maedi


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maedi/visna virus

a lentivirus that is the causal agent of a type of pneumonia in sheep.

maedi

a chronic pneumonia of sheep caused by a lentivirus, which also causes visna when it invades the brain of sheep. In maedi the characteristic features are a prolonged incubation period of more than 2 years, a progressive pneumonia which lasts for about 6 months, and, at the inevitable death, an abnormally high density and heaviness of the lungs. Called also maedi-visna, Graff-Reinert disease, la bouhite, ovine progressive pneumonia and lymphoid interstitial pneumonia.
References in periodicals archive ?
Visna presents with neurological symptoms, while Maedi exhibits in a respiratory form.
VETS from Scotland's Rural College are today appealing to sheep farmers across Wales and the UK to be alert to an increasing threat from an incurable viral disease of sheep, called Maedi Visna (MV) infection.
Vets from Scotland's Rural College claim that many farmers are failing to appreciate the danger that Maedi Visna (MV) poses to all sheep breeds.
Specialists say a high level of Maedi Visna (MV) infection has been found in some ocks and there is evidence of infection increasing throughout the sheep population, including Wales.
1997); and iii) viral diseases such as BLV-induced ovine lymphoma, Maedi Visna and pulmonary adenocarcinoma viral diseases (Aida, 2001; Konnai et al.
THE number of flocks infected with Maedi Visna (MV) has doubled in a 15-year period and farmers should be vigilant when bringing replacement ewes and rams on to their farms.
The ewes usually lamb in late April and May and are all Maedi Visna - MV - accredited, but this year they will be lambing in March.
Financing instrument : MAEDI, French Institute of Lebanon, operators
Maedi - meaning gasping or panting - is the most common form of the disease.
The Maedi Visna Section, judged by Richard Bulmer of Malton, North Yorkshire, will comprise a class for individual ram lambs on the Sunday evening at 5pm, and offers a first prize of pounds 100.
Maedi and visna are two manifestations of the same lentivirus infection.