SARS was the ?rst new plague of the twenty-?rst century. Within months, it spread worldwide from its "birthplace" in Guangdong Province, China, affecting over 8,000 people in 25 countries and territories across ?ve continents. SARS exposed the vulnerability of our modern globalised world to the spread of a new emerging infection. SARS (or a similar new emerging disease) could neither have spread so rapidly nor had such a great global impact even 50 years ago, and arguably, it was itself a product of our global inter-connectedness. Increasing af?uence and a demand for wild-game as exotic food led to the development of large trade of live animal and game animal markets where many species of wild and domestic animals were co-housed, providing the ideal opportunities for inter-species tra- mission of viruses and other microbes. Once such a virus jumped species and attacked humans, the increased human mobility allowed the virus the opportunity for rapid spread. An infected patient from Guangdong who stayed for one day at a hotel in Hong Kong led to the transmission of the disease to 16 other guests who travelled on to seed outbreaks of the disease in Toronto, Singapore, and Vietnam, as well as within Hong Kong itself. The virus exploited the practices used in modern intensive care of patients with severe respiratory disease and the weakness in infection control practices within our health care systems to cause outbreaks within hospitals, further amplifying the spread of the disease. Health-care itself has become a two-edged sword.

Bluetongue may be described as an acute insect borne disease of ruminants, manifested clinically in sheep by a catarrhal inflammation of the mucous mem branes of the digestive and respiratory systems and associated with degenerative changes in the skeletal musculature. The profound emaciation and weakness which follow the acute disease are responsible for a protracted convalescence and for serious economic losses due to diminished productivity. II. Historical During the early colonisation of Africa, susceptible Merino and other European breeds of sheep were introduced into the Cape, at first by the Dutch East India Company between 1652 and 1785 and again later in 1870. A report of the Cattle and Sheep Diseases Commission (1876) records the appearance of a serious febrile disease amongst these imported sheep in which both morbidity and mortality was high (cited by HENNING, 1949). HuTCHEON (1881) gave this disease the name of "Fever" or "Epizootic Catarrh," in order to distinguish it from other clinical conditions of a similar nature encountered amongst sheep. In the first com prehensive description of this clinical syndrome and its epizootiology HuTCHEON (1902) referred to it as "Malarial Catarrhal Fever of Sheep," a designation which was obviously influenced by the mistaken belief that an intracorpuscular parasite was the primary cause of the disease. More systematic studies were conducted by SPREULL (1902; 1905), who endeavoured to immunize sheep by the simultaneous inoculation of immune serum and infective blood."

Viral Diseases of Field and Horticultural Crops details the fundamental and applied aspects of the viral diseases of field and horticultural crops. The book opens with a historical introduction to plant virology, important plant virologists, and landmarks. It continues with systematic coverage of viral diseases, their economic significance, disease symptoms, host range, mode of transmission, diagnostic techniques, geographic distribution, epidemiology, yield losses, and control and management of the disease. Contributions from an international group of virologists with a wide range of academic, research, professional, and specialized backgrounds in plant virology makes Viral Diseases of Field and Horticultural Crops a comprehensive and must-have resource for those engaged in the study and research of plant virology, microbiology, and plant pathology particularly viral diseases and their impact on field and horticultural crops.

The decision to write a book about the practical aspects of the baculovirus expression system stems from the numerous phone calls for help we have had, and from the many visitors to our labora tories requiring assistance to find the elusive polyhedrin-negative virus containing their favourite gene. We have also organized two expression system workshops and from the manuals we wrote for these, it seemed a logical progression to extend them into book form. We appreciate that those who are 'old-hands' at the baculovirus expression system may have differing views on some of our procedures, but the methods in this book are presented in the light of our own experiences in the laboratory and from our practical workshops, and we hope that the book will be especially useful to those new to the system. The first three chapters give the background information to the baculovirus expression system, and includes advice on how to choose the right transfer vector and discusses the various methods that are available to select recombinant viruses. The practical chapters concentrate on those aspects which are novel to the baculovirus system (insect cell culture, virus amplification and titration, etc. ) and, in general, leave the standard molecular biological techniques to the other excellent laboratory manuals that are available. However, for completeness sake and to avoid constant reference to other manuals, we have included brief details of some standard techniques where they are integral to the success of the baculovirus protocols."

