Varicella Zoster Virus

Varicella Zoster Virus

Varicella Zoster Virus Structure of Varicella Zoster Virus Image Source: Creative Diagnostics Varicella-zoster virus (VZV) is an alphaherpesvirus that is in the same subfamily as herpes simplex virus (HSV) 1 and 2. VZV is a member of varicellovirus genus. The virion is spherical in shape with icosahedral symmetry measuring 159-200nm. The icosahedral protein capsid with … Read moreVaricella Zoster Virus

Oncogenic Viruses

Oncogenic Viruses

Oncogenic Viruses Viruses are the intracellular pathogens that reproduce only in the living cell and manipulate the cellular machinery to produce more viruses. Viral replications can affect cellular genes of the host in multiple cancerous ways. An oncovirus is a virus that can cause cancer. Viruses account for about 20% of total human cancer cases. Although many viruses can cause … Read moreOncogenic Viruses

Classification of virus

Baltimore Classification

Classification of virus Viruses are small obligate intracellular parasites, which by definition contain either a RNA or DNA genome surrounded by a protective, virus-coded protein coat. Viruses range from the structurally simple and small parvoviruses and picornaviruses to the large and complex poxviruses and herpesviruses. Viruses are classified on the basis of morphology, chemical composition, … Read moreClassification of virus

Virus Cultivation- Purposes and Methods

Virus Cultivation- Purposes and Methods

Virus Cultivation- Purposes and Methods Viruses are obligate intracellular parasites so they depend on host for their survival. They cannot be grown in non-living culture media or on agar plates alone, they must require living cells to support their replication. The primary purposes of virus cultivation is: To isolate and identify viruses in clinical samples. … Read moreVirus Cultivation- Purposes and Methods

Mumps Virus

Mumps Virus

Mumps Virus Structure of Mumps Virus Mumps virions are markedly pleomorphic (100 to 600 nm), and roughly spherical with an outer membrane that envelops an inner, coiled helical structure. The envelope which is 150 to 300nm is studded with projections formed by the viral glycoproteins that rise 12 to 15 nm from the virion surface. … Read moreMumps Virus

Hanta Virus

Hanta Virus

Hanta Virus Structure of Hanta Virus Source: Viral Zone Hanta virus falls under the Bunyaviridae family. The virion displays round or pleomorphic morphology with a diameter of roughly 120-160 nm. The virus capsid is enveloped by a single layer envelope. The envelope surrounds three nucleocapsids and has surface projections. Surface projections are distinctive spikes which are … Read moreHanta Virus

Herpes simplex virus 1 (HSV-1)

Herpes simplex virus 1 (HSV-1)

Herpes simplex virus 1 (HSV-1) Structure of Herpes simplex virus 1 (HSV-1) Herpesviruses are large (150-200 nm size), spherical in shape with icosahedral symmetry. The icosahedral protein capsid with average diameter 100 nm consists of 162 hollow hexagonal and pentagonal capsomeres with an electron-dense core containing the double stranded DNA genome with 125-240 kbp nucleotides … Read moreHerpes simplex virus 1 (HSV-1)

Influenza A Virus

Influenza A Virus

Influenza A Virus Structure of Influenza A Virus Influenza A virus falls under the family Orthomyxoviridae. Influenza A virus particles are usually spherical and about 80- 120 nm in diameter. It is an enveloped virus and the envelope contains two glycoproteins, hemagglutinin (HA) and neuraminidase (NA), the membrane (M2) protein and is internally lined by the … Read moreInfluenza A Virus

Polio Virus

Polio Virus

Polio Virus Structure of Polio Virus Poliovirus is a member of a family of viruses called the Picornaviridae. Virions are spherical in shape with a diameter of about 27nm. The particles are simple in that they are composed of a protein shell surrounding the naked RNA genome. The genome is monopartite, linear ssRNA(+) genome of 7.2-8.5 kb, … Read morePolio Virus

Japanese Encephalitis (JE) Virus

Japanese Encephalitis (JE) Virus

Japanese Encephalitis (JE) Virus Structure of Japanese Encephalitis (JE) Virus Japanese encephalitis (JE) virus falls under the family Flaviviridae. The particles appear to be spherical, 50 nm in diameter, containing an electron dense core (about 30 nm diameter) surrounded by a lipid bilayer. Mature virions sediment between 170 and 210S, have a buoyant density of 1.19 … Read moreJapanese Encephalitis (JE) Virus