Download or read book Evaluation of Mycoplasma Gallisepticum MG Bacterins in Chickens written by Elie K. Barbour and published by . This book was released on 1988 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Live and Killed Mycoplasma Gallisepticum Vaccinations Prior to an F strain M Gallisepticum Vaccine Overlay on the Performance Egg Blood and Visceral Characteristics of Commercial Layer Chickens written by Roy Jacob and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Mycoplasma gallisepticum (MG) is a major and economically significant pathogen of avian species. Different strains of MG have been used as vaccines in multiple-age commercial layer farms in an effort to protect the birds against more virulent field strains. The lower level of protection afforded by the low virulent MG strain vaccines provides an opportunity to the use of an overlay (revaccination) with an F-strain M. gallisepticum (FMG) later in their production cycles. In the present study, three trials were conducted to investigate the effects of prelay vaccinations of ts-11 strain MG, MG-Bacterin, or their combination, in conjunction with a FMG overlay after peak production in commercial layers. The following treatments were utilized at 10 wk of age (woa): 1) Control (no vaccinations); 2) ts-11 MG vaccine; 3) MG-Bacterin vaccine; and 4) ts-11 MG and MG-Bacterin combination. At 45 woa, all the birds in trial 1 and half of the birds in each treatment group in trials 2 and 3 were overlaid with an FMG vaccine. Various parameters including performance, internal egg and eggshell quality, blood, and visceral characteristics of the birds were evaluated.
Download or read book Further Vaccination Studies with a Temperature sensitive Mutant of Mycoplasma Gallisepticum and a Commercial Mycoplasma Gallisepticum Bacterin written by Kemal Karaca and published by . This book was released on 1987 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vaccination to Achieve Eradication of Mycoplasma Gallisepticum MG of Multiple Age Laying Farms of Chickens written by Jiroj Sasipreeyajan and published by . This book was released on 1987 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Global Transcriptional Analysis of the Chicken Tracheal Response to Virulent and Attenuated Vaccine Strains of Mycoplasma Gallisepticum written by Jessica Beaudet and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Chickens infected with Mycoplasma gallisepticum, the primary etiologic agent of chronic respiratory disease (CRD), present with significant respiratory complications. The host response is often immunopathogenic and contributes to increased tracheal thickness due to the chemotaxis of leukocytes, cellular damage at the mucosal surface, and the inability to clear the infection. The response to M. gallisepticum is complex and the differences that lead to a maladaptive versus beneficial response are poorly understood. To elucidate the extent of the host response to virulent and attenuated strains, we conducted next-generation sequencing on samples taken directly from the host’s tracheal mucosa after infection with either virulent Rlow, or laboratory attenuated vaccine strains Mg 7 or GT5. In the first study, transcriptional analysis of the host response to virulent Rlow over a 7-day infection was conducted on samples from days 1, 3, 5 and 7. Data indicated a rapid, pro-inflammatory response, identifying numerous genes involved in immune pathways that peaked 3 days post-infection, and a significant metabolic response observed on days 1 and 3. Further analysis revealed increased expression of host cell receptors that likely heightens their sensitivity to damage- and pathogen- associated molecular patterns and results in the production of cytokines and chemokines that recruit and activate immune cells. In the second study, comparative transcriptomics identified differences between the early host response to Rlow and laboratory vaccine strains, Mg 7 and GT5. Infection with these attenuated strains resulted in a dampened host response involving significantly fewer immune and metabolism-related genes, limited differential expression of host cell receptors, and decreased production of cytokines and chemokines. Future vaccines should aim to target immune genes active in Mg 7 and GT5 infection while avoiding those uniquely differential in Rlow infection to induce a protective, and durable adaptive response while avoiding immune-related exacerbation of disease.
