Appendix 1 – Transmission Electron Microscopy in Virology: Principles, Preparation Methods and Rapid Diagnosis
Total Page:16
File Type:pdf, Size:1020Kb

Load more
Recommended publications
-
Arxiv:1903.01048V1 [Stat.AP] 4 Mar 2019 Author Summary
Early Detection of Influenza outbreaks in the United States Kai Liu1,3*, Ravi Srinivasan2, Lauren Ancel Meyers1,4 1 Departments of Integrative Biology and Statistics & Data Sciences, The University of Texas at Austin, Austin, TX, US 2 Applied Research Laboratories, The University of Texas at Austin, Austin, TX, US 3 Institute for Cellular and Molecular Biology, The University of Texas at Austin, Austin, TX, US 4 Santa Fe Institute, Santa Fe, NM, US * [email protected] Abstract Public health surveillance systems often fail to detect emerging infectious diseases, particularly in resource limited settings. By integrating relevant clinical and internet-source data, we can close critical gaps in coverage and accelerate outbreak detection. Here, we present a multivariate algorithm that uses freely available online data to provide early warning of emerging influenza epidemics in the US. We evaluated 240 candidate predictors and found that the most predictive combination does not include surveillance or electronic health records data, but instead consists of eight Google search and Wikipedia pageview time series reflecting changing levels of interest in influenza-related topics. In cross validation on 2010-2016 data, this algorithm sounds alarms an average of 16.4 weeks prior to influenza activity reaching the Center for Disease Control and Prevention (CDC) threshold for declaring the start of the season. In an out-of-sample test on data from the rapidly-emerging fall wave of the 2009 H1N1 pandemic, it recognized the threat five weeks in advance of this surveillance threshold. Simpler algorithms, including fixed week-of-the-year triggers, lag the optimized alarms by only a few weeks when detecting seasonal influenza, but fail to provide early warning in the 2009 pandemic scenario. -
Using Cell Lines to Study Factors Affecting Transmission of Fish Viruses
Using cell lines to study factors affecting transmission of fish viruses by Phuc Hoang Pham A thesis presented to the University of Waterloo in fulfillment of the thesis requirement for the degree of Doctor of Philosophy in Biology Waterloo, Ontario, Canada, 2014 ©Phuc Hoang Pham 2014 AUTHOR'S DECLARATION I hereby declare that I am the sole author of this thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. ii ABSTRACT Factors that can influence the transmission of aquatic viruses in fish production facilities and natural environment are the immune defense of host species, the ability of viruses to infect host cells, and the environmental persistence of viruses. In this thesis, fish cell lines were used to study different aspects of these factors. Five viruses were used in this study: viral hemorrhagic septicemia virus (VHSV) from the Rhabdoviridae family; chum salmon reovirus (CSV) from the Reoviridae family; infectious pancreatic necrosis virus (IPNV) from the Birnaviridae family; and grouper iridovirus (GIV) and frog virus-3 (FV3) from the Iridoviridae family. The first factor affecting the transmission of fish viruses examined in this thesis is the immune defense of host species. In this work, infections of marine VHSV-IVa and freshwater VHSV-IVb were studied in two rainbow trout cell lines, RTgill-W1 from the gill epithelium, and RTS11 from spleen macrophages. RTgill-W1 produced infectious progeny of both VHSV-IVa and -IVb. However, VHSV-IVa was more infectious than IVb toward RTgill-W1: IVa caused cytopathic effects (CPE) at a lower viral titre, elicited CPE earlier, and yielded higher titres. -
Trunkloads of Viruses
