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  1 / 90 MEDLINE  
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PMID:29247338
Autor:Kemenesi G; Kurucz K; Zana B; Földes F; Urbán P; Vlaschenko A; Kravchenko K; Budinski I; Szodoray-Parádi F; Bücs S; Jére C; Csosz I; Szodoray-Parádi A; Estók P; Görföl T; Boldogh S; Jakab F
Dirección:Virological Research Group, János Szentágothai Research Centre, University of Pécs, Pécs, Hungary. kemenesi.gabor@gmail.com.
Título:Diverse replication-associated protein encoding circular DNA viruses in guano samples of Central-Eastern European bats.
Fuente:Arch Virol; 163(3):671-678, 2018 Mar.
ISSN:1432-8798
País de publicación:Austria
Idioma:eng
Resumen:Circular replication-associated protein encoding single-stranded DNA (CRESS DNA) viruses are increasingly recognized worldwide in a variety of samples. Representative members include well-described veterinary pathogens with worldwide distribution, such as porcine circoviruses or beak and feather disease virus. In addition, numerous novel viruses belonging to the family Circoviridae with unverified pathogenic roles have been discovered in different human samples. Viruses of the family Genomoviridae have also been described as being highly abundant in different faecal and environmental samples, with case reports showing them to be suspected pathogens in human infections. In order to investigate the genetic diversity of these viruses in European bat populations, we tested guano samples from Georgia, Hungary, Romania, Serbia and Ukraine. This resulted in the detection of six novel members of the family Circoviridae and two novel members of the family Genomoviridae. Interestingly, a gemini-like virus, namely niminivirus, which was originally found in raw sewage samples in Nigeria, was also detected in our samples. We analyzed the nucleotide composition of members of the family Circoviridae to determine the possible host origins of these viruses. This study provides the first dataset on CRESS DNA viruses of European bats, and members of several novel viral species were discovered.
Tipo de publicación:JOURNAL ARTICLE
Nombre de substancia:0 (DNA, Single-Stranded); 0 (DNA, Viral)


  2 / 90 MEDLINE  
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PMID:28940019
Autor:Fehér E; Kaszab E; Forró B; Bali K; Marton S; Lengyel G; Bányai K
Dirección:Institute for Veterinary Medical Research, Centre of Agricultural Research, Hungarian Academy of Sciences, P.O. Box 18, 1581, Budapest, Hungary.
Título:Genome sequence of a mallard duck origin cyclovirus, DuACyV-1.
Fuente:Arch Virol; 162(12):3925-3929, 2017 Dec.
ISSN:1432-8798
País de publicación:Austria
Idioma:eng
Resumen:The genome sequence of a novel avian cyclovirus is described in this study. The genome size and orientation of predicted genes was similar to those described in other vertebrate and insect origin cycloviruses. The greatest genome sequence identity was shared with a dragonfly cyclovirus (nt, 60.6%). Phylogenetic analysis showed marginal relatedness with another avian cyclovirus, the chicken associated cyclovirus 1. In contrast, along a short fragment of the replication-associated protein coding gene (rep) (spanning nt 1240-1710) the duck origin cyclovirus was very similar to human origin and honey bee origin rep sequences (human - TN4, 98%; honey bee - hb10, 100%). Related cyclovirus strains existing amongst various animal species living in diverse ecosystems and separated by large geographic distances show the need for additional studies to better understand the ecology and epidemiology of cycloviruses.
Tipo de publicación:JOURNAL ARTICLE


  3 / 90 MEDLINE  
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PMID:28786778
Autor:Breitbart M; Delwart E; Rosario K; Segalés J; Varsani A; Ictv Report Consortium
Dirección:1​College of Marine Science, University of South Florida, 140 7th Avenue South, Saint Petersburg, FL 33701, USA.
Título:ICTV Virus Taxonomy Profile: Circoviridae.
Fuente:J Gen Virol; 98(8):1997-1998, 2017 Aug.
ISSN:1465-2099
País de publicación:England
Idioma:eng
Resumen:The family Circoviridae comprises viruses with small, circular, single-stranded DNA (ssDNA) genomes, including the smallest known animal viruses. Members of this family are classified into two genera, Circovirus and Cyclovirus, which are distinguished by the position of the origin of replication relative to the coding regions and the length of the intergenic regions. Within each genus, the species demarcation threshold is 80 % genome-wide nucleotide sequence identity. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the taxonomy of the Circoviridae, which is available at www.ictv.global/report/circoviridae.
Tipo de publicación:JOURNAL ARTICLE


