[Obtaining specific antigens of enzootic bovine leukemia virus]

The authors presented two methods of producing BLV antigens which had been proved and are utilized now at the Veterinary Institute in Pulawy. One of them is based on cultivation of blood leukocytes from leukotic cattle and on extraction of antigenic material with ethyl ether. The second method consists in obtaining antigenic proteins from a monolayer FLK-BLV culture by means of ammonium sulphate precipitation. The preparations obtained according to the above techniques showed specific serological properties and correspond with foreign standards.