Download or read book An Evaluation of the Molecular Epidemiology and Transmission of Avian Mycoplasma Genotypes in Commercial Poultry written by Natalie Kathleen Armour and published by . This book was released on 2014 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mycoplasma gallisepticum (MG) and M. synoviae (MS), the most pathogenic mycoplasmal pathogens of poultry, are both horizontally and vertically transmitted. Targeted sequencing of the 16S-23S rRNA intergenic spacer region (IGSR), mgc2, MGA_0319 and gapA genomic regions was used to develop a database of South African MG sequences, and to elucidate the molecular epidemiology of MG in South Africa. The sequences of the twelve unique MG genotypes identified were highly similar to the available live MG vaccines, necessitating a combination of IGSR and mgc2 sequencing for differentiation. Targeted genetic sequencing was instrumental in identifying previously reported cases of apparent reversion to virulence and vertical transmission of the live ts-11 vaccine in the state of Georgia. The egg transmission and pathogenicity of ts-11 vaccine and ts-11-like isolates from ts-11 vaccinated breeders (K6222B) and their broiler progeny (K6216D) were evaluated in this research. K6216D transmitted via the egg at an average rate of 4.0% in the third and fourth weeks post infection, while egg transmission of K6222B and ts-11 vaccine was not detected. K6216D and K6222B were significantly more virulent and invasive than ts-11 vaccine. These results provide the first conclusive evidence of transovarian transmission of an isolate of the ts-11 genotype. A severe outbreak of MS in the state of Arkansas prompted an investigation of the horizontal transmission of two MS isolates genotyped as S-10 and S-17 based on targeted genetic sequencing. MS transmission from infected seeder chickens was detected by real-time PCR at 6 weeks post infection in both the S-10 and S-17 groups; however, the transmission patterns differed, with S-10 transmitting to adjacent contact chickens and S-17 to fomite contact chickens, but not to fomite contacts medicated with tylosin. A novel infection model incorporating mucin was subsequently developed to evaluate the fomite transmission of MS. Low-level MS transmission from S-17-inoculated cotton fabric, and from S-10-inoculated plastic, cotton fabric and feather fomites to sexually mature broiler breeder chickens was detected by real-time PCR, but not by culture or serology, 3 weeks after fomite placement. These studies represent the first experimental evaluations of the horizontal transmission of MS in sexually mature chickens.
Download or read book Backyard Poultry Medicine and Surgery written by Cheryl B. Greenacre and published by John Wiley & Sons. This book was released on 2014-12-31 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: Backyard Poultry Medicine and Surgery is a practical resource offering guidance on developing diagnostic and treatment plans for individual companion poultry or small flocks. Organized by body system to aid in developing a differential diagnosis list for common presenting signs, the book provides all the information clinicians need to effectively treat backyard poultry. Written by experts from both the commercial poultry field and the companion avian field, the book provides thorough coverage of both common and less common diseases of backyard chickens, ducks, and other poultry. The book begins with introductory chapters covering general information, an overview of US laws, and basic husbandry concerns, then moves into specific disease chapters organized by system. The book takes an individual medicine perspective throughout, with photographs, radiographs, and histopathological photomicrographs to illustrate principles and diseases. Backyard Poultry Medicine and Surgery is an invaluable guide to diseases and treatments for any practitioners treating backyard poultry.
Download or read book Field Manual of Wildlife Diseases written by and published by Geological Survey (USGS). This book was released on 1999 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diseases of Poultry written by American Association of Avian Pathologists and published by Iowa State Press. This book was released on 1972 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uitgebreid diergeneeskundig handboek waarin vrijwel alle pluimveeziekten behandeld worden
Download or read book Broiler Breeder Production written by S. Leeson and published by Nottingham University Press. This book was released on 2010-04-01 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review of all aspects of commercial production systems, this book provides an up-to-date look at all aspects of broiler breeder production and management, starting with specialized genetic programs as developed by the primary breeders and ending with two chapters on very practical, hands-on aspects of breeder management, including extensive coverage of health management, feeding systems, environmental control, lighting programs and all aspects of male and female reproduction. Recognizing the diversity of management systems worldwide, the authors have included breeders in both temperate and warm climates and also for controlled environment vs.curtain-sided housing systems. This unique publication is an essential reference for all professionals involved in broiler breeder production.
