Publications by authors named "Anna Dolgova"

An endosymbiotic bacterium of the genus , designated as strain HZ, was cultured from the parasitoid wasp , which develops on the pupae of various host flies. The bacterium was detected in developed on houseflies, , in a poultry facility in Hazon, northern Israel. After culturing, this bacterium displayed no surface motility on Luria-Bertani agar and was rod-shaped and irregular in size, ~10-30 nm in diameter and 5-20 µm in length.

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The widespread use of the oral poliovaccine from Sabin strains (tOPV) radically reduced poliomyelitis incidence worldwide. However, OPV became a source of neurovirulent vaccine-derived polioviruses (VDPVs). Currently, circulating type 2 VDPVs (cVDPV2) are the leading cause of poliomyelitis.

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Article Synopsis
  • - Dugbe virus (DUGV), a tick-borne virus first identified in Nigeria in 1964, has been found in several African countries and was notably detected in Senegal during the 1970s and 1980s.
  • - Recent research detected three new DUGV isolates from 2877 ticks collected in the Kolda region of Senegal, indicating continued viral presence and potential unnoticed transmission in the area.
  • - Phylogenetic analysis shows these new isolates are related to earlier DUGV strains in West Africa, and the study established a cost-effective method for full-genome sequencing using nanopore technology, revealing a low mutation rate and stable evolution of the virus.
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The data presented in this paper characterize stable kaolinite edge surfaces. Their equilibrium structure is obtained by DFT methods using the first-principles package CASTEP. The calculations are performed using a basis set of plane waves in the PBE exchange-correlation potential.

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Article Synopsis
  • - The study investigated the presence of Crimean-Congo haemorrhagic fever virus (CCHFV) in ticks across various locations in Senegal, collecting samples from cattle, sheep, and goats in July 2021.
  • - A total of 6135 ticks from 11 species were identified, with a high infestation rate of 92% in cattle, while CCHFV was detected in ticks, particularly from sheep, revealing a higher infection rate than those from cattle.
  • - The findings confirm ongoing CCHFV circulation in Senegal’s tick populations and stress the need for effective measures to control tick infestations in livestock to reduce the risk of human infections.
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Bunyamwera virus is the prototype of the Bunyamwera serogroup, which belongs to the order of the genus in the Peribunyaviridae family. Bunyamwera is a negative-sense RNA virus composed of three segments S, M, and L. Genetic recombination is possible between members of this order as it is already documented.

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Article Synopsis
  • * The study introduces a new bacteriophage called vB_KpnP_Klyazma, which was isolated from river water and shows lytic activity against certain bacterial strains with a specific capsule type.
  • * A key finding is that the phage's receptor-binding protein, a polysaccharide depolymerase, can modify bacterial capsular polysaccharides, opening potential uses in antimicrobial therapy even if it doesn't kill bacteria directly.
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Being diverse and widely distributed globally, bats are a known reservoir of a series of emerging zoonotic viruses. We studied fecal viromes of twenty-six bats captured in 2015 in the Moscow Region and found 13 of 26 (50%) samples to be coronavirus positive. Of (the Nathusius' pipistrelle), 3 of 6 samples were carriers of a novel MERS-related betacoronavirus.

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Nipah virus (NiV) is a zoonotic RNA virus which infects humans and animals in Asian countries. Infection in humans occurs in different forms, from asymptomatic infection to fatal encephalitis, and death occurred in 40-70% of those infected in outbreaks that occurred between 1998 and 2018. Modern diagnostics is carried out by real-time PCR to identify pathogens or by ELISA to detect antibodies.

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Current serological tests for the emerging tick-borne pathogen Borrelia miyamotoi lack diagnostic accuracy. To improve serodiagnosis, we investigated a protein array simultaneously screening for IgM and IgG reactivity against multiple recombinant B. miyamotoi antigens.

