Download or read book Expression of Recombinant Porcine Circovirus 2 PCV2 Capsid Polypeptides for Mapping Antibody Epitopes Following Vaccination Infection and Disease written by Benjamin R. Trible and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Open reading frame 2 (ORF2) of porcine circovirus type 2 (PCV2) codes for the 233 amino acid capsid protein (CP). Baculovirus-based vaccines that express only ORF2 are protective against clinical disease following experimental challenge or natural infection. The goal of this study was to identify regions in CP preferentially recognized by sera from experimentally infected and vaccinated pigs, and compare these responses to pigs diagnosed with porcine circovirus-associated disease (PCVAD). The approach was to react porcine sera with different CP polypeptide fragments that each contained one or more immunoreactive regions. Expression of polypeptides was performed using E.coli. Initial results showed that sera from vaccinated pigs preferentially recognized only the largest CP(43-233) polypeptide fragment and showed low levels of binding to other CP polypeptide fragments. The results of sera from pigs diagnosed with PMWS showed only minimal reactivity with CP polypeptide fragments, including the largest CP(43-233). PCV2 infected or PDNS diagnosed pigs reacted to all CP polypeptides: however, the strongest reactivity was primarily directed towards CP polypeptides containing residues in the 160-180 region. For this purpose, finer mapping studies were performed. These experiments involved reacting sera from experimentally infected PCV2 pigs and PDNS pigs with overlapping oligopeptides that covered amino acids 141-200. Overall, the results showed a subset of experimentally infected pigs and pigs with PDNS preferentially recognized the CP oligopeptide, 169-STIDYFQPNNKR-180. Alanine scanning identified Y-173, F-174, Q-175 and K-179 as important for antibody recognition. The results from this study support the notion of PCV2 modulation of immunity, including antibody responses that may represent a precursor for disease. The results from this study support the notion of PCV2 modulation of immunity. Furthermore, the methods incorporated in this study provide a means for characterizing the immune response upon vaccination, natural infection and disease.
Download or read book Characterization of the Antibody Response to Vaccination and Or Infection with Porcine Circovirus Type 2 and Identification and Characterization of a Decoy Epitope in the Capsid Protein written by Benjamin Ralph Trible and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chapter 1: Porcine circovirus-associated disease (PCVAD) encompasses a group of complex, multi-factorial syndromes, which are dependent on infection with porcine circovirus type 2 (PCV2). Current strains of PCV2 circulating in the field are phylogenically classified into two groups, termed PCV2a and 2b. Outbreaks of severe PCVAD in North America in 2005 are linked with a shift in the predominant circulating genotype, from PCV2a to PCV2b. Therefore genotype specific differences in pathogenesis and antigenicity have been suggested. Overall, evidence suggests pathogenicity is a function of the specific PCV2 isolate, regardless of genotype. In addition, only minor antigenic differences have been reported. In terms of immunopathogenisis, a genotypically conserved immune decoy epitope, located in the C-terminal region of the capsid protein, provides an explanation for the inability to identify pathogenic differences between genotypes. Finally, genetic variation of PCV2 and the resulting consequences with respect to vaccination and diagnostics is discussed. Chapter 2: Open reading frame 2 (ORF2) of porcine circovirus type 2 (PCV2) codes for the 233 amino acid capsid protein (CP). Baculovirus-based vaccines that express only ORF2 are protective against clinical disease following experimental challenge or natural infection. The goal of this study was to identify regions in CP preferentially recognized by sera from experimentally infected and vaccinated pigs, and compare these responses to pigs diagnosed with porcine circovirus-associated disease (PCVAD), including porcine multi-systemic wasting syndrome (PMWS) and porcine dermatitis and nephropathy syndrome (PDNS). The approach was to react porcine sera with CP polypeptide fragments followed by finer mapping studies using overlapping oligopeptides that covered amino acids 141-200. The results showed that vaccinated pigs preferentially recognized only the largest CP(43-233) polypeptide fragment. A subset of experimentally infected pigs and pigs with PDNS showed strong reactivity against a CP oligopeptide, 169-STIDYFQPNNKR-180. Alanine scanning identified Y-173, F-174, Q-175 and K-179 as important for antibody