structure and multiplication of virus slideshare

This is the principle of plaque assay. Viruses are smaller than bacteria and they are filterable. Difference Between Bacteria & Virus 4. The entire infectious virus particle, called a virion, consists of the nucleic acid and an outer shell of protein. Structure of Tobacco Mosaic Virus (TMV): TMV is a simple rod-shaped helical virus (Fig. Home; Entertainment; Movies; Music; Party; Contact us; Home Uncategorized structure of coronavirus slideshare Viruses do not have any capacity for locomotion, and so the collision event is simply a random process determined by diffusion. Filoviridae are from the order Mononegavirales, include Ebola virus (EBOV), Marburg virus (MARV) and Cuevavirus [1, 2], which are single-stranded, negative-sense RNA viruses that exhibit unique heterogeneous filamentous structure.Filovirus was first reported and named Marburg virus in 1967 during an outbreak of viral haemorrhagic fever (HF) in Frankfurt (Germany) … Small virions are simple nucleocapsids containing 1 to 2 protein species. A bacteriophage, or phage for short, is a virus that infects bacteria. 14. Viral Structure: Envelope a) Non-enveloped viruses/ Naked Viruses = viruses whose capsids are not covered by an envelope b) Sometimes, Capsid covered with envelope • SPIKES = carbohydrate-protein complexes (glycoproteins) that project from the envelope • Can be used to attach to host cell 15. Movies core magazine- Immerse into the movie world. Virus multiplication in 3-D. Three-dimensional structure of a vaccinia virus RNA polymerase at atomic resolution. Bacteriophage, also called phage or bacterial virus, any of a group of viruses that infect bacteria.Bacteriophages were discovered independently by Frederick W. Twort in Great Britain (1915) and Félix d’Hérelle in France (1917). Start studying Multiplication of Viruses. Learn vocabulary, terms, and more with flashcards, games, and other study tools. A prerequisite for this interaction is a collision between the virion and the cell. On SlideShare. 0. Progress of Viral Multiplication • Once a virus infects its host and the viral progeny components are produced by the host's cellular machinery, the assembly of the viral capsid is a non- enzymatic process. It is usually spontaneous. Viruses typically can only infect a limited number of hosts (also known as host range). The first step in every viral infection is the attachment or adsorption of the infecting particle to the surface of the cell. Th is genome is a single-stranded, non-segmented RNA virus with the largest known virus multiplication cycle elizabeth p. quiles, m.d., fpasmap department of microbiology our lady of fatima university college of medicine Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 4.Synthesis: The culture conditions must be known for virus that is used to study. 0 Number of Embeds. Start studying Micro-Ch.5 VIRAL STRUCTURE AND MULTIPLICATION (CONNECT). conformational structure occurs in the structure and the process of entry into the virus cell begins [35,36]. sexual contact with infected person (even if … 13.20) consisting of centrally located single- stranded RNA (5.6%) enveloped by a protein coat (94.4%). 523 Comments. It assembles heterogenous, filamentous, enveloped virus particles containing a negative-sense, single-stranded RNA genome packaged within a helical nucleocapsid (NC). Multiplication of Viroids. One plaque is formed from one virus on the monolayer. 6 Actions. Biological Classification - Biology is a subject of natural science that involves the study of living organisms. Viruses: Their Structure and Replication 2. Virus Core Structure. Structure of Viruses. Ultrafiltration. The shape of the capsid may vary from one type of virus to another. VIRUS MULTIPLICATION (DNA Virus) • DNA: Cellular enzyme transcribes viral DNA in nucleus Parungao-Balolong 2011Thursday, January 26, 2012 86. The helical nature of this virus is quite clear in negative staining electron micrographs since the virus forms a rigid rod-like structure. Max Delbruck (1938) numbered coliphages as T-even phages (T2, T4, T6 etc.) 0 From Embeds. Plaque assay is used to count only viruses that are capable of multiplying. and T-odd phages (T1, T3, T5 etc.). Structure of viruses – It consist of Capsid , nucleic acid and envelop. A virus is a small parasite that cannot reproduce by itself. The subject is divided into various fields such as the evolution, growth, d Virus structure 1. 0 From Embeds. - Viral specificity refers to the specific kinds of cells a virus … Abstract. Multiplication … Start studying Microbiology - Chapter 5 - Viral structure and Multiplication. –Structure –Classification –Multiplication –Cultivation and replication –Nonviral infectious agent –Teratogenic/Oncogenic - Viruses have a host range. Size of Viruses. 2 There are two major structures of viruses called the naked nucleocapsid virus and the enveloped virus NAKED Enveloped Capsid •Protective outer shell that surrounds viral nucleic acid •Composed of capsomer subunits - collectively protect the nucleic acid from the environment •Capsid spikes - used for binding to cell surface proteins Envelope 12 Actions. 1. D’Hérelle coined the term bacteriophage, meaning “bacteria eater,” to describe the agent’s bacteriocidal ability. The first viroid to be identified was the Potato spindle Tuber Viroid (PsTVd). F. Twort (1915) and F. d ‘Herelle (1917) independently discovered bacteriophages. About 5 percent of the length of the virion is depicted. Aft er entering the cytoplasm, the virus particle releases the RNA genome. Phage genomes can consist of either DNA or RNA, and can contain as few as four genes or as many as several hundred. ... • Uncoated influenza virus genomes are transported to the nucleus for transcription and genome replication ... • Viruses can disrupt cell membrane biosynthesis and structure The nucleic acid may be single- or double-stranded. The presence in serum of hepatitis B e antigen (HBeAg) and hepatitis B virus DNA, which are each regarded as reflecting multiplication of hepatitis B virus, were looked for one to five days after the onset of