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  • ICTV
  • In the second ICTV report in 1976 this genus was elevated to family level - the Herpetoviridae. (wikipedia.org)
  • The trees from our analyses are in good agreement to the latest classification of large dsDNA viruses and parvoviruses by the International Committee on Taxonomy of Viruses (ICTV). (biomedcentral.com)
  • The International Committee on the Taxonomy of Viruses (ICTV) publishes a report on the virus taxonomy system every five years. (biomedcentral.com)
  • According to the VIIIth Report of the International Committee on Taxonomy of Viruses (ICTV) [ 20 ], the dsDNA viruses can be classified into certain families or unassigned genus. (biomedcentral.com)
  • Since 1971, the International Committee on Taxonomy of Viruses (ICTV) operating on behalf of the world community of virologists has taken on the task of developing a single, universal taxonomic scheme for all viruses infecting animals (vertebrate, invertebrates, and protozoa), plants (higher plants and algae), fungi, bacteria, and archaea. (indigo.ca)
  • dsDNA viruses
  • The Herpesvirales is an order of dsDNA viruses with eukaryotic hosts and enveloped virions, characterized by a common morphology. (wikipedia.org)
  • In this paper, the DL method is used to analyze the whole-proteome phylogeny of 124 large dsDNA viruses and 30 parvoviruses, two data sets with large difference in genome size. (biomedcentral.com)
  • The present method provides a new way for recovering the phylogeny of large dsDNA viruses and parvoviruses, and also some insights on the affiliation of a number of unclassified viruses. (biomedcentral.com)
  • In comparison, some alignment-free methods such as the CV Tree method can be used for recovering the phylogeny of large dsDNA viruses, but they are not suitable for resolving the phylogeny of parvoviruses with a much smaller genome size. (biomedcentral.com)
  • The present study represents another effort of applying an alignment-free method in analysing complete genome data to elucidate the phylogeny of two virus groups of different genome size, the large dsDNA viruses and parvoviruses. (biomedcentral.com)
  • The genome sizes of dsDNA viruses are usually larger than 10 kb except those in the families Polyomaviridae (5 kb) and Papillomaviridae (7-8 kb). (biomedcentral.com)
  • These are the only known dsDNA viruses that infect plants. (wikipedia.org)
  • strains
  • Artificial insemination is not believed to be a transmission factor, notes that when multiple calves of a single bull or cow elephant died at different times (even at the same facility) they nearly all had distinct strains of the virus, yet when two calves died or became infected at the same time at the same facility the pairs have always had identical virus strains. (wikipedia.org)
  • classification
  • Ablashi's pioneering research concluded by suggesting that the virus name be changed from HBLV to HHV-6, in accord with the published provisional classification of herpes viruses. (wikipedia.org)
  • The practical need to partition the world of viruses into distinguishable, universally agreed upon entities is the ultimate justification for developing a virus classification system. (indigo.ca)
  • DNA viruses belong to either Group I or Group II of the Baltimore classification system for viruses. (wikipedia.org)
  • Although Group VII viruses such as hepatitis B contain a DNA genome, they are not considered DNA viruses according to the Baltimore classification, but rather reverse transcribing viruses because they replicate through an RNA intermediate. (wikipedia.org)
  • infection
  • It is postulated that following natural infection with EBV, the virus executes some or all of its repertoire of gene expression programs to establish a persistent infection. (wikidoc.org)
  • Antibodies to the virus are rare among monkeys in the wild but the infection spreads rapidly when they are brought together in captivity. (rrnursingschool.biz)
  • These viruses tend to cause tumors when infection occurs outside of their native hosts or in the case of KSHV, in humans when the host is immunosuppressed due to AIDS, old age, or in the setting of organ transplantation. (wikipedia.org)
  • Because EHV-4 infection can be asymptomatic, the presence of the virus does not confirm that it was the cause of the observed clinical signs. (wikipedia.org)
  • Oral hairy leukoplakia (OHL) is caused by the Epstein-Barr virus (EBV), which has been related to HIV infection. (pubfacts.com)