recognition. The results from this study support the notion of PCV2 modulation of immunity, including antibody responses that may represent a precursor for disease. The recognition of CP(169-180) and other polypeptides provide opportunities to devise diagnostic tests for monitoring the immunological effectiveness of vaccination. Chapter 3: Porcine circovirus associated disease (PCVAD) encompasses a group of syndromes linked to infection with porcine circovirus type 2 (PCV2). Based on the hypothesis that the immune response to vaccination versus infection are quantitatively and qualitatively different, the objective of this study was to evaluate immunity, virus replication and disease protection in pigs vaccinated with PCV2 capsid protein (CP) and natural infection. The disease model included dual infection with PCV2 and porcine reproductive and respiratory syndrome virus (PRRSV), a factor known to enhance disease progression and severity. The principal effect of PRRSV infection was to increase peak PCV2 viremia by almost 40-fold; however, PCV2 failed to show a reciprocal effect on PRRSV. In vaccinated pigs, there was no evidence of disease or PCV2 replication following dual virus challenge. Immunity following vaccination favored neutralizing antibody; whereas, PCV2 infection produced high levels of non-neutralizing antibody, primarily directed against a polypeptide in the C-terminal region of CP. These results support the notion that the magnitude of the total antibody response cannot be used as a measure of protective immunity. Furthermore, protection versus disease lies in the immunodominance of specific epitopes. Epitope specificity should be taken into consideration when designing PCV2 vaccines. Chapter 4: Porcine circovirus type 2 (PCV2) capsid protein (CP) is the only protein necessary for the formation of the virion capsid and recombinant CP spontaneously forms virus-like particles (VLPs). Located within a single CP subunit is an immunodominant epitope, CP(169-180), which is exposed on the surface of the subunit; but, in the structural context of the VLP, the epitope is buried and inaccessible to antibody. High levels of anti-CP(169-180) activity are associated with porcine circovirus-associated disease (PCVAD). The purpose of this study was to investigate the role of the immune response to monomer CP in the development of PCVAD. The approach was to immunize pigs with CP monomer followed by challenge with PCV2 and porcine reproductive and respiratory syndrome virus (PRRSV). To maintain the CP immunogen as a stable monomer, CP(43-233) was fused to ubiquitin (Ub-CP). Size exclusion chromatography showed that Ub-CP was present as a single 33 kDa protein. Pigs immunized with Ub-CP developed a strong antibody response to PCV2, including antibodies against CP(169-180). However, only low levels of virus neutralizing activity were detected and viremia was similar to non-immunized pigs. As a positive control, immunization with baculovirus-expressed CP (Bac-CP) resulted in high levels of virus neutralizing activity, low amounts of anti-CP(169-180) activity, and the absence of viremia in pigs following virus challenge. The data support the role of CP(169-180) as an immunological decoy and illustrate the importance of the structural form of the CP immunogen in determining the outcome following infection.
Download or read book Index Medicus written by and published by . This book was released on 2004 with total page 2036 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
Download or read book Recent Advances in Animal Virology written by Yashpal Singh Malik and published by Springer Nature. This book was released on 2019-11-14 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the prominence and implication of the viral diseases that are a major threat to animals around the globe. A number of these diseases have also shown links with human populations, which has implications for public health. This book offers detailed and up-to-date information on viral diseases in livestock and poultry that were and/or are still a problem. Including cutting-edge developments, it also highlights several landmark contributions in the field of virology from India. Additionally, the book features tables and figures showing important clinical data and recommendations, with references for further information. It also explores the economic impact of viral diseases for farmers and the livestock industry, providing several examples. Further, it presents the latest information on viral diseases in global context, with a focus on state-of-art, molecular tools for the development of diagnostics, prophylactics and therapeutics. Lastly, the book also describes the challenges posed by the emerging and transboundary viral infections and our preparedness to counter them.
