纽卡斯尔病毒病的因果关系与产母的生产力相关联
Mohammed Abdelhameed Mohammed Kamal1, Mohamed Atef2, M A Khalf2
1Department of Veterinary Hygiene and Management, Faculty of Veterinary Medicine, Cairo University, Giza, 12211, Egypt. mohamed.a.kamal@cu.edu.eg.
Scientific reports
|July 11, 2024
概括
优化微气候条件,特别是空气流量,显著影响着产母的生产力和蛋重. 温度和湿度等环境因素在纽卡斯尔病病毒爆发期间对生产指数没有直接影响.
科学领域:
- 禽畜科学 禽畜科学 禽畜科学
- 动物养殖 动物养殖
- 环境生理学环境生理学
背景情况:
- 环境条件极大地影响商业家禽养殖场的产卵健康,福利和生产力.
- 封闭式系统中的微气候变化可能会影响生产指数和疾病抵抗力.
研究的目的:
- 为了研究微气候变化 (温度,RH%,空气速度,THI) 和产量指数 (EPP,EW) 之间的关联.
- 评估微气候对幽默免疫反应,粗病理和纽卡斯尔病病毒 (NDV) 爆发期间的组织病理变化的影响.
主要方法:
- 在埃及开罗的一个产卵设施中进行了为期七个月的研究,测量了不同地点的微气候参数.
- 评估的月度生产率指数:蛋产量百分比 (EPP),蛋重量 (EW),料摄入量和料转换率.
- 在意外的NDV爆发后评估了幽默性免疫反应,毛病学和组织病理学.
主要成果:
- 在设施的前后之间观察到EPP和EW的显著变化,受空气速度 (AV) 的影响.
- AV对两侧的EW产生了积极的影响,对后侧的EPP产生了负面影响;温度,RH%,THI没有预测EPP或EW.
- 由于NDV引起的幽默免疫反应和组织病变病变在不同的微气候中一致.
结论:
- 优化微气候,特别是持续的空气流,对于提高产母的表现和蛋质量至关重要.
- 考虑到季节性变化和生物安全的量身定制的环境管理战略对于减轻现场挑战至关重要.
相关概念视频
01:27Correlation and Causation
37.6K
Statistical tests can calculate whether there is a relationship, or correlation, between independent and dependent variables. An indirect relationship of the variables signifies a correlation, while a direct relationship shows causation. If it is determined that no connection exists between the variables, then the correlation is a coincidence.
Correlation versus Causation
If the dependent variable increases or decreases when the independent variable increases, there is a positive or negative...
Correlation versus Causation
If the dependent variable increases or decreases when the independent variable increases, there is a positive or negative...
37.6K
00:57Viral Recombination
23.4K
Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
23.4K