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Concern over maedi visna breakdowns
Veterinary Record, 2014WE would like to raise our concerns with veterinary colleagues over an apparent increase in the number of flocks in the maedi visna (MV) accreditation scheme that have had a breakdown with MV infection. Most of the blood testing for the MV accreditation scheme takes place during the summer months; however, so far this year there have been nine ...
Catriona, Ritchie, Brian, Hosie
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Veterinary Record, 1987
In most cases, maedi-visna virus infection is characterised by a subclinical, persistent virus-carrier state. However, in heavily infected flocks, economically significant disease does occur, mainly apparent as ill-thrift and chronic respiratory disease (maedi) in older ewes and as an indurative mastitis, which can result in delayed weight gain of ...
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In most cases, maedi-visna virus infection is characterised by a subclinical, persistent virus-carrier state. However, in heavily infected flocks, economically significant disease does occur, mainly apparent as ill-thrift and chronic respiratory disease (maedi) in older ewes and as an indurative mastitis, which can result in delayed weight gain of ...
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Veterinary Record, 1980
A brief history of the occurrence of maedi/visna or maedi/visna related diseases is given. The clinical features and diagnosis are described. Recent experimental work performed in an attempt to resolve the pathogenetic features of slowness and persistence of infection, characteristic of maedi/visna, is covered.
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A brief history of the occurrence of maedi/visna or maedi/visna related diseases is given. The clinical features and diagnosis are described. Recent experimental work performed in an attempt to resolve the pathogenetic features of slowness and persistence of infection, characteristic of maedi/visna, is covered.
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Antigenic variation in visna virus
Cell, 1979Two antigenic variants of visna virus were isolated sequentially from a single sheep inoculated with a plaque-purified strain of virus designated 1514. The genetically stable variants, LV1-1 and LV1-4, are of two classes: LV1-1 is partially neutralized by antibody to the inoculum strain 1514, while LV1-4 is not neutralized by antibody to 1514.
J V, Scott +4 more
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1987
Visna, the prototype of slow infections (Sigurdsson, 1954), is a menin-goencephalitis of sheep, caused by a retrovirus (Petursson et al., 1979) which belongs to the group of lentiviruses and is related to the recently isolated human virus that causes AIDS (Sonigo et al., 1985).
G. Georgsson +2 more
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Visna, the prototype of slow infections (Sigurdsson, 1954), is a menin-goencephalitis of sheep, caused by a retrovirus (Petursson et al., 1979) which belongs to the group of lentiviruses and is related to the recently isolated human virus that causes AIDS (Sonigo et al., 1985).
G. Georgsson +2 more
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Infectivity of visna virus DNA
Virology, 1976Abstract Deoxyribonucleic acid isolated from cells infected with the RNA containing slow virus visna confers on uninfected cells the capacity to synthesize new virus. The cytopathic agent isolated in these experiments has the biological and biochemical properties of visna virus, and the active material is DNA by several criteria, the most important ...
A T, Haase +3 more
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Zentralblatt für Veterinärmedizin Reihe B, 2010
Zusammenfassung Es wurden 19 Ziegen untersucht, die aus einer Herde stamniten, in der die fur Visna des Schafes typischen zentralnervosen Storungen und pathologischhistologischen Veranderungen vorkamen. Bei der klinischen Untersuchung hatten die Ziegen Visna-Symptome wie zentralnervosbedingte Storungen mit Paresen und Paralysen, in der Nachhand ...
E. Weingold, B. Triemer
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Zusammenfassung Es wurden 19 Ziegen untersucht, die aus einer Herde stamniten, in der die fur Visna des Schafes typischen zentralnervosen Storungen und pathologischhistologischen Veranderungen vorkamen. Bei der klinischen Untersuchung hatten die Ziegen Visna-Symptome wie zentralnervosbedingte Storungen mit Paresen und Paralysen, in der Nachhand ...
E. Weingold, B. Triemer
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1979
In 1935 the first cases of a previously unknown paralytic disease were seen in older age-groups of sheep in a south-western region of Iceland (Fig l). From 1935-1952 cases were increasing causing considerable loss of sheep in the affected flocks (l, 2, 3).
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In 1935 the first cases of a previously unknown paralytic disease were seen in older age-groups of sheep in a south-western region of Iceland (Fig l). From 1935-1952 cases were increasing causing considerable loss of sheep in the affected flocks (l, 2, 3).
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