Ovine pulmonary adenocarcinoma be predisposed to OPA. Most affected sheep show signs at 2 to 4 years of age. OPA is not a notifiable disease, and therefore it is difficult to assess its prevalence. OPA was first described in the UK in 1888, and described in detail in South Africa in 1891. The disease was initially known as "jaagsiekte" , a word derived from Afrikaans, meaning "chasing sickness," so called because animals are in respiratory distress as if they are out of breath from being chased. It has also been known as sheep pulmonary adenomatosis and ovine pulmonary carcinoma. OPA has been used
Animal Hospital Animal Hospital Animal Hospital is a British television show starring Australian singer and TV presenter Rolf Harris that ran on BBC One from 1994 until 2004. The series featured animal welfare stories from many RSPCA hospitals, including Harmsworth Animal Hospital in North London. Harmsworth Animal Hospital in North London was the first of three RSPCA hospitals that opened their doors to allow the BBC to produce this factual television show which ran for over a decade. The programmes were presented by Rolf Harris. After Harmsworth, the series moved to the Putney Animal Hospital in South London, and then to Salford