It is hardly necessary to define the concept of receptors to readers of this series, but it should be born in mind that in several instances receptors are undefined entities, whose molecular details remain to be established. On the other hand the ligand, which reco izes the receptors, has been identified and characterized in most cases. The current interest in the structure and function of biological membranes gives great expectations that in the near future we may understand the details of ligand-receptor interaction. This interaction involves two defined steps: the first, usually referred to as recognition, is followed by the second step, transduction, in which the ligand-receptor interaction is translated by the cell into a biochemical action. The present two volumes which cover prokaryotic and eukaryotic virus receptors, have been published together in order to illustrate the specificity of virus receptor recognition which appears to be a guiding principle for both bacteria and higher cells. The identification and characterization of the receptors for phages of gram-negative bacteria has to a large extent relied on the genetic techniques available for these organisms. In a similar way the availability of genetic systems has also clarified the interrelationship between animal retrovirus receptors even if the molecular structure remains to be determined. The paucity of defined genetic systems may therefore explain part of our ignorance concerning the molecular details of virus receptors on human cells and possibly also on gram positive bacteria."

Plant RNA Viruses: Molecular Pathogenesis and Management provides wide-ranging coverage on the recognition and signaling events between plants and RNA viruses. The book examines the molecular biology of signaling, host-virus interaction, RNA virus diversity, and how plants and cellular pathogens interact. Sections cover Virus Diversity and Diagnosis, Virus-Host Interactions and Virus Management. Specific chapters discuss classification and nomenclature of viruses, detail the molecular characteristics of viral genomes, highlight the viral manipulation of cellular key regulatory systems for successful virus infection, and discuss the movement of plant viruses into plant cells. Additional topics include RNA plant viruses and host interaction, detection and diversity of plant RNA viruses, and strategies for combating and management of plant viruses. With contributions from an international group of experts, the book is a comprehensive reference for those in research, academia, industry and anybody engaging in the study of plant viruses at the molecular level.

This book provides overviews and updates on basic research, diagnosis, epidemiology, and public health on enteric viruses, as well as on treatment and intervention to prevent their waterborne transmission. Data are presented and interpreted by leading researchers in the field in 13 chapters. An essential resource for virologists, epidemiologists, medical and public health professionals, graduate students and postdoctoral scientists at various levels of their careers.
Key Topics Include:
* Ecology of enteric viruses
* Intervention measures from risk assessment to virus disinfection practices
* Cutting edge technology on procedures for virus detection and monitoring in water and the water environment
* Quality assurance and quality control measures in water virology
* Legal regulations regarding viruses in the environment

Using different viral models, molecular pathways regulated by viral genes and their role in the pathogenesis of infection are analyzed. The book also offers an update of known signaling pathways in apoptosis and their role in normal and infected cells. Special emphasis is given to molecular pathways underlying viral transformation and oncogenesis and how research in this area is opening opportunities in cancer therapy.

A virologist's insight into how viruses evolve and why global epidemics are inevitable.

In 1993 a previously healthy young man was drowning in the middle of a desert, in fluids produced by his own lungs. This was the beginning of the terrifying Sin Nombre hantavirus epidemic and the start of a scientific journey that would forever change our understanding of what it means to be human. After witnessing the Sin Nombre outbreak, Dr Frank Ryan began researching viral evolution and was astonished to discover that it's inextricable from the evolution of all life on Earth. From AIDS and Ebola to the common cold, Ryan explores the role of the virus within every ecosystem on the planet.

His gripping conclusions shed new light on the natural world, proving that what doesn't kill you really does make you (and your species) stronger.

