Nakatsuchi Ayumi, Matsumoto Yasunobu, Aida Yoko
Research and Development Section, Institute of Animal Health, JA Zen-Noh (National Federation of Agricultural Cooperative Associations), 7 Ohja-machi Sakura-shi, Chiba 285-0043, Japan.
Laboratory of Global Infectious Diseases Control Science, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
Vet Sci. 2023 Mar 27;10(4):250. doi: 10.3390/vetsci10040250.
Enzootic bovine leukosis caused by the bovine leukemia virus (BLV) results in substantial damage to the livestock industry; however, we lack an effective cure or vaccine. polymorphism in BLV-infected cattle is associated with the proviral load (PVL), infectivity in the blood, development of lymphoma, and in utero infection of calves. Additionally, it is related to the PVL, infectivity, and anti-BLV antibody levels in milk. However, the effects of the allele and BLV infection on dairy cattle productivity remain poorly understood. Therefore, we investigated the effect of BLV infection and allele polymorphism on dairy cattle productivity in 147 Holstein dams raised on Japanese dairy farms. Our findings suggested that BLV infection significantly increased milk yield. Furthermore, the allele alone, and the combined effect of BLV infection and the allele had no effect. These results indicate that on-farm breeding and selection of resistant cattle, or the preferential elimination of susceptible cattle, does not affect dairy cattle productivity. Additionally, BLV infection is more likely to affect dairy cattle productivity than polymorphism.
由牛白血病病毒（BLV）引起的地方流行性牛白血病给畜牧业造成了巨大损失；然而，我们缺乏有效的治疗方法或疫苗。BLV感染牛的基因多态性与前病毒载量（PVL）、血液中的传染性、淋巴瘤的发生以及犊牛的子宫内感染有关。此外，它还与牛奶中的PVL、传染性和抗BLV抗体水平有关。然而，该等位基因和BLV感染对奶牛生产力的影响仍知之甚少。因此，我们调查了BLV感染和该等位基因多态性对日本奶牛场饲养的147头荷斯坦奶牛母亲的生产力的影响。我们的研究结果表明，BLV感染显著提高了牛奶产量。此外，单独的该等位基因，以及BLV感染和该等位基因的联合作用均无影响。这些结果表明，农场内抗病牛的育种和选择，或优先淘汰易感牛，不会影响奶牛的生产力。此外，BLV感染比基因多态性更有可能影响奶牛的生产力。
Zotero 插件
