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  • Title: A survey of bovine leukemia virus resistant bovine leukocyte antigen (BoLA)-DRB3*009:02 allele-carrying Japanese Black cattle in two prefectures in Japan.
    Author: Notsu K, Inoue Y, Masuda T, Inoue M, Mitoma S, Wu X, Norimine J, Sekiguchi S.
    Journal: J Vet Med Sci; 2022 Nov 01; 84(11):1457-1460. PubMed ID: 36171135.
    Abstract:
    The bovine leukocyte antigen (BoLA) DRB3*009:02 allele is strongly associated with a low/undetectable bovine leukemia virus (BLV) proviral load. Understanding the status of cattle possessing DRB3*009:02 allele is key for BLV control by breeding. We performed a survey of DRB3*009:02-carrying cattle in two prefectures in Japan using a TaqMan assay developed previously. The allele was found in 3.8% (confidence interval (CI): 3.3-4.3) of 6020 Japanese Black female cattle. A prefecture-level difference was found: the allele was observed in 8.6% CI: 7.5-9.9) of 2242 cattle of the birth prefecture B in Kyushu/Okinawa region, and this percentage was significantly higher than those of prefecture C in Kyushu/Okinawa region (1.3% (CI: 0.4-3.4) of 319) and prefecture A in Chugoku region (0.9% (CI: 0.6-1.4) of 2741), respectively. Consideration on the difference in possession of DRB3*009:02 allele is needed to establish the more efficient control strategy of BLV infection in Japanese Black cattle.
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