COMMENTARY Trunkloads of Viruses Philip E. Pellett Department of Immunology and Microbiology, Wayne State University School of Medicine, Detroit, Michigan, USA Elephant populations are under intense pressure internationally from habitat destruction and poaching for ivory and meat. They also face pressure from infectious agents, including elephant endotheliotropic herpesvirus 1 (EEHV1), which kills ϳ20% of Asian elephants (Elephas maximus) born in zoos and causes disease in the wild. EEHV1 is one of at least six distinct EEHV in a phylogenetic lineage that appears to represent an ancient but newly recognized subfamily (the Deltaherpesvirinae) in the family Herpesviridae. lephant endotheliotropic herpesvirus 1 (EEHV1) causes a rap- the Herpesviridae (the current complete list of approved virus tax- Downloaded from Eidly progressing and usually fatal hemorrhagic disease that ons is available at http://ictvonline.org/). In addition, approxi- occurs in the wild in Asia and affects ϳ20% of Asian elephant mately 200 additional viruses detected using methods such as (Elephas maximus) calves born in zoos in the United States and those described above await formal consideration (V. Lacoste, Europe (1). About 60% of juvenile deaths of captive elephants are personal communication). With very few exceptions, the amino attributed to such infections. Development of control measures acid sequence of a small conserved segment of the viral DNA poly- has been hampered by the lack of systems for culture of the virus in merase (ϳ150 amino acids) is sufficient to not only reliably iden- laboratories. Its genetic study has been restricted to analysis of tify a virus as belonging to the evolutionary lineage represented by blood, trunk wash fluid, and tissue samples collected during nec- the Herpesviridae, but also their subfamily, and in most cases a http://jvi.asm.org/ ropsies. -
Changes to Virus Taxonomy 2004
Arch Virol (2005) 150: 189–198 DOI 10.1007/s00705-004-0429-1 Changes to virus taxonomy 2004 M. A. Mayo (ICTV Secretary) Scottish Crop Research Institute, Invergowrie, Dundee, U.K. Received July 30, 2004; accepted September 25, 2004 Published online November 10, 2004 c Springer-Verlag 2004 This note presents a compilation of recent changes to virus taxonomy decided by voting by the ICTV membership following recommendations from the ICTV Executive Committee. The changes are presented in the Table as decisions promoted by the Subcommittees of the EC and are grouped according to the major hosts of the viruses involved. These new taxa will be presented in more detail in the 8th ICTV Report scheduled to be published near the end of 2004 (Fauquet et al., 2004). Fauquet, C.M., Mayo, M.A., Maniloff, J., Desselberger, U., and Ball, L.A. (eds) (2004). Virus Taxonomy, VIIIth Report of the ICTV. Elsevier/Academic Press, London, pp. 1258. Recent changes to virus taxonomy Viruses of vertebrates Family Arenaviridae • Designate Cupixi virus as a species in the genus Arenavirus • Designate Bear Canyon virus as a species in the genus Arenavirus • Designate Allpahuayo virus as a species in the genus Arenavirus Family Birnaviridae • Assign Blotched snakehead virus as an unassigned species in family Birnaviridae Family Circoviridae • Create a new genus (Anellovirus) with Torque teno virus as type species Family Coronaviridae • Recognize a new species Severe acute respiratory syndrome coronavirus in the genus Coro- navirus, family Coronaviridae, order Nidovirales -
GB Virus C/Hepatitis G Virus Does Not Induce Expression of P44 Antigen in Chimpanzee Hepatocytes Yohko K
Jpn. J. Infect. Dis., 54, 2001 and skin were removed was purchased on the previous night ongln Of infection was not clear. The food service in a festival of the festival. It was left in the room temperature ovemight. as described in the present case does not requlre regulation The cooking started at 4 0'clock in the momlng by roastlng under the food hyglene law. This incident indicated the the bulk meat by rotation over a gas bumer. The meat was necessity of proper measures for food security in this type of covered by a large steel box during roastlng. It was cut into short temporary food service and regulatory measures in case small pleCeS and served at 10 o'clock in the momlng. Some of possible occurrences of food poISOnlng. noted that some portion of the meat was rare; i.e., it was insufficiently cooked. Laboratory and other epidemiologlCal data will be published ln the outbreak, a total 58 cases were counted. There were in Infectious Agents Surveillance Report, vol. 22 (June, 200 I ). 41 primary infections, 1 1 secondary infections including a We thank the clinical institutions, schools and other institu- case which took place in a nursery school, and 6 cases whose tions fわr their collaboration. Laboratory and Epidemiology Communications GB Virus C/Hepatitis G Virus Does Not Induce Expression of p44 Antigen in Chimpanzee Hepatocytes Yohko K. Shimizu*, Minako Hijikata and Hiroshi Yoshikural Department ofRespiratoyy Diseases, Research Institute, International Medical Center ofJapan, Toyama 1-21-1 Shinjuku-ku, Too,0 162-8655 and JNational Institute ofInfectious Diseases, Toyama 1-23-1, Shinjuku-ku, Tokyo 162-8640 Communicated by Hiroshi Ybshikura (Accepted June 1, 2001) The cytoplasmic antlgen, p44, was orlglnally discovered found chimpanzees whose sera were positive for GBV-C什IGV in hepatocytes of chimpanzees experimentally infected with RNA by RTIPCR. -
