Studies on enzootic bovine leukosis - (1) - The changes of antibodies against bovine leukemia virus and peripheral blood lymphocyte on Holstein cattle in a dairy farm

antibodies anticorps anticuerpos blood bovin laitier bovine leukosis dairy cattle endemia endemics endemie ganado de leche immunodiffusion tests leucocitos leucocyte leucose bovine leucosis bovina leukocytes linfocitos lymphocyte lymphocytes retroviridae sang sangre technique d'immunodiffusion