Jaagsiekte sheep retrovirus Jaagsiekte sheep retrovirus Jaagsiekte sheep retrovirus (JSRV) is a betaretrovirus which is the causative agent of a contagious lung cancer in sheep, called ovine pulmonary adenocarcinoma. JSRV is the virus that is the cause of the contagious lung tumors in sheep called ovine pulmonary adenocarcinoma (OPA). The disease has also been called "jaagsiekte", after the Afrikaans words for "chase" ("jaag") and "sickness" ("siekte"), to describe the respiratory distress observed in an animal out of breath from being chased, indicating the breathing difficulty experienced by infected sheep. Transmission of virus is through aerosol spread between sheep. The exogenous infectious form of
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