virus structure and classification ppt

virus structure and classification ppt

virus structure and classification ppt

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The pathogenic significance of this virus has not been established. However, a seventh class was added to accommodate the gapped DNA genome of Hepadnaviridae (hepatitis B virus). 16. So they are also called as obligate intracellular parasites. The chandipura virus, belonging to the genus Vesiculovirus of family Rhabdoviridae was isolated in Nagpur (INDIA) in 1967. Type member: Tobacco necrosis virus A strain. Classification of Viruses Are Virus's Living Things? kingdom Meaning of Viruses: Virus is a Latin word which means poison. Structure 4. The vectors are sandflies and Aedes mosquitoes, in which the virus multiplies. All pro- Baltimore classification sorts Rabies virus and HIV-1 into two different groups, indicating that the two viruses have very different life cycles. Filed under Allergy and Immunology. Classification of Microorganisms A. Capsid : The protein coat that surrounds nucleic acid. Viruses have no . Tobacco necrosis virus. Virus Definition. The Adobe Flash plugin is needed to view this content. Structure and Classification of Animal Viruses. Classification of virus on the basis of mode of transmission: 1. Meaning and History of Viruses: Viruses (Latin Venum – poisonous fluid) are simplest forms of life. nucleus, no . classification and nomenclature of viruses. A virus is an infectious agent made up of nucleic acid (DNA or RNA) wrapped in a protein coat called a capsid.. PPT – VIRUS STRUCTURE PowerPoint presentation | free to view - id: b9a64-ZDc1Z. Viral particles (virions) are generally enveloped (external enveloped […] Alfred Pasieka/Science Photo Library/Getty Images. Nature of Viruses 3. However, genome structure classification does not distinguish between the two viruses. (B-2) Cross-section view of the same viruses. Published on 18/02/2015 by admin. Displaying Powerpoint Presentation on Structure and Classification of Animal Viruses available to view or download. VIRUS STRUCTURE AND CLASSIFICATION. Adolf Mayer described for the first time a disease of tobacco plant. Dimitri Ivanowski, a Russian botanist in 1892 demonstrated experimentally that sap […] […] Virion : The complete infectious virus particle. Virus transmitted through respiratory route: Eg, Swine flu, Rhino virus; 2. The smooth running of the organization was due to the Secretaries, Drs J. MATJRIN, J. BRANDES and V. VALENTA. Virus classification by genome structure and core: The type of genetic material (DNA or RNA) and its structure (single- or double-stranded, linear or circular, and segmented or non-segmented) are used to classify the virus core structures. About 5 percent of the length of the virion is depicted. Viral Structure, Classification, and Replication. Prerequisite is knowledge of the basic composition of the virus, i.e. Virus: Structure and Symmetry. 15. The Baltimore Classification System initially included six classes of viruses. It requires a host cell to replicate itself and uses the host cell replication and protein synthesis machinery to create progeny of its own. This is why it does NOT belong to any . Virus classification is very important for virus research. Infection may be recognized via outward signs PPT. Last modified 18/02/2015. Viruses are extremely small, approximately 20 - 400 nanometers in diameter. vs. defined the following terms:. Bacteria 1 m m. 0.015 m m = 15 nm. Virus Anatomy and Structure . The genome structure system classifies both viruses as single-stranded RNA viruses with linear genomes. Print this page. Structure. Principles of Classification and Nomenclature ... II. They are not cells, but their study has provided a great deal of information about cells. (A) Flexuous thread-like virus. Meaning and History of Viruses 2. A virus is a chain of nucleic acids (DNA or RNA) which lives in a host cell, uses parts of the cellular machinery to reproduce, and releases the replicated nucleic acid chains to infect more cells. Structure of Influenza virus Influenza virion are usually spherical (diameter 80-110 nm). ADVERTISEMENTS: In this article we will discuss about Viruses:- 1. Structure of the virus particle FIGURE: Relative shapes, sizes, and structures of some representative plant viruses. Traditionally, virus classification relied on properties such as virion morphology, genome organization, replication mechanism, serology, natural host … Baculovirus, Sacbrood virus, Entomopox virus, Granulosis virus . 