hepatic encephalopathy in 64 patients with fulminant hepatitis B. HBeAg and hepatitis B virus DNA were found in the serum of only 24 (37%) and six (9%) patients, respectively. ADVERTISEMENTS: Bacteriophages, in short, are the viruses that infect bacteria. Size of virus is measured by using. Stages in Multiplication Soon after interaction with the host cell Virion is disrupted infectivity is lost ECLIPSE PERIOD The yield of infectious virus per cell ranges from moderate numbers to > 100,000 particles The duration of replication cycle … Th is process with endocytosis is dependant of pH through the receptor [37-40]. A bacteriophage is a virus that infects bacteria. Incubation of virus requires time. 29 No notes for slide. VIRUS STRUCTURE • ASHISH RANGHANI • PG PART 2 • GDCH, AHMEDABAD UNDER GUIDANCE OF DR. J.S SHAH PROFESSOR AND HEAD ORAL MEDICINE AND RADIOLOGY GDCH DATE- 27/07/2016 2. Ebola virus is a highly pathogenic filovirus causing severe hemorrhagic fever with high mortality rates. ADSORPTION. Structure of Viroids. Ch 13_lecture_presentation kevperrino. CONTENTS 1. That is, viruses infect specific cells or tissues of specific hosts, or specific bacteria, or specific plants. Except in helical nucleocapsids, little is known about the packaging or organization of the viral genome within the core. Discovery of Viroids: Viroids were first discovered and given this name by Theodor Otto Diener (1971), a plant pathologist working at Agricultural Research Centre in Maryland. Most viruses have either RNA or DNA as their genetic material. Size of viruses ranges from 20 nm to 300 nm. 1 OUTLINE/OBJECTIVES Structure Types of virus of virus Multiplication of animal virus Bacteriophages and retrovirus 2 VIRAL ... morph/structure human papilloma virus. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 1.Adsorption: - The process of adhering one molecule onto the surface of another molecule. Difference Between DNA & RNA Virus 5. Introduction to Virology I: Viral Structure and Function I. Background/Discovery The concept behind modern virology can be traced back to Adolf Mayer, Dimitri Ivanofsky and Martinus Beijerinck who, independently in the late 1880’s, discovered what was later to be called tobacco mosaic virus … 1. 0 Number of Embeds. Bacteriophages attacking Escherichia coli are called coliphages or T-phages. Viruses: • Defination: • An infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host. The helical structure of the rigid tobacco mosaic virus rod. 1. Downloads. Viruses vary in their structure. The rod is considered to be 3,000 Å in length and about 180 Å in … Electron Microscopy. Shares. A virus particle consists of DNA or RNA within a protective protein coat called a capsid. The family Rhabdoviridae consists of more than 100 single-stranded, negative-sense, nonsegmented viruses that infect a wide variety of hosts, including vertebrates, invertebrates, and plants. Search. The virus particle, called Dane particle (), consists of an outer lipid envelope and an icosahedral nucleocapsid core composed of protein.The nucleocapsid encloses the viral DNA and a DNA polymerase that has reverse transcriptase activity similar to retroviruses. INTRODUCTION. Also Read: Cytopathic Effect Viruses are tiny and smaller in its size, ranging 8 - Virus Structure Multiplication 1. On SlideShare. VIRUS MULTIPLICATION : (+ strand RNA Virus) •RNA, + strand:Viral RNA is a template for synthesis of RNA polymerase. Structure of virus, Bacteriophage and Multiplication of Bacterial viruses Viruses are minute parasitic, ultramicroscopic disease producing organism with dimensions of less than 200 mili microns. History of virology 2. Definition 3. Viruses are noncellular genetic elements that use a living cell for their replication and have an extracellular state. Bacteriophages Freelance clinical Microbiologist . These viruses cause several infections and reproduce within the host cell by using the enzymes and raw materials. Viruses can be classified primarily on their phenotypic characteristics, core content, chemical composition, capsid structure, size, shape, genome structure and modes of replication. benefit of complement proteins. Structure: ADVERTISEMENTS: The virion of For viruses to … Viral Structure and Replication. influenza virus , rabies virus ), the capsid is more flexible (and longer) and appears in negative stains rather like a telephone cord (figure 4H, I). Rotavirus-Classification, Structure composition and Properties, Replication, Mode of Transmission, Pathogenesis, Clinical symptoms, laboratory diagnosis, Treatment, Prevention and Control May 21, 2017 Gaurab Karki Virology 1 The capsid is made from the proteins that are encoded by viral genes within their genome. Learn vocabulary, terms, and more with flashcards, games, and other study tools. mode of trans human papilloma virus. Once it infects a susceptible cell, however, a virus can direct the cell machinery to produce more viruses. Shares. Downloads. Samples with very low virus counts use this method. 22 ... 8 - Virus Structure Multiplication Rachel Belton. 0. Viruses are ultramicroscopic particles containing nucleic acid surrounded by protein, and in some cases, other macromolecular components such as a membranelike envelope. 2.Penetration: - Step in viral multiplication in which virus enters the host cell. Ultracentrifugation. The Virus 2. 0 Likes. DS DNA no envelope. View virus structure.pptx from NURS 335 at Valley View University. Hepatitis B virus is a member of the Hepadnavirus family. Credit: Clemens Grimm. Viruses, structure, classification and characteristics 1. 148 Comments. In enveloped, helically symmetrical viruses (e.g. 0 Likes. Like other types of viruses, bacteriophages vary a lot in their shape and genetic material. Common to all members of the family is a distinctive rod- or bullet-shaped morphology. prevents multiplication of virus impedes nutrition of virus (iron) increases metabolism and stimulates immune response of host. 3.Uncoating: - Process of removal of the viral coat and release of the viral genome by it's new invaded host cell.

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