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Following its emergence at the end of 2021, the Omicron SARS-CoV-2 variant rapidly spread around the world and became a dominant variant of concern (VOC). The appearance of the new strain provoked a new pandemic wave with record incidence rates. Here, we analyze the dissemination dynamics of Omicron strains in Saint Petersburg, Russia's second largest city.

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The Bunyamwera serological group includes a number of geographically widespread viruses that are related but not identical and have serological cross-reactivity. As the first group members were obtained in the pre-sequencing era, their classifications (group attribution, species differentiation) were originally based on serological reactions. At the same time, the accuracy of the typing in each case depended on the variety of viruses that the researcher had as a comparison panel.

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In this report, we present new data on the diversity and geographical distribution of genetic variants in Crimean-Congo hemorrhagic fever virus (CCHFV) in Russia. Partial S, M, and L segment sequences of the CCHFV genome were obtained from 500 serum samples from CCHF patients and 103 pools of ticks collected in the south of the European region of Russia in 2007-2017. The investigated viral strains belonged to the lineages Europe 1 (596 samples), Africa 3 (1 sample) and a new genetic lineage, Europe 3 (6 samples).

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The COVID-19 pandemic, which began in Wuhan (Hubei, China), has been ongoing for about a year and a half. An unprecedented number of people around the world have been infected with SARS-CoV-2, the etiological agent of COVID-19. Despite the fact that the mortality rate for COVID-19 is relatively low, the total number of deaths has currently already reached more than three million and continues to increase due to high incidence.

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Wad Medani virus (WMV) belongs to the genus Orbivirus and is a poorly studied arbovirus with unclear medical significance. Presently, a limited number of WMV strains are characterized and available in NCBI GenBank, some isolated many years ago. A new WMV strain was isolated in 2012 from Dermacentor nuttalli ticks collected from sheep in the Tuva Republic, Russia, and sequenced using high-throughput methods.

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Coronavirus disease 2019 (COVID-19) has become pandemic since March 11, 2020. Thus, development and integration in clinics of fast and sensitive diagnostic tools are essential. The aim of the study is a development and evaluation of a one-step quantitative reverse transcription-polymerase chain reaction (RT-qPCR) assay (COVID-19 Amp) for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) detection with an armored positive control and internal controls constructed from synthetic MS2-phage-based RNA particles.

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This chapter reports a library preparation protocol for efficient high-throughput sequencing of double-stranded RNA viruses. The protocol consists of four main steps, viz., enzyme treatment, precipitation using lithium chloride, full-length amplification of cDNAs, and tailing adapters for high-throughput sequencing.

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The inclusion of special regulatory sequences known as matrix attachment regions (MARs) in transgene constructs has been suggested as a possible approach to stabilise the expression of foreign heterological genes. The present review provides a brief summary regarding the MARs that have been used in investigations studying their influence on plant transgene expression in different plants with different promoters and reporter genes, and the comparison of these investigations.

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Paramushir virus belongs to Sakhalin virus genogroup within Orthonairovirus genus and is one of the poorly studied viruses with unknown pathogenicity. At the moment, only one nearly complete sequence of Paramushir virus genome, isolated in 1972, is available. Two new strains of PARV were isolated in 2015 from a sample collected at the Tyuleniy Island in the Okhotsk Sea and sequenced using a combination of high throughput sequencing and specific multiplex PCR.

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Aim: Estimation of specific IgE is essential for the prevention of allergy progression. Quantitative immuno-PCR (qiPCR) can increase the sensitivity of IgE detection. We aimed to develop qiPCR and compare it to the conventional ELISA in identification of IgE to Alt a 1 and Fel d 1 allergens.

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We aimed to determine the profile of IgE reactivity to three major cat allergens, Fel d 1, Fel d 2 and Fel d 4, in cat-allergic patients in the Moscow region in Russia. sIgE levels to recombinant proteins expressed in Escherichia coli (Fel d 1 and Fel d 4) and to Fel d 2 protein purified from cat serum were measured using a microarray method developed in our laboratory. Sera from 174 anonymous subjects with a positive reaction (≥0.

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