Circulating cytotoxic T lymphocyte precursors in maedi-visna virus-infected sheep

Maedi-visna virus infection in sheep: a review.

The maedi-visna virus (MVV) is classified as a lentivirus of the retroviridae family. The genome of MVV includes three genes: gag, which encodes for group-specific antigens; pol, which encodes for reverse transcriptase, integrase, RNAse H, protease and dUTPase and env, the gene encoding for the surface glycoprotein responsible for receptor binding and entry of the virus into its host cell. In a...

Extensive rearing hinders Maedi-Visna Virus (MVV) infection in sheep.

Maedi-Visna Virus (MVV) seroprevalence and its relationship with housing and mode of rearing of replacement ewe-lambs was investigated in 38 non-randomly selected sheep-flocks in Spain. They included extensive lamb-producing Manchega cross-bred flocks raised almost permanently at pasture, semi-intensive Latxa dairy flocks housed 2-8 months/year and intensively raised Assaf dairy flocks housed m...

Isolation of Maedi/Visna Virus from a Sheep in Japan

Maedi/visna (MV) is a lentiviral disease of sheep caused by the maedi/visna virus (MVV). Although MV is prevalent in many countries, it had not been reported in Japan. In 2011, however, three sheep in northern Japan were reported to be seropositive against the MVV antigen, indicating a persistent MVV infection. In the present study, we isolated MVV from one sheep to confirm MVV infection and co...

Lentivirus-induced interstitial lung disease: pulmonary pathology in sheep naturally infected by the visna-maedi virus.

Visna-maedi virus is a lentivirus that causes a chronic disease in sheep affecting, among other organs, the lungs. Interstitial pneumonitis is similar to that in man associated with the infection by the human immunodeficiency virus type-1. We have compared the pathological features of lungs of sheep naturally infected with visna-maedi virus with the results obtained from bronchoalveolar lavage ...

Serological study of Maedi-Visna virus among sheep flocks in Kerman province of Iran