From: Bovine leukemia virus proviral load is more strongly associated with bovine major histocompatibility complex class II DRB3 polymorphism than with DQA1 polymorphism in Holstein cow in Japan
Category of proviral load
Low (≤ 10,000 copies/105 cells)
High (> 10,000 copies/105 cells)
Number of DRB3-DQA1 haplotype
BLV resistant*
544
1192
Non BLV resistant
62
22