Fenner and White's Medical Virology
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Physicochemical Properties of Double-Stranded RNA Used to Discover a Reo-Like Virus from Blue Crab Callinectes Sapidus
Vol. 93: 17–29, 2010 DISEASES OF AQUATIC ORGANISMS Published December 7 doi: 10.3354/dao02280 Dis Aquat Org OPENPEN ACCESSCCESS Physicochemical properties of double-stranded RNA used to discover a reo-like virus from blue crab Callinectes sapidus Holly A. Bowers1, Gretchen A. Messick2, Ammar Hanif1, Rosemary Jagus1, Lee Carrion3, Oded Zmora4, Eric J. Schott1,* 1Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science, Baltimore, Maryland 21202, USA 2Center for Coastal Environmental Health & Biomolecular Research at Charleston USDOC/NOAA/NOS/NCCOS, Oxford, Maryland 21654, USA 3Coveside Crabs, Inc., Dundalk, Maryland 21222, USA 4Institute of Marine and Environmental Technology, University of Maryland Baltimore County, Baltimore, Maryland 21202, USA ABSTRACT: Mortality among blue crab Callinectes sapidus in soft shell production facilities is typi- cally 25% or greater. The harvest, handling, and husbandry practices of soft shell crab production have the potential to spread or exacerbate infectious crab diseases. To investigate the possible role of viruses in soft shell crab mortalities, we took advantage of the physicochemical properties of double- stranded RNA (dsRNA) to isolate a putative virus genome. Further characterization confirmed the presence of a reo-like virus that possesses 12 dsRNA genome segments. The virus was present in >50% of dead or dying soft shell crabs, but fewer than 5% of healthy hard crabs. Injection of the virus caused mortality and resulted in the appearance of viral RNA and virus inclusions in hemocytes. The genome of the virus was partially sequenced and the information used to develop a reverse transcrip- tion polymerase chain reaction (RT-PCR) assay that is able to detect the virus genome in as little as 7.5 pg of total RNA. -
Mgr. Marie Vilánková
www.novinky.cz www.rozhlas.cz VIRY Mgr. Marie Vilánková © ECC s.r.o. www.stefajir.cz Všechna práva vyhrazena Viry • Jejich zařazení do živé přírody • Virus jako informace • Jejich členění, • způsoby pronikání do lidského organismu, • nejčastější zdravotní problémy s nimi spojené • Možnosti řešení, včetně akutních infekcí, preparáty Joalis • Proč preparát Antivex je velmi důležitý © ECC s.r.o. Všechna práva vyhrazena Země • Životní prostředí – živé organismy - rostliny, živočichové… – tvořeny buňkami • Rostliny – počátek potravního řetězce, umí zachytávat sluneční energii a ukládat do chemických vazeb • Zvířata – zdroj potravy – rostliny nebo jiná zvířata • Houby a plísně – rozklad hmoty na základní prvky • Bakterie – také rozklad, velký význam v oběhu živin, prospěšné svazky s jinými organismy, mohou také škodit - Různé vztahy mezi organismy – boj o potravu, získání životního prostoru, přežití… © ECC s.r.o. Všechna práva vyhrazena Živé organismy • Živé organismy tvořeny buňkami – jednobuněčné (bakterie, prvoci, některé plísně), vícebuněčné • Buňka – tvořena ze specializovaných částí organel - cytoplasma, jádro, mitochondrie, endoplasmatické retikulum … • Buněčná membrána: dvojitá vrstva fosfolipidů s molekulami bílkovin – velmi důležité NENAsycené mastné kyseliny – VÝŽIVA!!! • Každá buňka – samostatný organismus – přijímá potravu, vylučuje, rozmnožuje se, reaguje na okolí, má nějakou fci -stavební produkuje stavební materiál (bílkoviny), transportní bariérová – přenáší částice přes bariéru, pohybová – natahuje a smršťuje se, signalizační © ECC s.r.o. Všechna práva vyhrazena Organismus = společnost buněk Soubor buněk = základní funkční jednotka • Propojeny pojivem – mezibuněčná hmota – produkt buněk vazivo, chrupavky, kosti, tekutiny • Tkáně: soubor buněk stejného typu (nervová, svalová, epitel...) • Orgány: skládají se z tkání, tvoří soustavy orgánů • Tělo: je složeno z buněk – 3,5 x 1013 buněk (lidí na Zemi 109) • Délka těla= 1,7 m, průměrná velikost buňky 10 - 20 mikrometru, měřítko 10-6 - člověk se dívá na svět z družice © ECC s.r.o. -
Marine Surface Microlayer As a Source of Enteric Viruses
