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Ovine pulmonary adenocarcinoma (OPA), also known as ovine pulmonary adenomatosis, or jaagsiekte, is a chronic and contagious disease of the lungs of sheep and goats. OPA is caused by a retrovirus called jaagsiekte sheep retrovirus (JSRV).
JSRV is the virus that is the cause of the contagious lung tumors in sheep called ovine pulmonary adenocarcinoma (OPA). The disease has also been called "jaagsiekte", after the Afrikaans words for "chase" (jaag) and "sickness" (siekte), to describe the respiratory distress observed in an animal out of breath from being chased, indicating the breathing difficulty experienced by infected sheep.
Nairobi sheep disease orthonairovirus (NSDV) infection; orf, also known as contagious ecthyma, contagious pustular dermatitis, infectious labial dermatitis, thistle disease, sore mouth, or scabby mouth; ovine encephalomyelitis (louping ill) ovine progressive pneumonia (OPP) ovine pulmonary adenocarcinoma
The enzootic nasal tumor virus of the betaretrovirus genus is a carcinogenic retrovirus that causes enzootic nasal adenocarcinoma in sheep and goats. [1] Strain ENTV-1 is found in sheep and strain ENTV-2 is found in goats. [2] [3] The virus causes tumor growth in the upper nasal cavity and is closely related to JSRV which also causes ...
First described in 1954 by Bjorn Sigurdsson in Iceland, [6] Maedi-visna virus was the first lentivirus to be isolated and characterized, accomplished in 1957 by Sigurdsson. [6] [7] [8] Maedi (Icelandic mæði 'dyspnoea') and visna (Icelandic visna 'wasting' [9] or 'shrinking' of the spinal cord) refer to endemic sheep herd conditions that were only found to be related after Sigurdsson's work.
Enzootic nasal adenocarcinoma is a fatal, malignant neoplastic, infectious disease in sheep and goats. It is caused by the Enzootic nasal tumor virus, a retrovirus similar to Jaagsiekte sheep retrovirus, which causes a similar disease, also in sheep and goats called Ovine pulmonary adenocarcinoma (OPA). [1]
Mycoplasma ovipneumoniae is a species of Mycoplasma bacteria that most commonly inhabits and affects ovine animals, first described in 1972. [1] M. ovipneumoniae contributes to harmful pneumonia in sheep and goats. [1] The duration and severity of M. ovipneumoniae varies from region to region. [1]
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