  4 / 90 MEDLINE  
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PMID:28447216
Autor:Kemenesi G; Kurucz K; Zana B; Tu VT; Görföl T; Estók P; Földes F; Sztancsik K; Urbán P; Fehér E; Jakab F
Dirección:Virological Research Group, Szentágothai Research Centre, University of Pécs, Ifjúság út 20, 7624, Pécs, Hungary.
Título:Highly divergent cyclo-like virus in a great roundleaf bat (Hipposideros armiger) in Vietnam.
Fuente:Arch Virol; 162(8):2403-2407, 2017 Aug.
ISSN:1432-8798
País de publicación:Austria
Idioma:eng
Resumen:Members of the viral family Circoviridae are increasingly recognized worldwide. Bats seem to be natural reservoirs or dietary-related dispensers of these viruses. Here, we report a distantly related member of the genus Cyclovirus detected in the faeces of a great roundleaf bat (Hipposideros armiger). Interestingly, the novel virus lacks a Circoviridae-specific stem-loop structure, although a Geminiviridae-like nonamer sequence was detected in the large intergenic region. Based on these differences and its phylogenetic position, we propose that our new virus represents a distant and highly divergent member of the genus Cyclovirus. However it is lacking several characteristics of members of the genus, which raises a challenge in its taxonomic classification.
Tipo de publicación:JOURNAL ARTICLE
Nombre de substancia:0 (DNA, Intergenic)


  5 / 90 MEDLINE  
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PMID:27115421
Autor:White DJ; Hall RJ; Wang J; Moore NE; Park D; McInnes K; Gartrell BD; Tompkins DM
Dirección:Landcare Research, Private Bag 92170, Auckland Mail Centre, Auckland, New Zealand. whited@landcareresearch.co.nz.
Título:Discovery and complete genome sequence of a novel circovirus-like virus in the endangered rowi kiwi, Apteryx rowi.
Fuente:Virus Genes; 52(5):727-31, 2016 Oct.
ISSN:1572-994X
País de publicación:United States
Idioma:eng
Resumen:Circoviruses are circular, non-enveloped, single-stranded DNA viruses around 2000 nucleotides (nt) in length and include the pathogenic species, Porcine circovirus 1 and Beak and feather disease virus, capable of causing significant morbidity and mortality. This group of viruses may be robust to degradation by external environments, and avian circoviruses are known to move between closely related hosts. Using a de novo metagenomic approach, followed by confirmatory PCR, we identify for the first time a circular Rep-encoding single-stranded (CRESS) DNA virus in New Zealand kiwi, Apteryx spp., derived from faecal matter of the rowi kiwi (A. rowi) showing signs of verminous dermatitis. The entire 2085 nt genome was cloned and sequenced and contains both capsid and replicase genes, as well as a conserved 9 nt motif. Phylogenetic analyses place it within Circoviridae, adjacent to other environmental CRESS-DNA viruses, and most closely related to badger circovirus-like virus (Meles meles circovirus-like virus). As the rowi is the most critically endangered kiwi, it is vital to understand the role of rowi kiwi circovirus-like virus as a possible pathogen and also any potential cross-species transmission.
Tipo de publicación:JOURNAL ARTICLE
Nombre de substancia:0 (Capsid Proteins); 0 (DNA, Single-Stranded); 0 (DNA, Viral)