(12) United States Patent (10) Patent No.: US 9,096,585 B2 Shaw Et Al
US009096585B2 (12) United States Patent (10) Patent No.: US 9,096,585 B2 Shaw et al. (45) Date of Patent: Aug. 4, 2015 (54) ANTIVIRAL COMPOUNDS AND USES (2013.01); C07D 413/10 (2013.01); C07D THEREOF 413/12 (2013.01); A61 K 3 1/5377 (2013.01); A61 K3I/55 (2013.01) (75) Inventors: Megan Shaw, New York, NY (US); (58) Field of Classification Search Hans-Heinrich Hoffmann, New York, CPC. A61K 31/4245; A61K31/5377; A61K31/55 NY (US); Adolfo Garcia-Sastre, New USPC .................................... 514/364, 217.1, 236.2 York, NY (US); Peter Palese, Leonia, NJ See application file for complete search history. US (US) (56) References Cited (73) Assignee: Icahn School of Medicine at Mount Sinai, New York, NY (US) U.S. PATENT DOCUMENTS 6,384,064 B2 5, 2002 Camden (*) Notice: Subject to any disclaimer, the term of this 8,278,342 B2 10/2012 Ricciardi patent is extended or adjusted under 35 Continued U.S.C. 154(b) by 210 days. (Continued) (21) Appl. No.: 13? 700,049 FOREIGN PATENT DOCUMENTS y x- - - 9 (22) PCT Filed1C Mavay 31,51, 2011 WO WO 2009,136979 A2 11/2009 OTHER PUBLICATIONS (86). PCT No.: PCT/US2011/038515 Chu et al. "Analysis of the endocytic pathway mediating the infec S371 (c)(1), tious entry of mosquito-borne flavivirus West Nile into Aedes (2), (4) Date: Feb. 14, 2013 albopictus mosquito (C6/36) cells.” Virology, 2006, vol. 349, pp. 463-475. (87) PCT Pub. No.: WO2011/150413 (Continued) PCT Pub. Date: Dec. 1, 2011 Primary Examiner — Shengjun Wang (65) Prior Publication Data (74) Attorney, Agent, or Firm — Jones Day US 2013/O137678A1 May 30, 2013 (57) ABSTRACT O O Described herein are Compounds, compositions comprising Related U.S. -
Zinc and Copper Ions Differentially Regulate Prion-Like Phase
viruses Article Zinc and Copper Ions Differentially Regulate Prion-Like Phase Separation Dynamics of Pan-Virus Nucleocapsid Biomolecular Condensates Anne Monette 1,* and Andrew J. Mouland 1,2,* 1 Lady Davis Institute at the Jewish General Hospital, Montréal, QC H3T 1E2, Canada 2 Department of Medicine, McGill University, Montréal, QC H4A 3J1, Canada * Correspondence: [email protected] (A.M.); [email protected] (A.J.M.) Received: 2 September 2020; Accepted: 12 October 2020; Published: 18 October 2020 Abstract: Liquid-liquid phase separation (LLPS) is a rapidly growing research focus due to numerous demonstrations that many cellular proteins phase-separate to form biomolecular condensates (BMCs) that nucleate membraneless organelles (MLOs). A growing repertoire of mechanisms supporting BMC formation, composition, dynamics, and functions are becoming elucidated. BMCs are now appreciated as required for several steps of gene regulation, while their deregulation promotes pathological aggregates, such as stress granules (SGs) and insoluble irreversible plaques that are hallmarks of neurodegenerative diseases. Treatment of BMC-related diseases will greatly benefit from identification of therapeutics preventing pathological aggregates while sparing BMCs required for cellular functions. Numerous viruses that block SG assembly also utilize or engineer BMCs for their replication. While BMC formation first depends on prion-like disordered protein domains (PrLDs), metal ion-controlled RNA-binding domains (RBDs) also orchestrate their formation. Virus replication and viral genomic RNA (vRNA) packaging dynamics involving nucleocapsid (NC) proteins and their orthologs rely on Zinc (Zn) availability, while virus morphology and infectivity are negatively influenced by excess Copper (Cu). While virus infections modify physiological metal homeostasis towards an increased copper to zinc ratio (Cu/Zn), how and why they do this remains elusive. -
