. However, a(More)
180 Water bodies of the North are characterized by a comparatively poor and at the same time rather vari able food resources. Because of the instability of envi ronmental factors and limitedness of the vegetative season, aquatic ecosystems cannot provide food requirements of fish by a single species or a group of feeds during a year. As a rule, this leads(More)
AIMS A portable bioaerosol monitor is greatly demanded technology in many areas including air quality control, occupational exposure assessment and health risk evaluation, environmental studies and, especially, in defence and bio-terrorism applications. Our recent groundwork allowed us to formulate the concept of a portable bioaerosol monitor, which needs(More)