2.1 – Taxonomic Classification The helical structure of the rigid tobacco mosaic virus rod. The greatest drawback of this classification is that only the well-studied viruses have been placed in the above mentioned 16 groups and many little known viruses have been left. Type member: Tomato spotted wilt virus. Virus are very small infectious agents with size ranging from 20-300nm in diameter. Eg. ADVERTISEMENTS: In this article we will discuss about the structure and replication of pox viruses. Viruses can be classified primarily on their phenotypic characteristics, core content, chemical composition, capsid structure, size, shape, genome structure and modes of replication. Sponsored Links. Classification. 17.17). There are many different types of viruses, and many ways of classifying these. What are the properties of viruses? Traditionally, viruses are named after the most conspicuous symptom they produce on the first host. The LibreTexts libraries are Powered by MindTouch ® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Sizes and Shapes of Viruses 3. 2. A virus causing mosaic on tobacco is called Tobacco mosaic virus, whereas the disease itself is called as tobacco mosaic. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. 1. Eukaryotic cell 10 m m. VIRUS PARTICLES ARE BUILT BY AN ASSEMBLY … Viruses can also be classified by the design of their capsids. Meaning of Viruses 2. VIRUS STRUCTURE AND CLASSIFICATION. In 1962, Caspar et al. organelles, no . C. Prokaryotic Organisms Prokaryotic Kingdoms Kingdom Eubacteria Kingdom Archaeobacteria II. 4. Rotavirus is an acute infection that can have lethal consequences if left untreated. Nucleocapsid : The nucleic acid plus the capsid. or cell membrane— Non-cellular. Virus lacks their own independent metabolism and cannot replicate outside the host cell. # NA is a target of the antiviral drugs Tamiflu ADVERTISEMENTS: In this article we will discuss about Viruses:- 1. They are not classified as living organisms because they do not have a cellular structure. The external surface is ridged in parallel rows, sometimes arranged helically (Fig. “Average” Virus 0.1 m m= 100 nm. I should like especially to thank ... (vertebrate virus, plant virus, invertebrate virus and bacte}ophage). Virus Structure: A virus is an infectious non-living particle that cannot survive on its own.It is considered to be non-living because it cannot exist purely by itself. It is also an extremely difficult task for many virus families. Claude MUVUNYI M.D., Ph.D. Terminology. cytoplasm. (B-1) Side arrangement of protein subunits (PS) and nucleic acid (NA) in viruses A and B. ... • May undergo reassortment among genomic segments, yielding new virus strains, particularly in influenza viruses. ; An enveloped virus, the outer layer is a lipid membrane which is taken from the host cell. Insect virus: Virus that infects insects. Virus transmitted through faeco-oral route: Eg. – A free PowerPoint PPT presentation (displayed as a Flash slide show) on PowerShow.com - id: 6ec0e5-N2I0M Smallest virus. Nomenclature and Classification of Plant Viruses. Virus Structure and Classification - Visualization is usually with an electron microscope ... icosahedron regular, solid shape that … Classification. They are very small. This article describes the structure and classification of the virus. (B) Rigid rod-shaped virus. The Baltimore classification is the most commonly used for studying the system of virus classification. Virus Classification. A virus particle, also known as a virion, is essentially nucleic acid (DNA or RNA) enclosed within a protein shell or coat. ; Inserted into the lipid membrane are ‘spikes’, about 10 nm long, which are glycoproteins, known as HA (hemagglutinin), and NA (neuraminidase). Viruses are non-cellular entities so they are also called as particles. Classification, morphology and structure, Replication and Pathogenicity •Classification of Viruses •morphology and structure •Naked viruses( Non Enveloped ) ... •5 basic types of virus structure: •Stable in hostile environment •Released by lysis of host cells •Examples: –Adeno-associated Virus (AAV) –Adenovirus B19 . Hepatitis A virus, Polio virus, Rota virus; 3. Download Structure and Classification of Animal Viruses … Structure of Pox Viruses: Oval or brick-shaped 200-400 nm long particles can be visualized by the best light microscopes. Tomato spotted wilt virus. A virus is often housed in a protein coat or protein envelope, a protective covering which allows the virus to survive between hosts. Structure of the Virus The viral structure of hepatitis B is similar in many ways to other viruses. Pea enation mosaic virus. The Baltimore system of virus classification devised by virologist & Nobel laureate David Baltimore is based on the genomic nature of the viruses. 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