| maedi | A chronic, progressive, contagious interstitial pneumonitis of sheep in Europe and the U.S. Caused by a "slow virus" (family Lentiviridae); it is now believed that maedi and visna are two histopathological and clinical manifestations of the same viral infection. Synonym: ovine progressive pneumonia. Origin: Icelandic, dyspnea (05 Mar 2000) |
|---|---|
| maedi virus | A retrovirus (subfamily Lentivirinae) that is the cause of maedi; it is very similar to the visna virus Synonym: medi virus, progressive pneumonia virus. (05 Mar 2000) |
| Visna maedi virus | <virology> A retrovirus of sheep and goats. A member of the lentivirus subfamily related to HIV. First identified in Iceland when it was introduced by sheep imported from Germany and causes two diseases the most common, maedi, is a pulmonary infection (maedi is Icelandic for shortness of breath) and when it infects the nervous system, visna, a paralysis similar to multiple sclerosis (visna is Icelandic for wasting). (18 Nov 1997) |
|---|---|
| visna-maedi virus | A species of lentivirus, subgenus ovine-caprine lentiviruses (lentiviruses, ovine-caprine), that can cause chronic pneumonia (maedi), mastitis, arthritis, and encephalomyelitis (visna) in sheep. Maedi is a progressive pneumonia of sheep which is similar to but not the same as jaagsiekte (pulmonary adenomatosis, ovine). Visna is a demyelinating leukoencephalomyelitis of sheep which is similar to but not the same as scrapie. (12 Dec 1998) |