One hundred years ago, when Martinus W. Beijerinck in Delft and Friedrich Loeffler on Riems Island discovered a new class of infectious agents in plants and animals, a new discipline was born. This book, a compilation of papers written by well-recognized scientists, gives an impression of the early days, the pioneer period and the current state of virology. Recent developments and future perspectives of this discipline are sketched against a historic background. With contributions by A. Alcami, D. Baulcombe, F. Brown, L. W. Enquist, H. Feldmann, A. Garcia-Sastre, D. Griffiths, M. C. Horzinek, A. van Kammen, H.-D. Klenk, F. A. Murphy, T. Muster, R. O'Neill, P. Palese, C. Patience, R. Rott, H.- P. Schmiedebach, S. Schneider-Schaulies, G. L. Smith, J. A. Symons, Y. Takeuchi, V. ter Meulen, P. J. W. Venables, V. E. Volchkov, V. A. Volchkova, R. A. Weiss, W. Wittmann, H. Zheng

Rapid developments continue to take place in the research of viruses, the causative agents of infectious diseases in humans, animals, plants, invertebrates, protozoa, fungi, and bacteria. A still growing number of more than 30,000 viruses, virus strains, and subtypes are being tracked in various specialty laboratories and culture collections. In this situation of expansion and specialization, the International Committee on Taxonomy of Viruses was founded to establish, refine and maintain a universal virus taxonomy system giving information to virologists about the characteristics of the different groups of viruses. The Committee s Sixth Report includes one order, 71 families, 11 subfamilies, and 175 genera and more than 4,000 member viruses. On 600 printed pages large amounts of molecular biologic data, illustrated by micrographs and virion diagrams, gene maps and tables give a comprehensive overview and prove helpful in teaching, in diagnostics, in scholarly research, and in the practical areas of medicine, veterinary medicine, plant pathology, insect pest management, and biotechnology. ..". est une reference indispensable pour les chercheurs, les enseignants, les medecins ou les veterinaires mais aussi pour les etudiants et d une maniere generale pour toutes les personnes interessees par la virologie . Revue de Medecine Veterinaire ..". an excellent, well presented and informative volume. The report should be an essential reference volume for any department or organization involved in the study of viruses . Quarterly"

Positive-strand RNA viruses include the majority of the plant viruses, a number of insect viruses, and animal viruses, such as coronaviruses, togaviruses, flaviviruses, poliovirus, hepatitis C, and rhinoviruses. Works from more than 50 leading laboratories represent latest research on strategies for the control of virus diseases: molecular aspects of pathogenesis and virulence; genome replication and transcription; RNA recombination; RNA-protein interactions and host-virus interactions; protein expression and virion maturation; RNA replication; virus receptors; and virus structure and assembly. Highlights include analysis of the picornavirus IRES element, evidence for long term persistence of viral RNA in host cells, acquisition of new genes from the host and other viruses via copy-choice recombination, identification of molecular targets and use of structural and molecular biological studies for development of novel antiviral agents.

Among unconventional agents and unclassified viruses the contributions to this volume focused on prion-related diseases, with special emphasis on bovine spongiform encephalopathy and human spongiform encephalopathies, and Borna disease virus, an agent known since long time to be pathogenic for horses and sheep, which is now discussed as a potential pathogen for humans. Additionally, the volume contains articles about newly discovered viruses like porcine respiratory and reproductive syndrome virus and viruses that are classified only provisionally like African swine fever virus, hepatitis C and E viruses, or the arteriviruses.