MARINE SURFACE MICROLAYER AS A SOURCE OF ENTERIC VIRUSES Ana Catarina Bispo Prata Tese de Doutoramento em Ciências do Mar e do Ambiente 2014 Ana Catarina Bispo Prata MARINE SURFACE MICROLAYER AS A SOURCE OF ENTERIC VIRUSES Tese de Candidatura ao grau de Doutor em Ciências do Mar e do Ambiente Especialidade em Oceanografia e Ecossistemas Marinhos submetida ao Instituto de Ciências Biomédicas de Abel Salazar da Universidade do Porto. Programa Doutoral da Universidade do Porto (Instituto de Ciências Biomédicas de Abel Salazar e Faculdade de Ciências) e da Universidade de Aveiro. Orientador – Doutor Adelaide Almeida Categoria – Professora Auxiliar Afiliação – Departamento de Biologia da Universidade de Aveiro Co-orientador – Doutor Newton Carlos Marcial Gomes Categoria – Investigador Principal do CESAM Afiliação – Departamento de Biologia da Universidade de Aveiro LEGAL DETAILS In compliance with what is stated in the legislation in vigor, it is hereby declared that the author of this thesis participated in the creation and execution of the experimental work leading to the results here stated, as well as in their interpretation and writing of the respective manuscripts. This thesis includes one scientific paper published in an international journal and three articles in preparation originated from part of the results obtained in the experimental work referenced as: • Prata C, Ribeiro A, Cunha A , Gomes NCM, Almeida A, 2012, Ultracentrifugation as a direct method to concentrate viruses in environmental waters: virus-like particles enumeration as a new approach to determine the efficiency of recovery, Journal of Environmental Monitoring, 14 (1), 64-70. • Prata C, Cunha A, Gomes N, Almeida A, Surface Microlayer as a source of health relevant enteric viruses in Ria de Aveiro. -
Molecular Characterization of 52K Protein of Bovine Adenovirus Type 3
MOLECULAR CHARACTERIZATION OF 52K PROTEIN OF BOVINE ADENOVIRUS TYPE 3 A Thesis Submitted to the Faculty of Graduate Studies and Research in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Department of Veterinary Microbiology University of Saskatchewan Saskatoon By Carolyn Patricia Paterson © Copyright Carolyn P. Paterson, August 2010. All rights reserved. PERMISSION TO USE In presenting this thesis in partial fulfillment of the requirements for a postgraduate degree from the University of Saskatchewan, I agree that the libraries of this university may make it freely available for inspection. I further agree that permission for copying of this thesis in any manner, whole or in part, for scholarly purposes may be granted by the professors who supervised my thesis work or in their absence, the Head of the Department or the Dean of the college in which my thesis work was done. It is understood that any copying or publication or use of this thesis or parts therof for financial gain shall not be allowed without any written permission. It is also understood that due recognition shall be given to me and to the University of Saskatchewan in any scholarly use which may be made of any material in my thesis. Request for permission to copy or to make other use of material in this thesis in whole or part should be addressed to: Head of the Department of Veterinary Microbiology University of Saskatchewan Saskatoon, Saskatchewan, S7N 5B4 i ABSTRACT Bovine adenovirus (BAdV)-3 is a non-enveloped, icosahedral virus with a double-stranded DNA genome, and is being developed as a vector for vaccination of animals and humans (Rasmussen et al., 1999; Zakhartchouk et al., 1999). -
Reflections ...Gordon
Reflections . Gordon Ada Life as a Biochemist Coming to Grips with Viruses Foreword It must be hard for recent graduates in many biological disciplines to appreciate what the frontiers of our knowledge were 50 years ago. The author majored in Biochemistry at the University of Sydney during the war and in 1948, joined the staff of the Walter and Eliza Hall Institute (WEHI) officially to help establish new biophysical techniques (moving boundary electrophoresis and ultracentrifugation), but spent most of the time doing research on virus-related topics. Macfarlane Burnet, a famous virologist, had become the Director of the Institute in 1942. This account describes some of the relevant biochemical findings made during the period 1948-60. Discovering the Secrets of the Influenza Virus The 1918-19 influenza pandemic killed at least 20 million people, more than the combined casualties of the two World Wars. Burnet, part way through his medical course at Melbourne University when it reached