Detection and Characterization of a Novel Marine Birnavirus Isolated from Asian Seabass in Singapore
Chen et al. Virology Journal (2019) 16:71 https://doi.org/10.1186/s12985-019-1174-0 RESEARCH Open Access Detection and characterization of a novel marine birnavirus isolated from Asian seabass in Singapore Jing Chen1†, Xinyu Toh1†, Jasmine Ong1, Yahui Wang1, Xuan-Hui Teo1, Bernett Lee2, Pui-San Wong3, Denyse Khor1, Shin-Min Chong1, Diana Chee1, Alvin Wee1, Yifan Wang1, Mee-Keun Ng1, Boon-Huan Tan3 and Taoqi Huangfu1* Abstract Background: Lates calcarifer, known as seabass in Asia and barramundi in Australia, is a widely farmed species internationally and in Southeast Asia and any disease outbreak will have a great economic impact on the aquaculture industry. Through disease investigation of Asian seabass from a coastal fish farm in 2015 in Singapore, a novel birnavirus named Lates calcarifer Birnavirus (LCBV) was detected and we sought to isolate and characterize the virus through molecular and biochemical methods. Methods: In order to propagate the novel birnavirus LCBV, the virus was inoculated into the Bluegill Fry (BF-2) cell line and similar clinical signs of disease were reproduced in an experimental fish challenge study using the virus isolate. Virus morphology was visualized using transmission electron microscopy (TEM). Biochemical analysis using chloroform and 5-Bromo-2′-deoxyuridine (BUDR) sensitivity assays were employed to characterize the virus. Next-Generation Sequencing (NGS) was also used to obtain the virus genome for genetic and phylogenetic analyses. Results: The LCBV-infected BF-2 cell line showed cytopathic effects such as rounding and granulation of cells, localized cell death and detachment of cells observed at 3 to 5 days’ post-infection. -
Feline Calicivirus Ulcer on Tongue Unilateral Conjunctivitis Typical of Early Chlamydophila Felis Infection Feline Chronic Lymphocytic Plasmacytic Gingivostomatitis
£5.00, $9.00, €7.50 Melchizedek publications www.catvirus.com If you print this book out – please do so on recycled paper! Cover photos – feline calicivirus ulcer on tongue unilateral conjunctivitis typical of early Chlamydophila felis infection feline chronic lymphocytic plasmacytic gingivostomatitis © Diane D. Addie PhD BVMS MRCVS Sep 2006 2 Contents Page Introduction ………………………………………………………………………. 4 Feline calicivirus………………………………………………………………….. 4 Feline chronic gingivostomatitis ………………………………………….. .….. 7 Feline herpesvirus (viral rhinotracheitis)……………………………………….. 10 Chlamydophila felis……………………………………………………………….. 13 Bordetella bronchiseptica ……………………………………………………….. 16 Avian influenza virus H5N1 …………………………………………………….. 17 Poxvirus …………………………………………………………………………… 19 Feline coronavirus ……………………………………………………………….. 19 Haemophilus felis ………………………………………………………………… 19 Aelurostrongylus abstrusus …………………………………………………….. 19 Mycoplasma felis ………………………………………………………………… 20 Corynebacterium spp ……………………………………………………………. 20 Cryptococcus spp ……………………………..…………………………………. 20 Capillaria aerophila ………………………………………………………………. 21 Cuterebra larval migrans ………………………………………………………… 21 Differential diagnoses …………………………………………………………… 22 acute oral ulceration …………………………………… 22 chronic gingivostomatitis……………………………….. 22 chronic rhinitis ………………………………………….. 22 conjunctivitis ……………………………………………. 23 coughing ………………………………………………… 23 fading kittens ……………………………………………. 23 bronchopneumonia of kittens …………………………. 24 Preventing respiratory infection 25 hygiene ………………………………………. 25 barrier nursing -
Prevalence and Clinical Significance of HGV/GBV-C Infection in Patients
Jpn. J. Infect. Dis., 59, 25-30, 2006 Original Article Prevalence and Clinical Significance of HGV/GBV-C Infection in Patients with Chronic Hepatitis B or C Jeng-Fu Yang1,2, Chia-Yen Dai2,3, Wan-Long Chuang2, Wen-Yi Lin1,2, Zu-Yau Lin2, Shinn-Cherng Chen2, Ming-Yuh Hsieh2, Liang-Yen Wang2, Jung-Fa Tsai2, Wen-Yu Chang2 and Ming-Lung Yu1,2* 1Department of Preventive Medicine and 2Department of Medicine, Kaohsiung Medical University Hospital, and 3Department of Occupational Medicine, Kaohsiung Municipal HsiaoKang Hospital, Kaohsiung, Taiwan (Received July 5, 2005. Accepted November 11, 2005) SUMMARY: Hepatitis G virus/GB virus-C (HGV/GBV-C) is a newly identified