Search results for: maedi-visna-and-related-diseases

Maedi Visna and Related Diseases

Author : G. Pétursson
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G. Petursson and Rikke Hoff-J0rgensen The concept of slow viral infections was first put forward in 1954 by Dr. Bjorn Sigurdsson, an Icelandic physician who had been studying some sheep diseases which were introduced into Iceland with the importation of a foreign breed of sheep in 1933. Sigurdsson's main criteria for defining slow infec tions were a very long initial period without clinical signs lasting months or even years following infection and a rather regular protracted, progres sive course, once clinical symptoms had appeared, usually ending in serious disease or death. Sigurdsson included in this list of slow infections maedi -visna, infectious adenomatosis of sheep, scrapie in sheep, Bittner's mam mary carcinoma and Gross' leukemia in mice. All of these diseases, except scrapie, are caused by retroviruses. The characteristics of slow infections as described above are of prac tical importance for epidemiology, diagnosis and control of these diseases. For many years the slow infections remained primarily a veterinary problem, mainly affecting sheep and goats in certain countries. In recent years, how ever, the human immunodeficiency virus (HIV) causing acquired immunodefici ency syndrome (AIDS), has suddenly appeared in many countries of the world and brought the slow infection concept forcefully to the attention of the medical profession. The disease problems and the economic effects of slow infections of sheep and goats are increasingly recognized in various coun tries. For the reasons stated above we feel that this book should be useful for veterinarians and physicians alike.

Maedi Visna and Related Diseases

Author : G. Pétursson
File Size : 31.17 MB
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G. Petursson and Rikke Hoff-J0rgensen The concept of slow viral infections was first put forward in 1954 by Dr. Bjorn Sigurdsson, an Icelandic physician who had been studying some sheep diseases which were introduced into Iceland with the importation of a foreign breed of sheep in 1933. Sigurdsson's main criteria for defining slow infec tions were a very long initial period without clinical signs lasting months or even years following infection and a rather regular protracted, progres sive course, once clinical symptoms had appeared, usually ending in serious disease or death. Sigurdsson included in this list of slow infections maedi -visna, infectious adenomatosis of sheep, scrapie in sheep, Bittner's mam mary carcinoma and Gross' leukemia in mice. All of these diseases, except scrapie, are caused by retroviruses. The characteristics of slow infections as described above are of prac tical importance for epidemiology, diagnosis and control of these diseases. For many years the slow infections remained primarily a veterinary problem, mainly affecting sheep and goats in certain countries. In recent years, how ever, the human immunodeficiency virus (HIV) causing acquired immunodefici ency syndrome (AIDS), has suddenly appeared in many countries of the world and brought the slow infection concept forcefully to the attention of the medical profession. The disease problems and the economic effects of slow infections of sheep and goats are increasingly recognized in various coun tries. For the reasons stated above we feel that this book should be useful for veterinarians and physicians alike.

Maedi Visna and Bacterial Infections in Sheep in Ethiopia

Author : Legesse K. Garedew
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Maedi-visna is a persistent viral disease of adult sheep caused by lentivirus infection. Maedi-visna is associated with progressive mononuclear cell inflammatory lesions in lungs, joints, udder and central nervous system. Maedi-visna virus persists and replicate in the presence of host specific immune response and cause immune mediated lesions in several organs and systems. It induces immunosuppresion by affecting macrophage activity thus predisposes for secondary infections. Among secondary infections, bacterial pathogens have drawn a series attention due to varied clinical manifestations, severity and emergency of resistant strains to a number of chemotherapeutic agents. Hence, there is a need to analyze the extent of involvement of different pathogenic bacteria agents in Maedi-visna so that appropriate control measure could be implemented. The most compelling evidence of infection is obtained by isolation and identification of causative agents. Accordingly, a detailed investigation undertaken to identify various bacterial isolates involved in Maedi-visna and to analyze their antibiogram pattern against chemotherapeutic agents in veterinary medicine practice are discussed

Jaagsiekte Sheep Retrovirus and Lung Cancer

Author : Hung Y. Fan
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Retroviruses have been of great importance to biomedical science for the past half century. Initially, studies on oncogenic animal retroviruses provided important insights into molecular processes in carcinogenesis – most notably the existence and mechanisms of action of oncogenes and proto-oncogenes. Moreover, several human diseases are caused by retroviruses, including AIDS, adult T-cell leukemia and the neurological disease HAM/TSP. The topic of this volume is a relatively unknown animal retrovirus, jaagsiekte sheep retrovirus, the causative agent of transmissible lung cancer in sheep –ovine pulmonary adenocarcinoma. The disease was first documented in South Africa in the 1800s, it has a wide geographical distribution, and it is of economic importance in high endemic regions. However, until very recently the nature of the etiologic agent was unclear, and relatively few laboratories actively studied the disease.