Australia, fortunately suffered only a mild infection, but the global and local effects remained a strong memory. On becoming Director of WEHI, and concerned that a similar pandemic might soon occur, he decided to make a determined effort to understand how the influenza virus infected and replicated inside cells and caused disease. Virtually all non-clinical scientists in the Institute were to become involved in this task. When I arrived in 1948, there were two other biochemists - Henry Holden, who earlier had achieved fame in the UK in elucidating the structure of haemoglobin, and Alfred Gottschalk (see Box 1), a carbohydrate specialist, who had escaped from Nazi Germany and joined the Institute in 1942. -
Diversity and Classification of Reoviruses in Crustaceans: a Proposal
Journal of Invertebrate Pathology 182 (2021) 107568 Contents lists available at ScienceDirect Journal of Invertebrate Pathology journal homepage: www.elsevier.com/locate/jip Diversity and classification of reoviruses in crustaceans: A proposal Mingli Zhao a, Camila Prestes dos Santos Tavares b, Eric J. Schott c,* a Institute of Marine and Environmental Technology, University of Maryland, Baltimore County, Baltimore, MD 21202, USA b Integrated Group of Aquaculture and Environmental Studies, Federal University of Parana,´ Rua dos Funcionarios´ 1540, Curitiba, PR 80035-050, Brazil c Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science, Baltimore, MD 21202, USA ARTICLE INFO ABSTRACT Keywords: A variety of reoviruses have been described in crustacean hosts, including shrimp, crayfish,prawn, and especially P virus in crabs. However, only one genus of crustacean reovirus - Cardoreovirus - has been formally recognized by ICTV CsRV1 (International Committee on Taxonomy of Viruses) and most crustacean reoviruses remain unclassified. This Cardoreovirus arises in part from ambiguous or incomplete information on which to categorize them. In recent years, increased Crabreovirus availability of crustacean reovirus genomic sequences is making the discovery and classification of crustacean Brachyuran Phylogenetic analysis reoviruses faster and more certain. This minireview describes the properties of the reoviruses infecting crusta ceans and suggests an overall classification of brachyuran crustacean reoviruses based on a combination of morphology, host, genome organization pattern and phylogenetic sequence analysis. 1. Introduction fish, crustaceans, marine protists, insects, ticks, arachnids, plants and fungi (Attoui et al., 2005; Shields et al., 2015). Host range and disease 1.1. Genera of Reoviridae family symptoms are also important indicators that help to identify viruses of different genera (Attoui et al., 2012). -
Historical Overview 1
Historical Overview 1 Contents 1.1 Since When Have We Known of Viruses? ................................................ 3 1.2 What Technical Advances Have Contributed to the Development of Modern Virology? .......................................................................... 4 1.2.1 Animal Experiments Have Provided Important Insights into the Pathogenesis of Viral Diseases .................................................... 5 1.2.2 Cell Culture Systems Are an Indispensable Basis for Virus Research ........... 6 1.2.3 Modern Molecular Biology Is also a Child of Virus Research ................... 8 1.3 What Is the Importance of the Henle–Koch Postulates? .................................. 9 1.4 What Is the Interrelationship Between Virus Research, Cancer Research, Neurobiology and Immunology? .......................................................... 10 1.4.1 Viruses are Able to Transform Cells and Cause Cancer .......................... 10 1.4.2 Central Nervous System Disorders Emerge as Late Sequelae of Slow Viral Infections ........................................................................... 12 1.4.3 Interferons Stimulate the Immune Defence Against Viral Infections . .. .. .. .. 12 1.5 What Strategies Underlie the Development of Antiviral Chemotherapeutic Agents? . 13 1.6 What Challenges Must Modern Virology Face in the Future? .. ... ... ... ... ... ... ... ... 13 Further Reading ................................................................................... 14 1.1 Since When Have We Known of Viruses? “Poisons” were -
Module1: General Concepts
