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
Title (animal) awarded under. Both prefixed and appended titles are represented in Morghem's .500 Nitro Express's fully titled name CA UWP URO1 CH USJ 'PR' Morghem's .500 Nitro Express CGC TT. Title (animal) In animal husbandry and animal fancy, animals can compete in various shows and sports for titles signifying excellence. These titles vary depending on the species of the animal, the kind of show, and the country the event is held in. Dogs competing in conformation shows are eligible to win two titles. The first is best of breed, which signifies that a given animal is the best of its breed