“Bovine Leukosis Virus”

  • A retrovirus that targets lymphocytes
  • Does not have clinical signs in most cattle, however 1-5% will develop lymphosarcomas which may cause enlarged lymph nodes, paralysis of hind limbs, weight loss and protruding eyeballs
  • Direct loss to producers may include, loss of life, cost of replacement, reduced reproduction and inability to export due to increased BLV control programs.
  • Primarily transmitted by blood. Use of common needles during vaccinations and possible rectal palpations may play a significant part in BLV contamination.