Flavivirus. Its clinical signifi- cance in chronic hepatitis B and C remains controversial. Infection with HGV/GBV-C was surveyed in 500 blood donors, 130 patients with chronic hepatitis B and 173 with hepatitis C, with chronic liver disease, cirrhosis, and/or hepatocellular carcinoma (HCC). HGV/GBV-C RNA was detected by reverse transcription-polymerase chain reaction. An antibody to HGV/GBV-C’s second envelope protein (anti-E2 Ab) was detected using an enzyme immunoassay. The prevalence of HGV/GBV-C RNA was 3.4% and the exposure rate 10.2% in blood donors. The prevalence of HGV/GBV-C RNA in patients with chronic hepatitis B and hepatitis C was 7.7 and 17.3%, respectively (P = 0.002). The prevalence of the HGV/GBV-C infection in hepatitis B carriers increased with the severity of chronic liver disease and risk of HCC. The age and duration of hepatitis B virus infection were the more important contributing factors. -
How Influenza Virus Uses Host Cell Pathways During Uncoating
cells Review How Influenza Virus Uses Host Cell Pathways during Uncoating Etori Aguiar Moreira 1 , Yohei Yamauchi 2 and Patrick Matthias 1,3,* 1 Friedrich Miescher Institute for Biomedical Research, 4058 Basel, Switzerland; [email protected] 2 Faculty of Life Sciences, School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, UK; [email protected] 3 Faculty of Sciences, University of Basel, 4031 Basel, Switzerland * Correspondence: [email protected] Abstract: Influenza is a zoonotic respiratory disease of major public health interest due to its pan- demic potential, and a threat to animals and the human population. The influenza A virus genome consists of eight single-stranded RNA segments sequestered within a protein capsid and a lipid bilayer envelope. During host cell entry, cellular cues contribute to viral conformational changes that promote critical events such as fusion with late endosomes, capsid uncoating and viral genome release into the cytosol. In this focused review, we concisely describe the virus infection cycle and highlight the recent findings of host cell pathways and cytosolic proteins that assist influenza uncoating during host cell entry. Keywords: influenza; capsid uncoating; HDAC6; ubiquitin; EPS8; TNPO1; pandemic; M1; virus– host interaction Citation: Moreira, E.A.; Yamauchi, Y.; Matthias, P. How Influenza Virus Uses Host Cell Pathways during 1. Introduction Uncoating. Cells 2021, 10, 1722. Viruses are microscopic parasites that, unable to self-replicate, subvert a host cell https://doi.org/10.3390/ for their replication and propagation. Despite their apparent simplicity, they can cause cells10071722 severe diseases and even pose pandemic threats [1–3]. -
And Γ- Cytoplasmic Actin in Vaccinia Virus Infection
Lights, Camera, Actin: Divergent roles of β- and γ- cytoplasmic actin in vaccinia virus infection NOORUL BISHARA MARZOOK A thesis submitted in fulfillment of requirements for the degree of Doctor of Philosophy FACULTY OF SCIENCE SCHOOL OF MOLECULAR BIOSCIENCE UNIVERSITY OF SYDNEY 2017 i TABLE OF CONTENTS Table of Contents ........................................................................................................... ii Acknowledgements ....................................................................................................... v Declaration ................................................................................................................... vii Abstract ....................................................................................................................... viii List of Figures ................................................................................................................ x List of Publications Arising From This Work.............................................................. xi Abbreviations Used ..................................................................................................... xii Chapter 1: Introduction ............................................................................................... 1 1.1 The Cytoskeleton ............................................................................................................ 2 1.1.1 The Eukaryotic Cytoskeleton .....................................................................................