Ovine pulmonary adenocarcinoma Ovine pulmonary adenocarcinoma 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). The disease has a long incubation period, and therefore signs usually occur in adult animals (over 2 years of age). Clinical signs resemble a non-specific progressive pneumonia, including poor body condition and, particularly after exercise, respiratory difficulty. Unless a concurrent lung infection is present, affected sheep continue to eat. The only sign specific to OPA is a watery nasal discharge, consisting
Animal rights movement idealistic and schismatic. These reform-oriented nonhuman rights organizations direct resources to countering abolitionist claims and blocking abolitionists' access to discursive spheres. Another example of counterframing from opposition movement actors is found in Switzerland's 1998 referendum cycle, in which antivivisectionists' claims that animal research should be abolished were contested with claims that mobilized the public more. Antivivisection claims, which framed animal research as facilitating the genetic engineering of foods in hopes of seizing on public fear of genetic engineering, were countered by scientists and animal researchers, who framed vivisection as medically necessary to ensure human well-being. Animal rights movement The animal