Download or read book Development and Improvement of Avian Influenza Vaccines in Turkeys written by Olufemi Olusegun Fatunmbi and published by . This book was released on 1991 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Avian Influenza Virus written by Erica Spackman and published by Springer Science & Business Media. This book was released on 2008-02-28 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the growing global fear of a major pandemic, avian influenza (AI) virus research has greatly increased in importance. In Avian Influenza Virus, an expert team of researchers and diagnosticians examine the fundamental, yet essential, virological methods for AI virus research and diagnostics as well as some of the newest molecular procedures currently used for basic and applied research. They present exciting, cutting-edge new methods that focus both on studying the virus itself and on work with avian hosts, an area greatly lacking in research.
Download or read book Vaccines for Pandemic Influenza written by Richard W Compans and published by Springer Science & Business Media. This book was released on 2009-09-18 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent years have seen unprecedented outbreaks of avian influenza A viruses. In particular, highly pathogenic H5N1 viruses have not only resulted in widespread outbreaks in domestic poultry, but have been transmitted to humans, resulting in numerous fatalities. The rapid expansion in their geographic distribution and the possibility that these viruses could acquire the ability to spread from person to person raises the risk that such a virus could cause a global pandemic with high morbidity and mortality. An effective influenza vaccine represents the best approach to prevent and control such an emerging pandemic. However, current influenza vaccines are directed at existing seasonal influenza viruses, which have little or no antigenic relationship to the highly pathogenic H5N1 strains. Concerns about pandemic preparedness have greatly stimulated research activities to develop eff- tive vaccines for pandemic influenza viruses, and to overcome the limitations inh- ent in current approaches to vaccine production and distribution. These limitations include the use of embryonated chicken eggs as the substrate for vaccine prod- tion, which is time-consuming and could involve potential biohazards in growth of new virus strains. Other limitations include the requirement that the current inac- vated influenza vaccines be administered using needles and syringes, requiring trained personnel, which could be a bottleneck when attempting to vaccinate large populations in mass campaigns. In addition, the current inactivated vaccines that are delivered by injection elicit limited protective immunity in the upper respiratory tract where the infection process is initiated.
Download or read book Development of Vaccines for Poultry Against H5 Avian Influenza Based on Turkey Herpesvirus Vector written by Atsushi Yasuda and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Avian influenza (AI) remains a major threat to public health as well as to the poultry industry. AI vaccines are considered a suitable tool to support AI control programs in combination with other control measures such as good biosecurity and monitoring programs. We constructed recombinant turkey herpesvirus (HVT) vector vaccines expressing the hemagglutinin gene of AI virus H5 subtype (rHVT-H5) and evaluated their characteristics and efficacy against AI. We found that the cytomegalovirus (CMV) promoter is the most suitable for expression of the hemagglutinin gene among three promoters we evaluated. The rHVT-H5 vaccine did not cause any adverse reactions and did not revert to virulence after passages in chicken. Finally, efficacy of the rHVT-H5 vaccine was evaluated. We demonstrated that it provided protection against diverse AI H5 viruses belonging to different clades and reduced virus shedding from the challenged chicken. We also proved that efficacy provided by the rHVT-H5 vaccine was not significantly affected by presence of maternally derived antibodies (MDA) against AI virus. Furthermore, the rHVT-H5 vaccine could be applicable to the differentiating infected from vaccinated animals (DIVA) strategy. In summary, we successfully developed a HVT vector AI vaccine that possesses features that could be beneficial to AI control.