  6 / 90 MEDLINE  
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PMID:26089292
Autor:Sato G; Kawashima T; Kiuchi M; Tohya Y
Dirección:Laboratory of Veterinary Microbiology, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa, 252-0880, Japan.
Título:Novel cyclovirus detected in the intestinal contents of Taiwan squirrels (Callosciurus erythraeus thaiwanensis).
Fuente:Virus Genes; 51(1):148-51, 2015 Aug.
ISSN:1572-994X
País de publicación:United States
Idioma:eng
Resumen:A novel cyclovirus was identified in the intestinal contents of Taiwan squirrels (Callosciurus erythraeus thaiwanensis) collected in Kanagawa prefecture, Japan, by metagenomic analysis, and was named Taiwan squirrel cyclovirus-1 (TsCyV-1). Phylogenetic analysis showed that TsCyV-1 formed a branch separate from other representative cyclovirus strains. TsCyV-1 is considered to be a new species in the genus Cyclovirus because the criteria for demarcation of cyclovirus species is proposed as nucleotide identities <80 %.
Tipo de publicación:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Nombre de substancia:0 (DNA, Viral)


  7 / 90 MEDLINE  
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PMID:26071341
Autor:Chan MC; Kwok SW; Chan PK
Dirección:Department of Microbiology, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China.
Título:False-positive PCR detection of cyclovirus Malawi strain VS5700009 in human cerebrospinal fluid.
Fuente:J Clin Virol; 68:76-8, 2015 Jul.
ISSN:1873-5967
País de publicación:Netherlands
Idioma:eng
Resumen:BACKGROUND: Cyclovirus (CyCV) Malawi strain VS5700009 has recently been discovered and reported in clinical cerebrospinal fluid (CSF) samples. Further epidemiological and case-control studies are warranted. The availability of a highly sensitive and specific detection assay for this new virus is thus crucial. OBJECTIVES: To evaluate the performance of the first and the only available PCR assay for CyCV-VS5700009. STUDY DESIGN: A total of 100 CSF samples collected during January-December 2010 were selected for PCR detection of CyCV-VS5700009. Positive PCR amplicons were subjected to sequencing confirmation and BLAST analysis. RESULTS: Initial PCR screening for CyCV-VS5700009 identified one sample, showing a PCR band of expected size (380 bp). Sequencing and BLAST analysis, however, indicated that the band was 364 bp in length and showed >99% nucleotide homology to a human gene known as nuclear receptor coactivator 6 (NCOA6). Pairwise sequence alignment confirmed that both the forward and reverse PCR primers used had significant homology (>70%) to NCOA6. None of the CSF samples tested were positive for CyCV-VS5700009. CONCLUSIONS: The original PCR assay for CyCV-VS5700009 detection may have potential cross-reactivity with contaminating human genomic DNA. The assay may be of little diagnostic use on clinical specimens that are rich in host DNA such as biopsy tissues.
Tipo de publicación:EVALUATION STUDIES; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T


  8 / 90 MEDLINE  
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PMID:25841004
Autor:Reavy B; Swanson MM; Cock PJ; Dawson L; Freitag TE; Singh BK; Torrance L; Mushegian AR; Taliansky M
Dirección:The James Hutton Institute, Dundee, Scotland, United Kingdom Brian.Reavy2@gmail.com Michael.Taliansky@hutton.ac.uk.
Título:Distinct circular single-stranded DNA viruses exist in different soil types.
Fuente:Appl Environ Microbiol; 81(12):3934-45, 2015 Jun 15.
ISSN:1098-5336
País de publicación:United States
Idioma:eng
Resumen:The potential dependence of virus populations on soil types was examined by electron microscopy, and the total abundance of virus particles in four soil types was similar to that previously observed in soil samples. The four soil types examined differed in the relative abundances of four morphological groups of viruses. Machair, a unique type of coastal soil in western Scotland and Ireland, differed from the others tested in having a higher proportion of tailed bacteriophages. The other soils examined contained predominantly spherical and thin filamentous virus particles, but the Machair soil had a more even distribution of the virus types. As the first step in looking at differences in populations in detail, virus sequences from Machair and brown earth (agricultural pasture) soils were examined by metagenomic sequencing after enriching for circular Rep-encoding single-stranded DNA (ssDNA) (CRESS-DNA) virus genomes. Sequences from the family Microviridae (icosahedral viruses mainly infecting bacteria) of CRESS-DNA viruses were predominant in both soils. Phylogenetic analysis of Microviridae major coat protein sequences from the Machair viruses showed that they spanned most of the diversity of the subfamily Gokushovirinae, whose members mainly infect obligate intracellular parasites. The brown earth soil had a higher proportion of sequences that matched the morphologically similar family Circoviridae in BLAST searches. However, analysis of putative replicase proteins that were similar to those of viruses in the Circoviridae showed that they are a novel clade of Circoviridae-related CRESS-DNA viruses distinct from known Circoviridae genera. Different soils have substantially different taxonomic biodiversities even within ssDNA viruses, which may be driven by physicochemical factors.
Tipo de publicación:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Nombre de substancia:0 (Capsid Proteins); 0 (DNA, Single-Stranded); 0 (DNA, Viral); 0 (Soil)