Download or read book Artificial DNA written by Yury E. Khudyakov and published by CRC Press. This book was released on 2002-09-25 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combining elements of biochemistry, molecular biology, and immunology, artificial DNA can be employed in a number of scientific disciplines. Some of the varied applications include site-specific mutagenesis, hybridization, amplification, protein engineering, anti-sense technology, DNA vaccines, protein vaccines, recombinant antibodies, screening fo
Download or read book BioMEMS and Biomedical Nanotechnology written by Mihrimah Ozkan and published by Springer Science & Business Media. This book was released on 2007-04-03 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contributions reporting on fundamental and applied investigations of the material science, biochemistry, and physics of biomedical microdevices with applications to Genomics and Proteomics. Topics include gene expression profiling utilizing microarray technology; imaging and sensing for gene detection and use in DNA analysis; and coverage of advanced microfluidic devices and the Humane Genome Project.
Download or read book Veterinary Vaccines written by Samia Metwally and published by John Wiley & Sons. This book was released on 2021-04-01 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a concise and authoritative reference on the use of vaccines against diseases of livestock Compiled by Senior Animal Health Officers at The Food and Agriculture Organization of the United Nations, and with contributions from international leading experts, Veterinary Vaccines: Principles and Applications is a concise and authoritative reference featuring easily readable reviews of the latest research in vaccinology and vaccine immune response to pathogens of major economic impact to livestock. It covers advice and recommendations for vaccine production, quality control, and effective vaccination schemes including vaccine selection, specifications, vaccination programs, vaccine handling in the field, application, failures, and assessment of herd protection. In addition, the book presents discussions on the current status and potential future developments of vaccines and vaccination against selected transboundary animal diseases. Provides a clear and comprehensive guide on using veterinary vaccines to protect livestock from diseases Teaches the principles of vaccinology and vaccine immune response Highlights the vaccine production schemes and standards for quality control testing Offers easy-to-read reviews of the most current research on the subject Gives readers advice and recommendations on which vaccination schemes are most effective Discusses the today’s state of vaccines and vaccination against selected transboundary animal diseases as well as possible future developments in the field Veterinary Vaccines: Principles and Applications is an important resource for veterinary practitioners, animal health department officials, vaccine scientists, and veterinary students. It will also be of interest to professional associations and NGO active in livestock industry.
Download or read book Vaccine Delivery Strategies written by Guido Dietrich and published by Garland Science. This book was released on 2002-01 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by leading experts in the field, this book examines the current state of research of all the most important and modern vaccine delivery systems available to date. The immunological principles upon which these systems are based, their potential applications and current clinical status are detailed. Topics covered include: bacterial polysaccharide conjugate vaccines, virosomes and liposomes, bacterial ghosts, attenuated Salmonella and Shigella vaccines, vaccines against tumors, edible vaccines and much more. An essential text for all vaccinologists, microbiologists, health professionals, biotechnologists, and pharmaceutial companies.
Download or read book Vaccine Delivery Technology written by Blaine Pfeifer and published by Humana. This book was released on 2020-11-19 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume discusses the vaccine development process and the role delivery concepts contribute to a global goal of effective health outcomes. The chapters in this book cover a wide range of topics such as antigen discovery methods; genetic and protein antigen preparation; preparation of viral vaccines as VLPs; viral and non-viral gene delivery; needle-less or non-invasive delivery technology; vaccine storage; and vaccine administration and assessment. Written in the highly 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 laboratory protocols; and tips on troubleshooting and avoiding known pitfalls. Cutting-edge and practical, Vaccine Delivery Technology: Methods and Protocols is a valuable resource for both novice and expert researchers, in and outside the field, who would like to gain insight into the impactful field of vaccines. Chapter 7 is available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.
