了解乳汁产量中乳腺炎的动态:解码乳腺炎发病和恢复模式,以应对乳腺炎的发生
A L L Sguizzato1, T E da Silva2, J C C Chagas3
1Department of Animal Science, Universidade Federal de Viçosa, Viçosa, Minas Gerais, 36570-900, Brazil.
JDS communications
|December 9, 2024
概括
乳腺炎甚至在症状出现之前就显著降低了每日牛奶产量 (MY),严重的病例导致更大的损失. 乳腺炎后的乳生产恢复可能需要长达25天.
科学领域:
- 乳制品科学 乳制品科学
- 动物卫生 动物健康
- 兽医流行病学 兽医流行病学
背景情况:
- 乳腺炎是奶牛的一个重要疾病,影响了牛奶的生产.
- 关于模拟乳腺炎发作之前和之后的每日牛奶损失的研究有限.
- 了解牛奶流失的时间和严重程度对于有效管理至关重要.
研究的目的:
- 为了建模乳腺炎对每日牛奶产量的影响.
- 根据乳腺炎的严重程度和发生时间来量化牛奶损失.
- 为了确定牛奶流失的持续时间和乳腺炎后的恢复期.
主要方法:
- 利用了11个奶牛场的3,508头奶牛的885,759个每日牛奶记录的数据集.
- 使用伍德曲线建模的牛奶产量和使用通用添加剂混合效应模型估计的剩余牛奶损失.
- 分析了乳腺炎诊断后15天前至30天的乳汁流失,考虑到乳腺炎的严重程度 (轻度与重度).
主要成果:
- 严重的乳腺炎 (2级) 与轻微的乳腺炎 (1级) 相比,导致牛奶产量 (MY) 降低,特别是在哺乳期峰值附近.
- 早期哺乳期乳腺炎 (在牛奶中80天) 导致平均损失为158升 (一级) 和288升 (二级).
- 乳腺炎发病前4-14天,乳生产开始下降,恢复需要15-25天.
结论:
- 乳腺炎显著影响牛奶产量,损失发生在诊断前和治疗后持续.
- 乳腺炎的严重程度和时间影响了牛奶产量减少的程度.
- 这项研究为了解和减轻奶牛养殖中与乳腺炎相关的经济损失提供了一个框架.
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