  9 / 90 MEDLINE  
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PMID:25839169
Autor:Phan TG; Mori D; Deng X; Rajindrajith S; Ranawaka U; Fan Ng TF; Bucardo-Rivera F; Orlandi P; Ahmed K; Delwart E
Dirección:Blood Systems Research Institute, San Francisco, CA 94118, USA; Department of Laboratory Medicine, University of California at San Francisco, San Francisco, CA 94118, USA.
Título:Small circular single stranded DNA viral genomes in unexplained cases of human encephalitis, diarrhea, and in untreated sewage.
Fuente:Virology; 482:98-104, 2015 Aug.
ISSN:1096-0341
País de publicación:United States
Idioma:eng
Resumen:Viruses with small circular ssDNA genomes encoding a replication initiator protein can infect a wide range of eukaryotic organisms ranging from mammals to fungi. The genomes of two such viruses, a cyclovirus (CyCV-SL) and gemycircularvirus (GemyCV-SL) were detected by deep sequencing of the cerebrospinal fluids of Sri Lankan patients with unexplained encephalitis. One and three out of 201 CSF samples (1.5%) from unexplained encephalitis patients tested by PCR were CyCV-SL and GemyCV-SL DNA positive respectively. Nucleotide similarity searches of pre-existing metagenomics datasets revealed closely related genomes in feces from unexplained cases of diarrhea from Nicaragua and Brazil and in untreated sewage from Nepal. Whether the tropism of the cyclovirus and gemycircularvirus reported here include humans or other cellular sources in or on the human body remains to be determined.
Tipo de publicación:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, NON-U.S. GOV'T
Nombre de substancia:0 (DNA, Circular); 0 (DNA, Single-Stranded); 0 (Sewage)


  10 / 90 MEDLINE  
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Roehe, Paulo Michel
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PMID:25688970
Autor:Lima FE; Cibulski SP; Dos Santos HF; Teixeira TF; Varela AP; Roehe PM; Delwart E; Franco AC
Dirección:Virology Laboratory, Department of Microbiology, Immunology and Parasitology, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Rio Grande do Sul (RS), Brazil.
Título:Genomic characterization of novel circular ssDNA viruses from insectivorous bats in Southern Brazil.
Fuente:PLoS One; 10(2):e0118070, 2015.
ISSN:1932-6203
País de publicación:United States
Idioma:eng
Resumen:Circoviruses are highly prevalent porcine and avian pathogens. In recent years, novel circular ssDNA genomes have recently been detected in a variety of fecal and environmental samples using deep sequencing approaches. In this study the identification of genomes of novel circoviruses and cycloviruses in feces of insectivorous bats is reported. Pan-reactive primers were used targeting the conserved rep region of circoviruses and cycloviruses to screen DNA bat fecal samples. Using this approach, partial rep sequences were detected which formed five phylogenetic groups distributed among the Circovirus and the recently proposed Cyclovirus genera of the Circoviridae. Further analysis using inverse PCR and Sanger sequencing led to the characterization of four new putative members of the family Circoviridae with genome size ranging from 1,608 to 1,790 nt, two inversely arranged ORFs, and canonical nonamer sequences atop a stem loop.
Tipo de publicación:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
Nombre de substancia:0 (DNA, Single-Stranded)



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