• dsRNA viruses
  • Unlike the assembly pathway that has been described for reoviruses and other larger dsRNA viruses, PsV-F and PsV-S assembly is likely to proceed from dimers of CP dimers, each of which adopts a striking, smooth-edged diamond shape (Figure 7D). (ictvonline.org)
  • virion
  • The bottle-shaped morphology is unprecedented among viruses of bacteria and eukaryotes and represents a group of archaea-specific virion morphotypes. (ictvonline.org)
  • The virion of Acidianus bottle shaped virus (ABV) is enveloped, resembles in its shape a bottle and has an overall length of about 230 nm and a width varying from about 75 nm, at the broad end, to 4 nm, at the pointed end (Figure 1 .Ampullaviridae ). (ictvonline.org)
  • The virus particle, called Dane particle (virion), consists of an outer lipid envelope and an icosahedral nucleocapsid core composed of protein. (wikipedia.org)
  • The virus is one of the smallest enveloped animal viruses with a virion diameter of 42 nm, but pleomorphic forms exist, including filamentous and spherical bodies lacking a core. (wikipedia.org)
  • genera
  • These viruses can be subdivided into two genera: lymphocryptoviruses (gamma-1) and rhadinoviruses (gamma-2): Murid herpesvirus 68 is an important model system for the study of gammaherpesviruses with tractable genetics. (wikipedia.org)
  • OFV causes necrotic and chlorotic lesions on the leaves of many genera in the family Orchidaceae Orchid Fleck Virus, despite its presence worldwide, only affects a small spectrum of human life. (wikipedia.org)
  • Thogotovirus is a genus of enveloped RNA viruses, one of seven genera in the virus family Orthomyxoviridae. (wikipedia.org)
  • species of the genus
  • ERBV's appear to infect most foals and weanlings, eliciting a low serum antibody response in stark contrast to equine rhinitis A virus (ERAV), which is the only species of the genus Aphthovirus that is not a foot-and-mouth disease virus (FMDV), and appears to only infect horses once they begin training for racing (approx. (wikipedia.org)
  • infect humans
  • The family Herpesviridae, which contains eight viruses that infect humans, is the most extensively studied group within this order and comprises three subfamilies, namely Alphaherpesvirinae, Betaherpesvirinae and Gammaherpesvirinae. (wikipedia.org)
  • THOV, DHOV and Bourbon virus can infect humans, and have occasionally been associated with human disease. (wikipedia.org)
  • Vaccines
  • Surprisingly, latency-deficient and, therefore, apathogenic MHV-68 mutants are found to be highly effective vaccines against these viruses. (wikipedia.org)
  • This is one reason why it is difficult to make effective vaccines to prevent diseases caused by RNA viruses. (wikipedia.org)
  • particles
  • The encapsidation signal is usually located within the ORF encoding the MP [{Wilson and McNicol 1995:7487499RJOHTXWilson and McNicol 1995, A conserved, precise RNA encapsidation pattern in Tobamovirus particles, Arch Virol, 140, 9, 1677-85}] or within the ORF encoding the CP in the studied isolates of Cucumber green mottle mosaic virus and Sunn hemp mosaic virus . (ictvonline.org)
  • In 1984 particles resembling these viruses were discovered in the faeces of humans. (wikipedia.org)
  • While not inside an infected cell or in the process of infecting a cell, viruses exist in the form of independent particles. (wikipedia.org)
  • The shapes of these virus particles range from simple helical and icosahedral forms for some virus species to more complex structures for others. (wikipedia.org)
  • isolates
  • Virus names, the choice of exemplar isolates, and virus abbreviations, are not official ICTV designations. (ictvonline.org)
  • Similarly, striking genetic similarities were shown between perch rhabdoviruses and isolates from other European countries and various ecological niches, most likely reflecting the circulation of viruses through fish trade as well as putative transfers from marine to freshwater fish. (deepdyve.com)
  • One such phylogenetic group was found to comprise mostly "acid stable" virus isolates, surviving pH 3.6 for 1 hour at room temperature. (wikipedia.org)
  • bacteria
  • Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea. (wikipedia.org)
  • The origins of viruses in the evolutionary history of life are unclear: some may have evolved from plasmids-pieces of DNA that can move between cells-while others may have evolved from bacteria. (wikipedia.org)
  • icosahedral
  • The capsid of Penicillium chrysogenum virus (PcV) comprises 60 copies of a 109 kDa polypeptide (982-aa) arranged on a T=1 icosahedral lattice (Figure 1. (ictvonline.org)
  • Group: ssRNA(+) Order: Picornavirales Family: Picornaviridae Genus: Erbovirus Erbovirus A Viruses in Erbovirus are non-enveloped, with icosahedral, spherical, and round geometries, and T=pseudo3 symmetry. (wikipedia.org)
  • protein
