在感染牛白血病病毒且患有持续性淋巴细胞增多症的荷斯坦奶牛中，牛奶和脂肪产量会下降。
Milk and fat yields decline in bovine leukemia virus-infected Holstein cattle with persistent lymphocytosis.
作者信息
Da Y, Shanks R D, Stewart J A, Lewin H A
机构信息
Department of Animal Sciences, University of Illinois, Urbana-Champaign 61801.
出版信息
Proc Natl Acad Sci U S A. 1993 Jul 15;90(14):6538-41. doi: 10.1073/pnas.90.14.6538.
Abstract
Effects of bovine leukemia virus (BLV) infection on milk and fat yields were studied by using data collected from Holstein cows over a 6-year period. Milk and fat yields in BLV-infected cows with persistent lymphocytosis (PL) declined significantly relative to their BLV-infected non-PL herdmates. Declines were most pronounced in cows older than 6 years. The estimated loss to the dairy industry due to PL is more than $42 million annually. A major histocompatibility complex class I (BoLA-A) allele that has been previously associated with resistance to PL was associated with longevity and realization of milk production potentials, indicating that genetic resistance to PL will have an economic benefit in herds where BLV is endemic.
摘要
通过使用从荷斯坦奶牛收集的6年数据，研究了牛白血病病毒（BLV）感染对产奶量和产脂量的影响。与感染BLV但无持续性淋巴细胞增多症（PL）的同群奶牛相比，感染BLV且患有PL的奶牛的产奶量和产脂量显著下降。这种下降在6岁以上的奶牛中最为明显。由于PL，乳业每年估计损失超过4200万美元。先前与对PL的抗性相关的主要组织相容性复合体I类（BoLA-A）等位基因与长寿和产奶潜力的实现有关，这表明对PL的遗传抗性在BLV流行的牛群中将具有经济效益。
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