How complex systems theory sheds new light on the adaptive dynamics of viral populations Viruses are everywhere, infecting all sorts of living organisms, from the tiniest bacteria to the largest mammals. Many are harmful parasites, but viruses also play a major role as drivers of our evolution as a species and are essential regulators of the composition and complexity of ecosystems on a global scale. This concise book draws on complex systems theory to provide a fresh look at viral origins, populations, and evolution, and the coevolutionary dynamics of viruses and their hosts. New viruses continue to emerge that threaten people, crops, and farm animals. Viruses constantly evade our immune systems, and antiviral therapies and vaccination campaigns can be powerless against them. These unique characteristics of virus biology are a consequence of their tremendous evolutionary potential, which enables viruses to quickly adapt to any environmental challenge. Ricard Sole and Santiago Elena present a unified framework for understanding viruses as complex adaptive systems. They show how the application of complex systems theory to viral dynamics has provided new insights into the development of AIDS in patients infected with HIV-1, the emergence of new antigenic variants of the influenza A virus, and other cutting-edge advances. Essential reading for biologists, physicists, and mathematicians interested in complexity, Viruses as Complex Adaptive Systems also extends the analogy of viruses to the evolution of other replicators such as computer viruses, cancer, and languages.

Recombinant viruses provide an efficient mechanism for the transfer and expression of DNA in eukaryotic cells. First, the transfer of DNA by viral infection-utilizing specific cell surface receptors and cellular intern- ization mechanisms-occurs much more readily than DNA transfer via uptake induced by such physical methods as calcium phosphate coprecipitation or electroporation. Second, the novel strategies employed by the virus to express its own genes can then be "hijacked" in the recombinant virus to express the researcher's gene of interest The purpose of Practical Molecular Virology isthus to compile a coll- tion of readily repeatable gene transfer and expression methods from wo- ers expert in the use of a variety of recombinant viral vectors . These include those designed for the production of recombinant antigens, such as pol- virus and yeast Ty-VLPs; those giving very high levels of recombinant protein expression, for example, baculovirus, vaccinia virus, and SV40; and finally viral vectors used for efficient, stable gene transfer to eu otic cells, such as retroviruses and herpesviruses . The first chapter describes the viral life cycle for each virus, and explains how this can be adapted to allow construction of recombinant vectors. Subsequent chapters deal with methods for producing and char- terizing recombinant viruses . I make no apology for the hyperproliferation of chapters dealing with recombinant retroviral methods and applications, since I believe this is clearly proportional to the recent expansion of interest in these techniques.

Geminivirus: Detection, Diagnosis and Management focuses on the latest techniques for managing diseases caused by these circular, single-stranded (ss) DNA genomes. The most significant impact of plant diseases in host populations is often caused by emerging diseases, whose incidence in a plant host is increasing as a result of long-term changes in their underlying epidemiology. Genetic changes in pathogen and host populations, as well as changes in host ecology and environment, are major factors contributing to disease emergence. Understanding plant virus evolution is crucial for modeling the within-host and between-host dynamics and genetics of virus populations. The book presents a comprehensive review of how these viruses develop, including contributing factors such as population bottlenecks during cell-to-cell movement, systemic colonization, or between-host transmission by different procedures. Presented in five sections-Detection and Diagnosis, Emergence and Diversity, Vector and Transmission, Virus-Host Interaction, and Disease Management, the book includes host range determinant and virulence factors involved in pathogenesis, virus-vector interactions during acquisition, retention, and transmission and evaluating management strategies to control Geminivirus. The book is an essential reference for students and researchers interested in plant virology, particularly begomoviruses, geminiviruses, and vector transmission biology. Introduces identification and characterization of geminiviruses that infect agricultural crops, their wild relatives, and weed hosts Discusses recombination and reassortment mechanisms influencing viral genetic diversity, virulence, and vector transmission Explores the origin, evolution, and bottlenecks of Geminiviruses

The Fifth Report of the International Committee on Taxonomy of Viruses (ICTV), summarizes the proceedings and decisions reached by the ICTV at its meetings held at the International Congresses of Virology in Sendai (1984), Edmonton (1987) and Berlin (1990). This report has been organized in the same way as the previous ones (Wildy, 1971; Fenner, 1976; Matthews, 1979; 1982), yet it encompasses many more families and groups of viruses than previous reports, and it includes new tables, diagrams and keys. The officers and members of the ICTV study groups from 1984 to 1990 are listed, as the current ICTV statutes and rules of nomenclature. Information on the format for submission of new taxonomic proposals to the ICTV is also provided. Since the Fourth Report of the ICTV (1982), 19 new virus families and groups have been described. This report includes 2,430 viruses belonging to 73 families or groups, as well as virus satellites and viroids descriptions, but it does not include descriptions not approved by the ICTV. It now will be possible to publish such preliminary, and in some cases controversial, descriptions in the Virology Division pages of the Archives of Virology --this will allow virologists to carry on the kind of interim dialogue that is necessary for arriving at broad agreement on taxonomic matters.

