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 Disease in Sheep

Author : Douglas Gray
File Size : 86.8 MB
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Maedi Visna Disease in France

Author : M. Remond
File Size : 26.23 MB
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Maedi visna Disease of Small Ruminants

Author : P. Russo
File Size : 27.70 MB
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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.

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

Maedi Visna

Author : Catherine E. Milne
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Method of Gel Immunodiffusion

Author : M. Remond
File Size : 52.81 MB
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Caprine Arthritis Encephalitis and Maedi Visna

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Features a chapter on Maedi-Cisna (MV), a disease of sheep, and caprine arthritis/encephalitis (CAE) of goats, from "The Manual of Standards for Diagnostic Tests and Vaccines," prepared by the Standards Commission of the World Organisation of Animal Health in Paris, France. Discusses various diagnostic techniques and vaccine requirements of MV and CAE.

Participation of Visna Maedi Virus in Respiratory Disease of Goats Serological Evidence and Pathogenicity

Author : B. Fiocre
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