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
Animal welfare in Thailand Animal welfare in Thailand Animal welfare in Thailand relates to the treatment of animals in fields such as agriculture, hunting, medical testing and the domestic ownership of animals. It is distinct from animal conservation. Thailand introduced its first animal welfare law in 2014. The "Cruelty Prevention and Welfare of Animal Act, B.E. 2557 (2014)" came into being on 27 December 2014. Animals protected by the law are defined as those "raised as pets, as animals for work, as beasts of burden, as friends, as livestock, as performing show animals, or for any other purpose, no matter with or without owners".