Download or read book A Laboratory Manual for the Isolation Identification and Characterization of Avian Pathogens written by Louise Dufour-Zavala and published by . This book was released on 2008 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manual for the isolation, identification and characterization of avian pathogens
Download or read book Molecular Biology and Pathogenicity of Mycoplasmas written by Shmuel Razin and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: was the result of the efforts of Robert Cleverdon. The rapidly developing discipline of molecular biology and the rapidly expanding knowledge of the PPLO were brought together at this meeting. In addition to the PPLO specialists, the conference invited Julius Marmur to compare PPLO DNA to DNA of other organisms; David Garfinkel, who was one of the first to develop computer models of metabolism; Cyrus Levinthal to talk about coding; and Henry Quastler to discuss information theory constraints on very small cells. The conference was an announcement of the role of PPLO in the fundamental understanding of molecular biology. Looking back 40-some years to the Connecticut meeting, it was a rather bold enterprise. The meeting was international and inter-disciplinary and began a series of important collaborations with influences resonating down to the present. If I may be allowed a personal remark, it was where I first met Shmuel Razin, who has been a leading figure in the emerging mycoplasma research and a good friend. This present volume is in some ways the fulfillment of the promise of that early meeting. It is an example of the collaborative work of scientists in building an understanding of fundamental aspects of biology.
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 The Rasputin Effect When Commensals and Symbionts Become Parasitic written by Christon J. Hurst and published by Springer. This book was released on 2016-07-05 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume focuses on those instances when benign and even beneficial relationships between microbes and their hosts opportunistically change and become detrimental toward the host. It examines the triggering events which can factor into these changes, such as reduction in the host’s capacity for mounting an effective defensive response due to nutritional deprivation, coinfections and seemingly subtle environmental influences like the amounts of sunlight, temperature, and either water or air quality. The effects of environmental changes can be compounded when they necessitate a physical relocation of species, in turn changing the probability of encounter between microbe and host. The change also can result when pathogens, including virus species, either have modified the opportunist or attacked the host’s protective natural microflora. The authors discuss these opportunistic interactions and assess their outcomes in both aquatic as well as terrestrial ecosystems, highlighting the impact on plant, invertebrate and vertebrate hosts.
Download or read book Guide to Antimicrobial Use in Animals written by Luca Guardabassi and published by John Wiley & Sons. This book was released on 2009-01-22 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book to offer practical guidelines on the prudent andrational use of antimicrobials in animals. Drawing onmultidisciplinary expertise to offer independent scientific adviceon a controversial area that is crucial to both human health andanimal welfare. The earlier general chapters cover issues such ashuman health risks and the problems of resistance to antimicrobialdrugs. The later specific chapters are dedicated to particulargroups of animals. Has an emphasis on preserving the efficacy of antimicrobialdrugs that are clinically important in human medicine Covers both companion animals and food animals, includingaquaculture Suitable for veterinary practitioners working in small andlarge animal medicine, aquaculture and animal production, as wellas veterinary students, academics and researchers. It will also beof interest to those more generally involved in veterinary publichealth and antimicrobial resistance.
Download or read book Review Questions and Answers for Veterinary Technicians written by Thomas P. Colville and published by Elsevier Health Sciences. This book was released on 2014-06-03 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: With more than 5,000 practice questions in the book and online, Review Questions and Answers for Veterinary Technicians, 4th Edition - Revised Reprint prepares you for success on the Veterinary Technician National Exam (VTNE). Subject areas covered include: pharmacology, surgical preparation and assisting, dentistry, laboratory procedures, animal nursing, diagnostic imaging, and anesthesiology. A new Evolve website lets you answer questions in study mode, quiz mode, or as a VTNE-style, 200-question practice exam with instant feedback. Written by veterinary technology educator Thomas Colville, this engaging review gives you the practice and the confidence you need to master the VTNE. More than 5,000 review questions in the book prepare you to pass the VTNE by testing factual knowledge, reasoning skills, and clinical judgment in the seven primary subject areas of veterinary technology.Multiple-choice question format mirrors the format used in the VTNE.Answers include rationales for correct and incorrect answers, and are provided at the back of the book. NEW! An Evolve companion website contains 5,000 questions and a practice exam that simulates the computer-based VTNE testing environment, and provides instant feedback and a test score.