This volume summarizes selected papers presented at two symposia convened in the fall of 1989. The papers include information on the molecular biology, antigenicity, diagnosis, epidemiology, clinical aspects, pathogenesis, vaccines and other aspects of haermorrhagic fever with renal syndrome and tick (tick-borne encephalitis, Congo-Crimean haemorrhagic fever, Duqbe, orbiviruses, orthomyxoviruses) and mosquito-borne (California serogroup, alphaviruses from Mongolia, sandfly fevers in Central Asia and Afghanistan) viruses. Although covering a wide range of subjects and perspectives, the book is intended to provide readers with an integrated view of the geographical distribution, properties and effects, recognition and prevention of infections with these and other viruses. Included are papers describing newly recognized viruses, virus diseases, foci, techniques for detection and diagnosis, and vaccines.

This introductory textbook was first published in 1978. It was originally intended primarily for students who wanted to obtain a simplified picture of what viruses are like and how they can multiply and cause disease. Today, it still provides a general overall picture of virology, emphasising the underlying fundamental biochemical principles rather than detailing the complexities of different viruses or clinical problems. The mechanisms of replication and the variety of structures found in viruses are dealt with from a comparative standpoint. A working knowledge of proteins, nucleic acids and lipids is assumed.

The fourth volume of "Advances in Antiviral Drug Design" is keeping up with the recent progress made in the broad field of antiviral drug research and encompasses six specific directions that have opened new avenues for the treatment of HIV and other virus infections.
First, as the introductory chapter, the different new anti-HIV agents that are now in preclinical or clinical development are reviewed by E. De Clercq. This includes new NRTIs, NNRTIs and PIs, but also HIV entry/fusion inhibitors as well as integrase inhibitors, and some of these agents, such as the NRTI emtricitabine [(-)FTC] and the PI atazanavir, may soon be licensed for clinical use.
Second, high expectations are vested in the potential therapeutic usefulness of inhibitors of HIV integration, a point of no return in the life cycle of HIV, and this approach is highlighted by D.J. Hazuda and S.D. Young.
Third, as all currently available PIs can be described as "peptidomimetic," and, therefore, expected to demonstrate overlapping virus-drug resistance and side effect profiles, it would be interesting to see how a non-peptidic protease inhibitor such as tipranavir behaves, and this is covered by D. Mayers, K. Curry, V. Kohlbrenner and S. McCallister.
Fourth, neuraminidase inhibitors such as zanamivir (that has to be inhaled) and oseltamivir (that can be administered via the oral route) have gained a definitive status as antiviral drugs useful for both therapy and prophylaxis of influenza A and B virus infections; as they target a specific influenza viral enzyme, neuraminidase (or sialidase), they may be expected to block newly emerging influenza viruses as well, and the design of neuraminidase inhibitorshas received due attention of H. Jin and C.U. Kim.
Fifth, while the major current efforts in antiviral drug development have shifted from herpesviruses towards HIV and hepatitis viruses [hepatitis B virus (HBV), hepatitis C virus (HCV)], it is interesting to note that by switching from the classical five-membered sugar or acyclic nucleoside strategy, J. Wang, M. Froeyen and P. Herdewijn have gone "upstream" in designing six-membered carbocyclic nucleosides as potential anti-herpesvirus agents.
Sixth, following up on the nucleotide prodrug strategy introduced above under ix, to deliver the biologically active nucleotides inside the cells, C. Meier has elaborated on a particular class of such pronucleotides, namely that of the cyclosaligenyl pronucleotides, an approach that should have far reaching implications for compounds effective against HIV, HBV and other viruses.
The six topics covered in this fourth volume of "Advances in Antiviral Drug Design" are in the front line of the present endeavors towards the design and development of new therapeutic agents for virus infections. They pertain to the combat against three of the most important viral pathogens of current times: HIV, HBV, influenza virus and herpesviruses.

