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
Alternatives to animal testing process, the EC will require full disclosure of study data, safety issues, and toxicological findings for all such additives. Within the EU animal welfare law (2010/63/EU), the principles of the 3Rs are invoked whenever toxicological test methods are necessary. Institutes and organizations that research or fund alternatives to animal testing include: International Cooperation on Alternative Test Methods (ICATM): On April 27, 2009 the United States, Canada, Japan and EU signed a memorandum of cooperation that could reduce the number of animals required for consumer product safety testing worldwide. The agreement will yield globally coordinated scientific recommendations on alternative toxicity testing