Download or read book Animal Origin Viral Zoonoses written by Yashpal Singh Malik and published by Springer Nature. This book was released on 2020-09-23 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the second volume in the series Livestock Diseases and Management, and reviews the importance and implications of animal origin viral zoonoses. It also highlights the specific etiology and epidemiology of these viral infections and discusses their various biological and mechanical transmission mechanisms. Further, the book reviews various measures for controlling viral zoonoses and examines novel therapeutic and prophylactic strategies. Discussing recent studies on the pathogenesis and host immune response to these infections, it underscores the importance of using vaccines against these viral diseases to reduce the risk of them being transmitted to humans.Lastly, it describes in detail the challenges posed by these viral infections and our readiness to face them.
Download or read book Lumpy Skin Disease written by Eeva S. M. Tuppurainen and published by Springer. This book was released on 2018-07-03 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive but concise overview on the economically important emerging cattle pox virus derived Lumpy Skin Disease, including the characteristics of causative agent, description of clinical signs in cattle, pathology and histopathology, immunity, geographical distribution, epidemiology and transmission pathways, control and eradication of the disease. In addition the recent developments in vaccination, mathematical modeling and risk assessment are discussed. Lumpy Skin Disease currently spreads aggressively across the Middle and Near East. The first incursion to the European Union territory occurred in Greece in autumn 2015. The book targets clinicians and field veterinarians in Lumpy Skin Disease affected regions, veterinary authorities as well as advanced students in veterinary medicine and virology.
Download or read book Diseases of Poultry written by and published by John Wiley & Sons. This book was released on 2019-11-19 with total page 1488 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most complete and definitive reference to all aspects of poultry diseases, Diseases of Poultry, Fourteenth Edition has been fully revised and updated to offer a comprehensive survey of current knowledge. Updates the definitive reference of poultry health and disease Provides more clinically relevant information on management of specific diseases, contributed by clinical poultry veterinarians Offers information on disease control in organic and antibiotic-free production Presents more concise, streamlined chapters for ease of use Incorporates advances in the field, from new diagnostic tools and information to changes brought about by the increasing globalization and the re-emergence of zoonotic pathogens
Download or read book Trends in Insect Molecular Biology and Biotechnology written by Dhiraj Kumar and published by Springer. This book was released on 2018-04-03 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview on the basics in insect molecular biology and presents the most recent developments in several fields such as insect genomics and proteomics, insect pathology and applications of insect derived compounds in modern research. The book aims to provide a common platform for the molecular entomologist to stimulate further research in insect molecular biology and biotechnology. Insects are one of the most versatile groups of the animal kingdom. Due to their large population sizes and adaptability since long they attract researchers’ interest as efficient resource for agricultural and biotechnological purposes. Several economically important insects such as Silkworms, Honey Bee, Lac and Drosophila or Termites were established as invertebrate model organisms. Starting with the era of genetic engineering, a broad range of molecular and genetic tools have been developed to study the molecular biology of these insects in detail and thus opened up a new horizon for multidisciplinary research. Nowadays, insect derived products are widely used in biomedical and biotechnology industries. The book targets researchers from both academia and industry, professors and graduate students working in molecular biology, biotechnology and entomology.
Download or read book Swine Disease Manual written by Eric J. Neumann and published by . This book was released on 2009 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Swine Disease Manual is an informative reference for students, instructors, practitioners, technicians, and anyone working in the swine industry. It provides a concise overview of most diseases and syndromes affecting swine, with diseases grouped by etiologic agent. The fourth edition has been completely revised and updated, and contains new information on clostridial disease, salmonellosis, porcine circovirus, and more! The book is 170 pages, indexed, and contains a section of tables that provide a quick overview of diseases affecting a single body system and aid in differential diagnosis. An excellent study guide for veterinary board examinations!--publisher website.
Download or read book The Bacteriophage and Its Behavior written by Félix D'Herelle and published by . This book was released on 1926 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 The Nidoviruses written by Stanley Perlman and published by Springer. This book was released on 2010-11-19 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is based on the 10th International Nidovirus Symposium: Towards Control of SARS and other Nidovirus Diseases. The volume includes articles by all of the major contributors to this burgeoning area of research which summarize the work presented at the meeting. This represents the only comprehensive book to cover this field in the last five years.