Download or read book Study Toward the Development of Advanced Influenza Vaccines written by Leyi Wang and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: In this study, several strategies have been explored for the development of live attenuated and killed DIVA influenza vaccines. The NS1 protein of influenza A viruses, a virulence marker, is a good target to attenuate viruses in developing a live attenuated vaccine. Through passage in eggs, we found that several different NS1 truncation variants were generated from a parental non-stable virus strain, A/turkey/Oregon/71-delNS1 (H7N3). Based on the results from both in vitro and in vivo studies, naturally selected NS1 truncation variants are potentially live attenuated influenza vaccine candidates in poultry. With a large deletion in NS genes, those NS1 truncation variants have a low possibility to revert back to virulent viruses. We then checked feasibility of those NS1 truncation variants to be used for in ovo vaccination, and hatchability of vaccinated groups was significantly lower than that of PBS control group, indicating that NS1 truncation variants were not attenuated enough to be used for in ovo vaccination and there was a need for further attenuation. To improve hatchability of NS1 truncation variant vaccinated eggs, temperature sensitive (ts) mutation and HA substitution strategies were utilized. NS1 truncation variants containing ts mutations exhibited ts phenotype in vitro, but were not attenuated enough to improve hatchability of in ovo vaccination. We showed that HA substitution had different effect on hatchability of in ovo vaccination, and the hatchability of eggs inoculated with NS1 truncation variants of different HA subtypes was still significantly lower than PBS control group. Therefore, we explored a strategy of targeting non-conserved parts of non-coding regions (NCR) to attenuate NS1 truncation variant viruses. In vitro studies illustrated that even single nucleotide change in NCR of PA or PB1 segments could affect protein expression. In addition, it was found that mutations in NCR of PA segment alone or PA and PB1 combination affect virus replication. With more understanding of the role of NCR in virus replication cycle, we speculate targeting non-conserved parts of NCR to further attenuate NS1 truncation variants is feasible. Further study is needed to introduce those mutations involved in decreased virus replication into NS1 truncation variants for further attenuation. In the case of development of killed DIVA avian influenza vaccines, two strategies, NS1 protein and heterologous NA, were utilized to generate DIVA vaccines. In vivo study showed that both kinds of DIVA vaccines significantly reduced challenge virus shedding in the oviduct of breeder turkeys as well as trachea and cloaca of young and breeder turkeys compared to the non-vaccinated control group, which suggests proper vaccination could effectively prevent egg production drop and potential viral contamination of eggs in infected turkeys. In combination with DIVA serological tests, we expect the developed vaccines will be useful to control turkey H3N2 influenza.
Download or read book Avian Influenza in Human written by Chen Qiu and published by Springer. This book was released on 2022-06-16 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some avian influenza viruses can infect humans, cause disease, and even result in deaths. This book comprehensively and systematically presents the theory, diagnosis and clinical treatment of typical avian influenza viruses in human. The first chapters introduce the ethiology, epidemiology, clinical diagnosis and treatment of human avian influenza and complications. The following chapters include overview, extensive images, differential diagnosis and clinical cases of H7N9, H5N1, H5N6, H10N8, H9N2 and H7N4 avian influenza. Written by practitioners directly involved in the prevention and clinical treatment of human avian influenza, it will be an invaluable aid for practitioners in centers for infectious disease control and prevention, hospitals, and academic institutions to improve prevention, diagnosis and treatment of avian influenza in human.
