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English* Bulgin E. and Preziuso S. contributed equally to this work. Leucomyelitis was the predominant feature in four North American adult sheep (cases 1–4) with ovine lentivirus (OvLV) infection. All four animals were OvLV-seropositive and a syncytogenic virus consistent with OvLV was isolated from the brain of case 3 and the lungs of case 4. Clinically, the sheep had dyspnoea and neurologic signs of varying severity. Changes in the central nervous system included asymmetrical meningoleucomyelitis with white matter degeneration in all four sheep and scattered foci of leucoencephalitis in periventricular, subependymal and other white matter areas of the brain of the three animals (cases 1, 2 and 4) for which the brain was examined. In the lungs of two sheep (cases 3 and 4), there was lymphoid interstitial pneumonia with marked lymphoid hyperplasia. The viral capsid antigen (p25) was detected by immunohistochemistry (IHC) in sections of lung, brain and spinal cord of the four sheep and OvLV RNA was detected by in-situ hybridization (ISH) in lung and spinal cord samples. The results confirm the usefulness of the IHC and ISH for differential diagnosis of visna.
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| Titolo: | Ovine lentivirus-associated leucomyelitis in naturally infected North American sheep. (*The first two authors contributed equally to this work) |
| Autori: | |
| Data di pubblicazione: | 2005 |
| Rivista: | |
| Abstract: | * Bulgin E. and Preziuso S. contributed equally to this work. Leucomyelitis was the predominant feature in four North American adult sheep (cases 1–4) with ovine lentivirus (OvLV) infection. All four animals were OvLV-seropositive and a syncytogenic virus consistent with OvLV was isolated from the brain of case 3 and the lungs of case 4. Clinically, the sheep had dyspnoea and neurologic signs of varying severity. Changes in the central nervous system included asymmetrical meningoleucomyelitis with white matter degeneration in all four sheep and scattered foci of leucoencephalitis in periventricular, subependymal and other white matter areas of the brain of the three animals (cases 1, 2 and 4) for which the brain was examined. In the lungs of two sheep (cases 3 and 4), there was lymphoid interstitial pneumonia with marked lymphoid hyperplasia. The viral capsid antigen (p25) was detected by immunohistochemistry (IHC) in sections of lung, brain and spinal cord of the four sheep and OvLV RNA was detected by in-situ hybridization (ISH) in lung and spinal cord samples. The results confirm the usefulness of the IHC and ISH for differential diagnosis of visna. |
| Handle: | http://hdl.handle.net/11581/115582 |
| Appare nelle tipologie: | Articolo |
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