Ovine pulmonary adenocarcinoma as an animal model for human lung cancer, because OPA is histologically similar to human adenocarcinoma in situ of the lung. Dolly the sheep, the first mammal successfully cloned from an adult somatic cell, was euthanized after it was confirmed that she had OPA. 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
Set animal the head of a donkey, it is possible the donkey was the inspiration for the Set animal. Others have speculated that it is a purely fantastic or composite animal, which never existed in nature; this was the opinion of Egyptologist E. A. Wallis Budge. Because the name "sha" is not as familiar as that of Set, and has no independent mythology associated with it, the animal is commonly referred to as "Set" or "Set animal" or the "Typhonian animal", so-called because the Greeks equated Set or Sutekh with the monster Typhon. Set animal In ancient Egyptian art, the Set animal,