NPTEL – Biotechnology – General Virology Module1: General Concepts Lecture 1: Virus history The history of virology goes back to the late 19th century, when German anatomist Dr Jacob Henle (discoverer of Henle’s loop) hypothesized the existence of infectious agent that were too small to be observed under light microscope. This idea fails to be accepted by the present scientific community in the absence of any direct evidence. At the same time three landmark discoveries came together that formed the founding stone of what we call today as medical science. The first discovery came from Louis Pasture (1822-1895) who gave the spontaneous generation theory from his famous swan-neck flask experiment. The second discovery came from Robert Koch (1843-1910), a student of Jacob Henle, who showed for first time that the anthrax and tuberculosis is caused by a bacillus, and finally Joseph Lister (1827-1912) gave the concept of sterility during the surgery and isolation of new organism. The history of viruses and the field of virology are broadly divided into three phases, namely discovery, early and modern. The discovery phase (1886-1913) In 1879, Adolf Mayer, a German scientist first observed the dark and light spot on infected leaves of tobacco plant and named it tobacco mosaic disease. Although he failed to describe the disease, he showed the infectious nature of the disease after inoculating the juice extract of diseased plant to a healthy one. The next step was taken by a Russian scientist Dimitri Ivanovsky in 1890, who demonstrated that sap of the leaves infected with tobacco mosaic disease retains its infectious property even after its filtration through a Chamberland filter. -
The Origin and Evolution of Viruses
Mini Review Agri Res & Tech: Open Access J Volume 21 Issue 5 - June 2019 Copyright © All rights are reserved by Luka AO Awata DOI: 10.19080/ARTOAJ.2019.21.556181 The Central Question in Virology: The Origin and Evolution of Viruses Luka AO Awata1*, Beatrice E Ifie2, Pangirayi Tongoona2, Eric Danquah2, Samuel Offei2 and Phillip W Marchelo D’ragga3 1Directorate of Research, Ministry of Agriculture and Food Security, South Sudan 2College of Basic and Applied Sciences, University of Ghana, Ghana 3Department of Agricultural Sciences, University of Juba, South Sudan Submission: June 01, 2019; Published: June 12, 2019 *Corresponding author: Luka AO Awata, Directorate of Research, Ministry of Agriculture and Food Security, Ministries Complex, Parliament Road, P.O. Box 33, Juba, South Sudan Abstract Viruses are major threats to both animals and plants worldwide. A virus exists as a set of one or more nucleic acid molecules normally encased in a protective coat of protein or lipoprotein. It is able to replicate itself within suitable host cells, causing diseases to plants and animals. While the three domains of life trace their linages back to a single protein (the Last Universal Cellular Ancestor (LUCA), information on parental molecule from which all viruses descended is inadequate. Structural analyses of capsid proteins suggest that there is no universal viral protein and different types of virions are mostly formed independently. As a result, it is impossible to neither include viruses in the Tree of Life of LUCA nor to draw a universal tree of viruses analogous to the tree of life. Although the concepts on the origin and evolution of viruses are well documented, the structure and biological activities of viruses are paradoxical. -
And Herpesvirus Infecti
Aus dem Max von Pettenkofer-Institut für Hygiene und Medizinische Mikrobiologie Lehrstuhl Virologie der Ludwig-Maximilians-Universität München Vorstand: Prof. Dr. med. Oliver T. Keppler Adeno-associated virus-based heterologous replicon technology for detection and quantification of adeno- and herpesvirus infections Dissertation zum Erwerb des Doktorgrades der Naturwissenschaften an der Medizinischen Fakultät der Ludwig-Maximilians-Universität zu München vorgelegt von Simona Langer, geb. Sigl aus Hollabrunn, Österreich 2019 Mit Genehmigung der Medizinischen Fakultät der Universität München Betreuerin: Priv. Doz. Dr. Barbara Adler Zweitgutachter: Prof. Dr. Reinhard Zeidler Dekan: Prof. Dr. med. dent. Reinhard Hickel Tag der mündlichen Prüfung: 02.08.2019 Eidesstattliche Versicherung Langer Simona Ich erkläre hiermit an Eides statt, dass ich die vorliegende