Encyclopedia of Virology, Fourth Edition, Five Volume Set builds on the solid foundation laid by the previous editions, expanding its reach with new and timely topics. In five volumes, the work provides comprehensive coverage of the whole virosphere, making this a unique resource. Content explores viruses present in the environment and the pathogenic viruses of humans, animals, plants and microorganisms. Key areas and concepts concerning virus classification, structure, epidemiology, pathogenesis, diagnosis, treatment and prevention are discussed, guiding the reader through chapters that are presented at an accessible level, and include further readings for those needing more specific information. More than ever now, with the Covid19 pandemic, we are seeing the huge impact viruses have on our life and society. This encyclopedia is a must-have resource for scientists and practitioners, and a great source of information for the wider public.

We have attempted to provide a concise and up to date account of human viruses in the environment with attention to basic tools now available for monitoring viruses. We have aimed this introductory volume at young students, teachers and investigators in microbiology, virology, environmental engineering and health sciences. As the routes for virus dissemination become more varied, there is an enhanced potential for causing infection in humans. Improvement in the development of control strategies will alleviate the magnitude of viral pollution of the environment. This volume will introduce the reader to an area of science which of necessity must utilize a variety of disciplines. V.CHALAPATIRAO JOSEPH L. MELNICK v We humbly dedicate this volume to the cherished memory of our parents Contents Preface v 1 Introduction 1 References 9 2 Human enteric viruses in polluted water 10 Enteroviruses 10 Hepatitis A virus 11 Non-A, non-B hepatitis 12 Norwalk and Norwalk-like agents 12 Rotaviruses 13 Adenoviruses 13 Parvoviruses 14 Enteric viruses in the etiology of water-borne disease 14 Summary 16 References 16 3 Monitoring for viruses in wastewater and water 18 Why water should be monitored for viral contamination 18 Methods for monitoring viral contamination 19 Virus isolation from sewage, and surface and drinking water 25 Indicators for viruses 30 Standards for viruses in drinking water 32 Future developments in virus detection 33 Summary 38 References 39 4 Virus removal by treatment processes 41 Advanced waste treatment (tertiary treatment) 46 Disinfection 49 Summary 54 References 54

The study of viruses, or virology as it is now called, had its origin in 1892 when a Russian botanist, Iwanawsky, showed that sap from a tobacco plant with an infectious disease was still highly infectious after passage through a filter capable of retaining bacterial cells. From such humble beginnings the study of these 'filter-passing agents', or viruses, has developed into a separate science which rivals, if it does not excel, in importance the whole of bacteriology. The importance of viruses lies not only in the diseases they cause in every type of living organism, but also because of their intimate relationship with the living cell, in which alone they can reproduce. Their study has influenced the whole of biology by greatly increasing our knowledge of the gene, genetics, and molecular structure; there is also the possible connexion of viruses with human cancer, in view of the occurrence of many viral cancers in other animals. The book attempts to give a comprehensive but necessarily superficial survey of the subject as a whole and should help senior undergraduates and postgraduate students who wish to gain some knowledge of virology. Further information is available from the extensive bibliography.

Coronavirus Disease: From Origin to Outbreak provides a comprehensive review of coronaviruses, particularly COVID-19, its transmission, and disease pathology. The book covers the viral structure and genetics of coronaviruses, the pathogenesis and unique characteristics of coronavirus infection, and the evolving nature of our understanding of coronaviruses and disease. It also looks at the history of SARS-CoV and MERS-CoV infections and its global spread. The book examines the effectiveness of various preventive measures and new therapeutic agents that are either currently available or expected to available. Finally, it details the psychological and societal impact the virus and disease has in outbreak regions and what the financial impact an outbreak has on the healthcare system and local economies.