在野外条件下,卵内疫苗接种时间对 brojler 性能参数的影响
Felipe Lino Kroetz Neto1, Leandro Giacobelli Cosmo2, Paulo Roberto Guimarães2
1Aviagen America Latina Ltda, Campinas, SP 13100-005, Brazil; Study Group for Avian Multiplication - GEMA, Department of Animal Reproduction, College of Veterinary Medicine and Animal Sciences, University of São Paulo, Pirassununga 13635-900, Brazil.
Poultry science
|March 28, 2024
概括
将卵内疫苗接种时间优化到460小时的化时间,可显著改善肉的体重增加和料转化. 这种时机最大限度地提高了Ross308AP雄性肉的遗传潜力,以获得更好的表现.
科学领域:
- 禽畜科学 禽畜科学 禽畜科学
- 动物养殖 动物养殖
- 接种疫苗的技术技术
背景情况:
- 化场的性能通常由化能力,死亡率和成本来评估.
- 评估的质量和化后的表现可以更全面地了解肉的潜力.
- 有效的卵内疫苗接种需要精确的时间安排,以获得最佳的免疫系统支持.
研究的目的:
- 评估卵内疫苗接种时间对雄性Ross308AP肉的性能参数的影响.
- 确定最优的化时间用于卵内疫苗接种,以提高 brojler 的生长和效率.
- 分析疫苗接种时间的影响,以及其他因素,如育种群体年龄和屠宰年龄.
主要方法:
- 在标准化条件下分析了3722只肉群的生产数据.
- 使用四种线性模型来评估平均体重 (MW),体重增加 (BWG),校正养转换率 (cFCR) 和总死亡率 (TM).
- 关键预测变量是卵内疫苗接种时间 (440-460小时的化时间),养群的年龄,屠宰年龄,化场和季节作为共同变量.
主要成果:
- 在卵子疫苗接种时间显著影响了BWG和cFCR.
- 在460小时的潜伏期内接种疫苗,对BWG和cFCR产生了最好的结果.
- 育种群体年龄,屠宰年龄和季节也影响了性能参数.
结论:
- 在近460小时的化期内进行卵内疫苗接种对于最大限度地提高Ross308AP公肉的BWG和cFCR至关重要.
- 最佳的疫苗接种时间有助于实现鸟类的全部遗传潜力.
- 了解疫苗接种时间和群体管理的相互作用是有效肉生产的关键.
相关概念视频
01:20Drug Product Performance: In Vitro–In Vivo Correlation
In pharmaceutical development, it's crucial to establish a predictive in vitro–in vivo correlation (IVIVC) for two or more formulations to gain a comprehensive understanding of release properties. IVIVC reduces the need for costly in vivo studies and facilitates the establishment of meaningful dissolution specifications with significant cost savings and decreased regulatory burden. Furthermore, a meaningful IVIVC should predict Cmax and AUC within 20%, aligning with FDA guidance while adhering...
01:23Vaccine Production
Vaccine production involves a sequence of upstream and downstream processes to generate a safe and effective immunological product. It begins with cultivating microorganisms, such as viruses or bacteria, to obtain antigenic material. For viral vaccines, mammalian host cells are grown in bioreactors and subsequently infected with the target virus. The virus replicates within the host cells, which are lysed to release viral particles. This lysate is then clarified through filtration or...