The IDEXX Leukosis Milk Verification Ab Test detects all types of antibodies against the bovine leukosis virus (BLV) in bovine 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).