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
Funny animal Funny animal A funny animal is an anthropomorphic animal character who lives like a human. Funny animals typically are bipedal, wear clothes, live in houses, drive and ride vehicles, and have jobs or may even be recognized citizens of countries, which distinguish them from other animal characters who may nonetheless display anthropomorphic characteristics such as speaking or showing facial expressions. Funny animal (also talking animal) is also the genre of comics and animated cartoons which primarily feature funny animals. While many funny animal stories are light-hearted and humorous, the genre is not exclusively comedic. Dark or serious stories featuring characters