Results 211 to 220 of about 7,818 (252)

Cross-Sectional Study Assessing Management Practices and Udder Health in California Sheep Flocks and Seroprevalence of Small Ruminant Lentivirus. [PDF]

Animals (Basel)
Digianantonio R, Pires AFA, Busch R.
europepmc   +1 more source

Inactivated Flagellin-Containing Vaccine Efficacy against Ovine Enzootic Abortion. [PDF]

Pathogens
Kruglova M, Nikitin N, Evtushenko E, Matveeva I, Mazurov A, Pavlenko I, Popova V, Bogomolova O, Vasilyev S, Markova E, Fedorov Y.   +10 more
europepmc   +1 more source

Characterization of visna virus mRNA [PDF]

Journal of Virology, 1979
Visna virus is a retrovirus responsible for a classical slow infection of the central nervous system of sheep. In the present work we focused our attention on the viral mRNA's. We found that, during the acute infection in vitro, (i) viral mRNA's amount to only 0.1% of the total cytoplasmic RNA, (ii) 20% of the total cytoplasmic viral RNA is found in ...
P Filippi, J Tamalet, Michel Brahic, R Vigne   +3 more
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The ultrastructure of early visna lesions [PDF]

Acta Neuropathologica, 1977
The ultrastructure of visna, a slowly progressive menigo-encephalomyelitis of sheep, was studied in animals sacrificed one month after intracerebral inoculation of visna virus. The major pathological changes, representative of those seen during the first year after infection, consist of inflammation and minor focal destructive lesions of grey and white
Páll A. Pálsson, Páll A. Pálsson, G. Pétursson, G. Pétursson, Gudmundur Georgsson, Gudmundur Georgsson, Neal Nathanson, Neal Nathanson, Hillel S. Panitch, Hillel S. Panitch   +9 more
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Resistance of Visna Virus to Interferon

Journal of Infectious Diseases, 1978
Visna is a slow infection of sheep caused by a retrovirus. The persistence of virus despite the immune response of the host is best explained by restricted genetic expression of the virus and consequently prolonged periods of residence inside cells.
P. Ventura, J. C. Overall, D. Carroll, A. Haase, C. R. Rinaldo, L. A. Glasgow   +5 more
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Pathogenesis of Visna

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. Pétursson, P. A. Pálsson, Gudmundur Georgsson   +2 more
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Pathogenesis of maedi-visna

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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Visna Virus Infection of American Lambs [PDF]

Science, 1974
Random-bred fetal and 4-week-old American lambs, inoculated intracerebrally with visna virus, developed a persistent infection in the brain and sometimes in the lung. The pathologic changes present in these lambs were similar to the early lesions of visna in Icelandic sheep, thus providing a possible model for the study of virus-induced demyelinating ...
Richard T. Johnson, Arthur M. Silverstein, Donald L. Price, Opendra Narayan   +3 more
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Maedi/visna: a review

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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