Jaagsiekte sheep retrovirus Jaagsiekte sheep retrovirus Jaagsiekte sheep retrovirus (JSRV) is a betaretrovirus which is the causative agent of a contagious lung cancer in sheep, called ovine pulmonary adenocarcinoma. 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. Transmission of virus is through aerosol spread between sheep. The exogenous infectious form of
Animal welfare in the United Kingdom Animal welfare in the United Kingdom Animal welfare in the United Kingdom relates to the treatment of animals in fields such as agriculture, hunting, medical testing and the domestic ownership of animals. It is distinct from animal conservation. The Animal Welfare Act 2006 is the latest animal welfare legislation in England and Wales. It superseded and consolidated more than 20 other pieces of legislation, such as the Protection of Animals Act 1934 and the Abandonment of Animals Act 1960. The 2006 Act introduced tougher penalties for neglect and cruelty, including fines of up to £20,000, a maximum jail term of