Dissertation mit dem Thema Adeno-associated virus-based heterologous replicon technology for detection and quantification of adeno- and herpesvirus infections selbstständig verfasst, mich außer der angegebenen keiner weiteren Hilfsmittel bedient und alle Erkenntnisse, die aus dem Schrifttum ganz oder annähernd übernommen sind, als solche kenntlich gemacht und nach ihrer Herkunft unter Bezeichnung der Fundstellen einzeln nachgewiesen habe. Ich erkläre des Weiteren, dass die hier vorgelegte Dissertation nicht in gleicher oder in ähnlicher Form bei einer anderen Stelle zur Erlangung eines akademischen Grades eingereicht wurde. München, 16.02.2019 Simona Langer This page intentionally left -
Isolation of a Novel Fusogenic Orthoreovirus from Eucampsipoda Africana Bat Flies in South Africa
viruses Article Isolation of a Novel Fusogenic Orthoreovirus from Eucampsipoda africana Bat Flies in South Africa Petrus Jansen van Vuren 1,2, Michael Wiley 3, Gustavo Palacios 3, Nadia Storm 1,2, Stewart McCulloch 2, Wanda Markotter 2, Monica Birkhead 1, Alan Kemp 1 and Janusz T. Paweska 1,2,4,* 1 Centre for Emerging and Zoonotic Diseases, National Institute for Communicable Diseases, National Health Laboratory Service, Sandringham 2131, South Africa; [email protected] (P.J.v.V.); [email protected] (N.S.); [email protected] (M.B.); [email protected] (A.K.) 2 Department of Microbiology and Plant Pathology, Faculty of Natural and Agricultural Science, University of Pretoria, Pretoria 0028, South Africa; [email protected] (S.M.); [email protected] (W.K.) 3 Center for Genomic Science, United States Army Medical Research Institute of Infectious Diseases, Frederick, MD 21702, USA; [email protected] (M.W.); [email protected] (G.P.) 4 Faculty of Health Sciences, University of the Witwatersrand, Johannesburg 2193, South Africa * Correspondence: [email protected]; Tel.: +27-11-3866382 Academic Editor: Andrew Mehle Received: 27 November 2015; Accepted: 23 February 2016; Published: 29 February 2016 Abstract: We report on the isolation of a novel fusogenic orthoreovirus from bat flies (Eucampsipoda africana) associated with Egyptian fruit bats (Rousettus aegyptiacus) collected in South Africa. Complete sequences of the ten dsRNA genome segments of the virus, tentatively named Mahlapitsi virus (MAHLV), were determined. Phylogenetic analysis places this virus into a distinct clade with Baboon orthoreovirus, Bush viper reovirus and the bat-associated Broome virus. -
1 Chapter I Overall Issues of Virus and Host Evolution
CHAPTER I OVERALL ISSUES OF VIRUS AND HOST EVOLUTION tree of life. Yet viruses do have the This book seeks to present the evolution of characteristics of life, can be killed, can become viruses from the perspective of the evolution extinct and adhere to the rules of evolutionary of their host. Since viruses essentially infect biology and Darwinian selection. In addition, all life forms, the book will broadly cover all viruses have enormous impact on the evolution life. Such an organization of the virus of their host. Viruses are ancient life forms, their literature will thus differ considerably from numbers are vast and their role in the fabric of the usual pattern of presenting viruses life is fundamental and unending. They according to either the virus type or the type represent the leading edge of evolution of all of host disease they are associated with. In living entities and they must no longer be left out so doing, it presents the broad patterns of the of the tree of life. evolution of life and evaluates the role of viruses in host evolution as well as the role Definitions. The concept of a virus has old of host in virus evolution. This book also origins, yet our modern understanding or seeks to broadly consider and present the definition of a virus is relatively recent and role of persistent viruses in evolution. directly associated with our unraveling the nature Although we have come to realize that viral of genes and nucleic acids in biological systems. persistence is indeed a common relationship As it will be important to avoid the perpetuation between virus and host, it is usually of some of the vague and sometimes inaccurate considered as a variation of a host infection views of viruses, below we present some pattern and not the basis from which to definitions that apply to modern virology.