  • Transmission is believed to be by contact with the blood and body fluids of those infected with the virus, as well as by handling raw bushmeat such as bats and monkeys, which are important sources of protein in West Africa. (wikipedia.org)
  • genetic
  • The analysis revealed a genetic cluster containing only fish viruses, including all rhabdoviruses from perch, as well as siniperca chuatsi rhabdovirus (SCRV) and eel virus X (EVEX). (deepdyve.com)
  • The new genetic data provided in the present study shed light on the diversity of rhabdoviruses infecting perch in France and support the hypothesis of circulation of these viruses between other hosts and regions within Europe. (deepdyve.com)
  • A DNA virus is a virus that has DNA as its genetic material and replicates using a DNA-dependent DNA polymerase. (wikipedia.org)
  • An RNA virus is a virus that has RNA (ribonucleic acid) as its genetic material. (wikipedia.org)
  • In evolution, viruses are an important means of horizontal gene transfer, which increases genetic diversity. (wikipedia.org)
  • Viruses are considered by some to be a life form, because they carry genetic material, reproduce, and evolve through natural selection, but lack key characteristics (such as cell structure) that are generally considered necessary to count as life. (wikipedia.org)
  • Ebola
  • An Ebola virus epidemic in Sierra Leone occurred in 2014, along with the neighbouring countries of Guinea and Liberia. (wikipedia.org)
  • It was identified as Ebola virus disease and spread to Sierra Leone by May 2014. (wikipedia.org)
  • At the time it was discovered, it was thought that Ebola virus is not endemic to Sierra Leone or to the West Africa region and this epidemic represents the first time the virus has been discovered there. (wikipedia.org)
  • However, some samples taken for Lassa fever testing turned out to be Ebola virus disease when re-tested for Ebola in 2014, showing that Ebola had been in Sierra Leone as early as 2006. (wikipedia.org)
  • In 2014 it was discovered that samples of suspected Lassa fever showed evidence of the Zaire strain of Ebola virus in Sierra Leone as early as 2006. (wikipedia.org)
  • Even after a successful recovery from an Ebola infection, semen may contain the virus for at least two months. (wikipedia.org)
  • This may aid the transmission of Ebola, because those that die from Ebola disease are thought to have high concentrations of the virus in their body, even after they have died. (wikipedia.org)
  • For the 2001 outbreak of Sudan virus in Uganda, attending a funeral of an Ebola victim was rated by the CDC as one of the top three risk factors for contracting Ebola, along with contact with a family member with Ebola or providing medical care to someone with a case of Ebola virus disease. (wikipedia.org)
  • humans
  • Members of this group include the rotaviruses, renowned globally as the most common cause of gastroenteritis in young children, and picobirnaviruses, renowned worldwide as the most commonly occurring virus in fecal samples of both humans and animals with or without signs of diarrhea. (wikipedia.org)
  • However, the virus has different symptoms in humans. (wikipedia.org)
  • equine
  • The type (and only) species of the Erbovirus genus is Equine rhinitis B virus which was recently found to have three phylogenetically distinct serotypes, equine rhinitis B virus (ERBV)-1, ERBV-2 and ERBV-3. (wikipedia.org)
  • endemic
  • The virus is considered endemic in tropical and subtropical countries of Asia, and Africa, as well as Mexico, but antibody prevalence studies suggest a global distribution for this virus. (ictvonline.org)
  • Penicillium
  • The structures of Penicillium stoloniferum viruses F and S (PsV-F and PsV-S) have been determined by X-ray crystallography (PsV-F) and electron cryomicroscopy (PsV-F and PsV-S) [{Ochoa et al. (ictvonline.org)
  • tobacco mosai
  • Since Dmitri Ivanovsky's 1892 article describing a non-bacterial pathogen infecting tobacco plants, and the discovery of the tobacco mosaic virus by Martinus Beijerinck in 1898, about 5,000 virus species have been described in detail, although there are millions of types. (wikipedia.org)
  • In 1892, the Russian biologist Dmitri Ivanovsky used this filter to study what is now known as the tobacco mosaic virus. (wikipedia.org)
  • host
  • The virus attaches to the host cell lipopolysaccharides using its terminal fibers, and ejects the viral DNA into the host cytoplasm via contraction of its tail sheath. (wikipedia.org)
  • The virus attaches to the host cell adhesion receptors using its tail fibers, and ejects the viral DNA into the host periplasm via short tail system. (wikipedia.org)
  • Entry into the host cell is achieved by attachment of the virus to host receptors, which mediates endocytosis. (wikipedia.org)
  • The virus exits the host cell by lysis, and viroporins. (wikipedia.org)
  • Bats are known to be carriers of at least 90 different viruses that can make transition to a human host. (wikipedia.org)