IDEXX Leukosis Milk Screening is IDEXX’s enzyme immunoassay for the detection of antibodies directed against Enzootic Bovine Leukosis Virus (BLV) in bovine bulk tank milk. The test is based on the use of an ultrapurified virus lysate. It is standardized to detect the OIE standard serum E05 1/25,000 (100 milk samples in the pool) according to Council Directive 88/406/EEC and OIE description (chapter 2.4.11) and the ANSES equivalent serum LBE1.