实验试验中肉的菌病感染和生长表现:包括调节因子在内的元分析的见解
Luís Filipe Villas Boas de Freitas1, Nilva Kazue Sakomura1, Matheus de Paula Reis1
1Animal Science Department, Faculty of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal, São Paulo 14884-900, Brazil.
Poultry science
|September 4, 2023
概括
肉中的菌病显著降低了料摄入量,体重增加和料效率. 性能损失在感染后的5天左右达到顶峰,在13天后观察到逐渐恢复,尽管影响仍然存在.
科学领域:
- 禽畜科学 禽畜科学 禽畜科学
- 动物营养 动物营养
- 寄生虫学的寄生虫学
背景情况:
- 菌病,是由Eimeria spp.引起的 原生虫是一种主要的家禽疾病,影响肉的表现并造成经济损失.
- 了解菌病对肉生长指标的定量影响对于有效的疾病管理至关重要.
研究的目的:
- 量化评估菌病对 brojler性能指标的影响,包括平均每日料摄入量 (ADFI),平均每日取量 (ADG) 和每料取量 (G:F).
- 评估诸如感染后几天 (DPI) 等因素如何影响Eimeria spp.引起的性能变化的严重程度. 感染. 感染.
主要方法:
- 通过使用55篇论文 (63项实验) 的数据进行了元分析,这些论文涉及与各种Eimeria物种有挑战的肉.
- 相对于对照组,计算了性能变化 (Δ),并将线性平原模型与DPI相匹配,以分析时间效应.
- 考虑了Eimeria类型,剂量,感染年龄,遗传线,性别和住房等独立变量.
主要成果:
- 影响表现变化的主要因素是感染后的几天 (DPI).
- 在5个DPI (急性阶段) 时,平均减少是: ΔADFI -19.0%, ΔADG -39.8%, ΔG:F -25.5%.
- 恢复观察到大约13个DPI,ADFI和ADG的性能变化分别从-3.75%到-10.5%. 由于肠道病变,ADG受到的影响比ADFI更严重.
结论:
- 菌病显著损害肉的表现,最严重的影响发生在急性阶段 (大约5 DPI).
- 逐渐恢复阶段开始大约13 DPI,但业绩赤字可能会持续.
- 这项研究为了解Eimeria spp.提供了定量框架. 随着时间的推移,对肉生产率的影响.
相关概念视频
Background and Environment Affect Phenotype
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
Factors Influencing Microbial Growth: Osmolarity
Osmolarity is the measure of solute concentration in a solution. It plays a critical role in determining water availability for organisms. Water moves across semipermeable membranes through osmosis, flowing from regions of lower solute concentration (more dilute) to regions of higher solute concentration (more concentrated).In high-solute environments, microbial cells lose water, leading to dehydration and inhibited growth. The extent to which water is available to microbes in such environments...