Download or read book Avian Influenza written by David E. Swayne and published by John Wiley & Sons. This book was released on 2009-03-03 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avian Influenza provides the first comprehensive guide covering the full spectrum of this complex and increasingly high-profile disease, its history and its treatment and control. All aspects of avian influenza are dealt with in depth, systematically covering biology, virology, diagnostics, ecology, epidemiology, clinical medicine, and the control. The book fuses coverage of the latest discoveries in the basic sciences with a practical approach to dealing with the disease in a clinical setting, and providing instruction and guidance for veterinarians and government animal health officials encountering this disease in the field. Avian Influenza provides the reader with a global perspective, bringing together chapters written by leading animal health researchers and veterinarians with significant experience working with this disease. Providing a summary and synthesis of important data and research on this virus, its impact on both wild and domesticated birds, and approaches to controlling the spread of the disease, Avian Influenza will be an invaluable resource for all veterinarians, scientists, animal health professionals, and public health officials dealing with this virus. * Covers full range of topics within avian influenza in one comprehensive and authoritative text * Provides a summarization of peer-reviewed and empirical data on avian influenza viruses, the infection and diseases they cause * Discusses strategies used in control of the disease * Leading experts are drawn together to provide an international and multi-disciplinary perspective * Fuses latest developments in basic scientific research with practical guidance on management of the disease
Download or read book Animal Influenza written by David E. Swayne and published by John Wiley & Sons. This book was released on 2016-10-14 with total page 755 pages. Available in PDF, EPUB and Kindle. Book excerpt: Animal Influenza, Second Edition is a comprehensive text on animal influenza. Organized by species, coverage includes avian, swine, equine and mammals, with each section including data on influenza viruses, the infection and disease they cause, and strategies used in control. Covers the full range of topics within avian, swine, equine and mammalian influenzas in one comprehensive and authoritative text Provides a summarization of peer-reviewed and empirical data on influenza viruses, the infection, and diseases they cause Discusses strategies used in control of the disease Leading experts are drawn together to provide an international and multi-disciplinary perspective Fuses latest developments in basic scientific research with practical guidance on management of the disease
Download or read book Animal Influenza Virus written by Erica Spackman and published by Humana. This book was released on 2016-08-23 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avian Influenza Virus, Second Edition aims to provide the essential methods used in working with animal influenza viruses, and to compile more advanced information that will guide the user in designing influenza studies. Influenza A viruses are among the most important pathogens for humans, food animals and companion animals. Research and diagnostics with animal influenza viruses are critical to animal health and it should be recognized that the needs and goals of animal agriculture and veterinary medicine are not always the same as those of public health. This volume sorts out the differences in the structure of the poultry, swine and equine industries, the biological differences of influenza virus from each animal group, and provides host, strain and lineage specific guidance and procedures. Written in the successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible protocols, and notes on troubleshooting and avoiding known pitfalls. Authoritative and accessible, Avian Influenza Virus, Second Edition seeks to serve both professionals and novices with its well-honed methodologies in an effort to further our knowledge of these important pathogens.
Download or read book Emerging Viral Diseases written by Institute of Medicine and published by National Academies Press. This book was released on 2015-03-19 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past half century, deadly disease outbreaks caused by novel viruses of animal origin - Nipah virus in Malaysia, Hendra virus in Australia, Hantavirus in the United States, Ebola virus in Africa, along with HIV (human immunodeficiency virus), several influenza subtypes, and the SARS (sudden acute respiratory syndrome) and MERS (Middle East respiratory syndrome) coronaviruses - have underscored the urgency of understanding factors influencing viral disease emergence and spread. Emerging Viral Diseases is the summary of a public workshop hosted in March 2014 to examine factors driving the appearance, establishment, and spread of emerging, re-emerging and novel viral diseases; the global health and economic impacts of recently emerging and novel viral diseases in humans; and the scientific and policy approaches to improving domestic and international capacity to detect and respond to global outbreaks of infectious disease. This report is a record of the presentations and discussion of the event.
Download or read book Avian Influenza and Newcastle Disease written by Illaria Capua and published by Springer Science & Business Media. This book was released on 2009-06-24 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avian Influenza (AI) and Newcastle Disease (ND) are two devastating diseases of poultry, which cause losses to the poultry industry and influence the liveability of rural communities worldwide. Following the H5N1 epidemic they appear to be endemic at least in Asia, Eastern Europe, The Middle East and Africa. Particularly in case of AI outbreaks it is essential that infection is diagnosed promptly and that isolates are made available to the international scientific community. Currently, several organisations including OIE, FAO and the EC have organised training courses in affected areas. However, often these courses do not cover all aspects of AI/ND diagnosis but only certain aspects. This results in fragmented areas of knowledge and in the application of different diagnostic protocols in different parts of the world. The objective of this book is to provide a comprehensive approach to AI diagnosis ranging from the clinical elements that should trigger a suspicion in the field, to the post mortem technique, collection of samples, processing/ shipment of specimens, virological, serological and molecular diagnosis and guidelines for notification.
