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IDEXX Leukosis Serum X2 Ab Test

Enzootic Bovine Leukosis (EBL)/Bovine Leukemia Virus (BLV)

The IDEXX Leukosis Serum X2 Ab Test is an enzyme immunoassay for the detection of antibody to bovine leukemia virus (BLV) in individual serum and plasma and pools of up to 10 individual sera or plasma samples from cattle.

  • BLV antibody detection by antigens produced on new cell line
  • Very high specificity—reduces the need for verification
  • Excellent sensitivity—fulfills OIE prescriptions and EU directives
  • Detection of antibodies against viral proteins, including the highly immunogenic early-appearing glycoprotein gp51
  • Modern kit format—easy to use, with ready-for-use reagents
  • High sample throughput—automation saves time and cost
  • Easy data management—can be used with xChek software

* Availability / Distribution: Outside the U.S. 


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Test details


  • Serum or plasma samples
  • Monophasic kit

Part numbers and sizes

EBT1132T (10 plates/strips)

About Enzootic Bovine Leukosis (EBL)/Bovine Leukemia Virus (BLV)

Bovine leukemia virus (BLV) is a retrovirus that may cause lymphosarcoma in cattle. The virus resides in blood lymphocytes where circulating antibodies are unable to neutralize it. Therefore, once an animal is infected with BLV, it is infected for life.

BLV is economically significant to the producer because of premature culling or death as a result of lymphosarcoma. Another concern is the condemnation of carcasses at slaughter, which has a significant economic impact on the dairy and cattle industries. Losses from export restrictions are another economic concern of BLV infection. Countries that have bovine leukosis control programs require BLV-free certification prior to shipping cattle to their regions. Moreover, exporters of semen are under increasing pressure to ensure that their product is from a BLV-free animal in a BLV-free herd.

* Not all products are available and/or registered in every country.