优化泽西小牛的呼吸道疫苗接种策略:时间的影响和母体抗体干扰的影响
Mooyoung Jung1, Tai-Young Hur1, Chan-Lan Kim1
1Dairy Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Republic of korea.
Veterinary immunology and immunopathology
|April 5, 2025
概括
对泽西小牛的最佳呼吸道疫苗接种包括在14-18周之间进行初级免疫接种,两周后进行增强免疫接种. 接种疫苗时低水平的母体抗体增强了对牛感染性鼻炎 (IBR) 的长期免疫力,并影响了牛病毒性腹 (BVD) 的反应.
科学领域:
- 兽医免疫学 兽医免疫学
- 动物健康管理 动物健康管理
背景情况:
- 牛呼吸道疾病 (BRD) 造成了牛行业的重大经济损失和福利问题.
- 有效的疫苗接种策略对于管理BRD至关重要,但考虑到年龄和母体抗体的最佳时机需要进一步调查.
研究的目的:
- 确定Jersey小牛的最佳疫苗接种时间,以增强对BRD病原体的免疫力.
- 为了评估母体抗体干扰对年轻小牛疫苗接种反应的影响.
主要方法:
- 根据年龄 (14-20周) 和母体感染性牛鼻炎 (IBR) 抗体水平,25只泽西牛犊被分配到接种疫苗的组.
- 血液样本在多个时间点 (8,14,24,52周) 收集,以测量IBR和牛病毒性腹 (BVD) 抗体标位.
- 评估了疫苗接种策略对随着时间的推移对血清学反应的影响.
主要成果:
- 考虑到母亲IBR抗体水平的疫苗接种时间改善了长期IBR免疫力,并影响了BVD免疫力.
- 接种了IBR病毒阴性疫苗的小牛在52周时表现出较高的血清阳性,与接种了病毒阳性疫苗的小牛相比.
- 接种疫苗时母亲的低抗IBR抗体水平与52周的抗体水平增加有关.
结论:
- 泽西牛犊的最佳疫苗接种策略包括在14至18周之间进行一次初级疫苗接种,然后在两周后进行一次强化学剂接种.
- 接种低母IBR抗体水平的小牛疫苗可能会导致更强大和持久的免疫力.
- 这些发现支持量身定制的疫苗接种方案,以改善泽西牛的BRD管理.
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