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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.
The tumors have overactive secretory functions, which are a hallmark of OPA. [citation needed] The retroviral antigen levels of JSRV are very high in OPA tumors and can be detected in the lung secretions of infected sheep. It is thought that infected animals secrete the virus before showing signs, so the virus is easily spread within flocks.
Diseases caused by viruses include: Akabane virus infection; bluetongue disease; border disease (hairy shaker disease) Cache Valley virus infection; caprine arthritis encephalitis (CAE) enzootic nasal adenocarcinoma; foot-and-mouth disease; mastitis; Nairobi sheep disease orthonairovirus (NSDV) infection
The disease, enzootic nasal adenocarcinoma is common in North America and is found in sheep and goats on every continent except New Zealand and Australia. [5] There are more than 27 betaretroviruses similar to ENVT and JSRV in the ovine genome. [6] [7] In the future, research on ENTV may become important in studying viruses that cause human ...
Fasciola hepatica, also known as the common liver fluke or sheep liver fluke, is a parasitic trematode (fluke or flatworm, a type of helminth) of the class Trematoda, phylum Platyhelminthes. It infects the livers of various mammals , including humans, and is transmitted by sheep and cattle to humans all over the world.
Some examples of endogenous viruses that can infect and multiply in human cells are from baboons (BaEV), cats (RD114), and mice. [ 50 ] There are three different classes of PERVs, PERV-A, PERV-B, and PERV-C. PERV-A and PERV-B are polytropic and can infect human cells in vitro, while PERV-C is ecotropic and does not replicate on human cells.
The transmission of hepadnaviruses between their natural hosts, humans, non-human primates, and birds, including intra-species host transmission and cross-species transmission, is a topic of study in virology. Hepadnaviruses are a family of viruses that can cause liver infections in humans and animals.
Louping-ill (/ ˈ l aʊ p ɪ ŋ ɪ l /) is an acute viral disease primarily of sheep that is characterized by a biphasic fever, depression, ataxia, muscular incoordination, tremors, posterior paralysis, coma, and death.