  • Diseases
  • Reactivation of latent viruses has been implicated in a number of diseases (e.g. (wikipedia.org)
  • Notable diseases like smallpox, herpes, and the chickenpox are caused by such DNA viruses. (wikipedia.org)
  • Gammaherpesviruses are of primary interest due to the two human viruses, EBV and KSHV and the diseases they cause.The gammaherpesviruses replicate and persist in lymphoid cells but some are capable of undergoing lytic replication in epithelial or fibroblast cells. (wikipedia.org)
  • lymphocytes
  • Given the initial absence of host immunity , the lytic cycle produces large amounts of virus to infect other (presumably) B-lymphocytes within the host. (wikidoc.org)
  • The latent programs reprogram and subvert infected B-lymphocytes to proliferate and bring infected cells to the sites at which the virus presumably persists. (wikidoc.org)
  • Viruses that establish lifelong latent infections must ensure that the viral genome is maintained within the latently infected cell throughout the life of the host, yet at the same time must also be capable of avoiding elimination by the immune surveillance system especially must avoid being detected by host CD8+ cytotoxic T lymphocytes (CTLs). (wikipedia.org)
  • genome
  • On infecting the B-lymphocyte, the linear virus genome circularizes and the virus subsequently persists within the cell as an episome. (wikidoc.org)
  • The EBNA-1 protein is essential for maintenance of the virus genome . (wikidoc.org)
  • Due to the problems caused by the uncertainty in alignment, existing tools for phylogenetic analysis based on multiple alignment could not be directly applied to the whole-genome comparison and phylogenomic studies of viruses. (biomedcentral.com)
  • On the other hand, the genome sizes of ssDNA viruses are smaller than 10 kb. (biomedcentral.com)
  • Bacteriophages (viruses infecting bacteria) belonging to the families Tectiviridae and Corticoviridae have a lipid bilayer membrane inside the icosahedral protein capsid and the membrane surrounds the genome. (wikipedia.org)
  • rhesus
  • BV) occurs naturally in macaques of the genus Macaca, which includes rhesus and long-tailed (cynomolgus) monkeys that are widely used in biomedical research. (hindawi.com)
  • Genes
  • Eventually, when host immunity develops, the virus persists by turning off most (or possibly all) of its genes, only occasionally reactivating to produce fresh virions. (wikidoc.org)
  • Virus Genes. (wikipedia.org)
  • They are large double-stranded viruses that possess up to 100 genes in a single long chromosome, which is flanked by repetitive DNA sequences called terminal repeats. (wikipedia.org)
  • latent
  • The virus can execute many distinct programs of gene expression which can be broadly categorized as being lytic cycle or latent cycle. (wikidoc.org)
  • More than 90% of adults have been infected with at least one of these, and a latent form of the virus remains in most people. (wikipedia.org)
  • The virus can remain latent in recovered animals - shedding at times of stress, allowing the spread of disease to others. (wikipedia.org)
  • human
  • It is 35 to 45% homologous to the human Epstein-Barr virus. (wikipedia.org)
  • During maturation of HHV-6 virions, human cell membranes are used to form viral lipid envelopes (as is characteristic of all enveloped viruses). (wikipedia.org)
  • Virus replicates with CPE in vervet monkey kidney cell cultures, also in human thyroid , Vero cells and many other cell lines. (rrnursingschool.biz)
  • Thus HR1, HR2, HR3 for human retroviruses 1, 2 and 3 is appropriate and does not prejudice the likelihood that HR1 and HR2 will end up in one genus of one subfamily whereas HR3 may end up in a different subfamily and genus. (nih.gov)
  • Oral lesions associated with human immunodeficiency virus in 75 adult patients: a clinical study. (pubfacts.com)
  • The objective of this study was to investigate the presence of oral lesions in human immunodeficiency virus/acquired immunodeficiency syndrome (HIV/AIDS) patients in a descriptive cross-sectional study, and to establish their presence according to levels of CD4+ cells (including the CD4+/CD8+ cell ratio). (pubfacts.com)
  • infects
  • Distribution is worldwide and the virus infects a range of ruminants, including bison, buffalo, sheep and goats. (wikipedia.org)
  • diagnosis
  • Diagnosis is achieved by virus isolation (from tissues or secretions), PCR, ELISA, and indirect immunofluorescence. (wikipedia.org)