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
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,