Download or read book Newcastle Disease Vaccines written by William Hendry Allan and published by Nicholson. This book was released on 1978 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Learning from SARS written by Institute of Medicine and published by National Academies Press. This book was released on 2004-04-26 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: The emergence of severe acute respiratory syndrome (SARS) in late 2002 and 2003 challenged the global public health community to confront a novel epidemic that spread rapidly from its origins in southern China until it had reached more than 25 other countries within a matter of months. In addition to the number of patients infected with the SARS virus, the disease had profound economic and political repercussions in many of the affected regions. Recent reports of isolated new SARS cases and a fear that the disease could reemerge and spread have put public health officials on high alert for any indications of possible new outbreaks. This report examines the response to SARS by public health systems in individual countries, the biology of the SARS coronavirus and related coronaviruses in animals, the economic and political fallout of the SARS epidemic, quarantine law and other public health measures that apply to combating infectious diseases, and the role of international organizations and scientific cooperation in halting the spread of SARS. The report provides an illuminating survey of findings from the epidemic, along with an assessment of what might be needed in order to contain any future outbreaks of SARS or other emerging infections.
Download or read book Avian Influenza written by Remco S. Schrijver and published by Springer Science & Business Media. This book was released on 2005-08-05 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Avian Influenza poses a looming threat for human and animal health. The old paradigm was that the disease in waterfowl, poultry, pigs and man was caused by separate viruses that stayed within their own niche. Deadly outbreaks have shattered this view. This timely reference examines such sensitive issues as regulation of low pathogenic and high pathogenic AI, surveillance of waterfowl, live bird markets, and outbreak control in densely populated areas.
Download or read book Avian Immunology written by Bernd Kaspers and published by Academic Press. This book was released on 2012-12-02 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of Avian Immunology provides an up-to-date overview of the current knowledge of avian immunology. From the ontogeny of the avian immune system to practical application in vaccinology, the book encompasses all aspects of innate and adaptive immunity in chickens. In addition, chapters are devoted to the immunology of other commercially important species such as turkeys and ducks, and to ecoimmunology summarizing the knowledge of immune responses in free-living birds often in relation to reproductive success. The book contains a detailed description of the avian innate immune system, encompassing the mucosal, enteric, respiratory and reproductive systems. The diseases and disorders it covers include immunodepressive diseases and immune evasion, autoimmune diseases, and tumors of the immune system. Practical aspects of vaccination are examined as well. Extensive appendices summarize resources for scientists including cell lines, inbred chicken lines, cytokines, chemokines, and monoclonal antibodies. The world-wide importance of poultry protein for the human diet, as well as the threat of avian influenza pandemics like H5N1 and heavy reliance on vaccination to protect commercial flocks makes this book a vital resource. This book provides crucial information not only for poultry health professionals and avian biologists, but also for comparative and veterinary immunologists, graduate students and veterinary students with an interest in avian immunology. With contributions from 33 of the foremost international experts in the field, this book provides the most up-to-date review of avian immunology so far Contains a detailed description of the avian innate immune system reviewing constitutive barriers, chemical and cellular responses; it includes a comprehensive review of avian Toll-like receptors Contains a wide-ranging review of the "ecoimmunology" of free-living avian species, as applied to studies of population dynamics, and reviews methods and resources available for carrying out such research
Download or read book The National Poultry Improvement Plan written by and published by . This book was released on 1941 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Viruses and Viral Infections in Developing Countries written by Snežana Jovanović-Ćupić and published by BoD – Books on Demand. This book was released on 2020-06-17 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains information on various virus families, with the focus on viruses causing prevalent infections in parts of developing countries in Africa and Asia. Viral proteins play an important role in their replication and infection potential, and are the main candidates for antiviral therapy and vaccines. While some antiviral vaccines are available for quite some time (e.g. MMR), there are regions in the world still struggling with some infections. This is especially the problem in regions where the morbidity rate from viral infections among young children is high. This situation requires urgent measures to put infections under control.