The Neurology of AIDS

Author : Howard E. Gendelman
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This book is a comprehensive textbook of the neurological, behavioural, motor, sensory, cognitive, psychiatric, developmental and basic research performed on HIV-1 infection of the nervous system. The contributors represent some of the foremost clinical and basic science investigators in the field of NeuroAIDS worldwide. Particular emphasis is placed on current thinking with regard to disease pathogenesis, patient care, and the prospects for the future.

Veterinary Microbiology Parasitology

Author : Robert W. Li
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Numerous pathogens affect animal health and wellbeing and production efficiency. These pathogens also have a considerable impact on social economics, food safety and security, and human health. Infectious diseases that originate from both domesticated animals and wildlife represent one of the greatest threats to human health. Recent studies show that domesticated species harbor approximately 84 times more zoonotic viruses than wild species. Eight of the top 10 mammalian species with the highest number of zoonotic viruses are domestic, such as pigs, cattle, and horses. Many animal parasites are also zoonotic, constituting an additional burden on human health. Furthermore, the rapid emergence and spread of drug-resistant pathogen strains pose new threats to animal and human health. Climate changes will undoubtedly alter the interactions between animals and between animals and humans, which will have a huge impact on the transmission rate of existing pathogens and the emergence of new pathogens or the reemergence of old pathogens. In this special collection, interactions of all major pathogen types, including viruses, bacteria, mites and flies, protozoans, and helminths, and their hosts, such as wild and companion animals and livestock species, are discussed. Further, anthelmintic activities of natural products are evaluated. The relevance and utility of cutting-edge tools, such as immunology, genomics and genetics, microbiome studies and metabolomics, and molecular epidemiology, in dissecting host-pathogen interactions are also discussed. This special collection provides a broad knowledge base that encourages dialogue across a wide distribution of the research community in veterinary microbiology and parasitology.

The Neurology of AIDS

Author : Howard E. Gendelman, MD
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From basic science to clinical care, to epidemiological disease patters, The Neurology of AIDS is the only complete textbook available on AIDS neurology and the only one comprehensive enough to stand alone in each segment of study in brain disorders affected by the human immunodeficiency virus. It is an indispensable resource for students, resident physicians, practicing physicians, and for researchers and experts in the HIV/AIDS field. Oxford Clinical Neuroscience is a comprehensive, cross-searchable collection of resources offering quick and easy access to eleven of Oxford University Press's prestigious neuroscience texts. Joining Oxford Medicine Online these resources offer students, specialists and clinical researchers the best quality content in an easy-to-access format.

Veterinary Medicine

Author : Otto M. Radostits
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The new 10th edition of this well-respected reference includes thoroughly revised and reviewed information with content on new diseases for the most up-to-date information on diseases effecting sheep, pigs, goats, horses, and cattle. Divided into two sections, General Medicine and Special Medicine, the book covers topics ranging from the clinical examination and manifestation of disease in organ systems to specific diseases of the large animal species. Includes important information essential to any large-animal veterinarian, especially those working with horses, cattle, sheep, pigs, or goats. User-friendly format allows the reader to quickly absorb key information. Quick review/synopsis sections for complex diseases make important information easy to find. Features content on major diseases of all countries, including foreign animal and emerging diseases. Completely revised chapters reflect the information from current literature. New chapters address diseases associated with prions and identify important emerging diseases. A new main author who is a recognized authority on internal medicine of ruminant species with extensive clinical experience and scientific publications brings his expertise to this important reference. Includes content from contributing authors who are international authorities on pig diseases, toxicological disease in animals, and diseases associated with artropod parasites. Several new illustrations and sonograms provide up-to-date visual aids for better understanding.

Hagan and Bruner s Microbiology and Infectious Diseases of Domestic Animals

Author : William Arthur Hagan
File Size : 44.85 MB
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Foreign Animal Diseases Report

Author :
File Size : 79.15 MB
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