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 People "Animal People News", which covered current events related to animal issues worldwide. The newspaper was retired in 2014 following a split within the board of directors, and in 2015 Animal People launched a new project, the Animal People Forum, an online magazine and social networking site for people interested in animal rights, welfare, and conservation. Kim Bartlett was hired as editor of "The Animals' Agenda" news magazine in August 1986, where Patrice Greanville was already associate editor. Merritt Clifton had been freelancing for "The Animals' Agenda", and was hired by Bartlett and Greanville as the feature writer in November 1986.