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在常见的环境下,牛肉公牛的表现,温度调节和肝功能暴露在受内菌感染或不受内菌感染的高体中

Joao Vitor G Takashe¹, Jackson Matthews¹, Daniel W Shike¹

¹Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States.

Translational animal science

|February 18, 2026

概括

由内菌感染的高菌引起的菌毒性严重损害牛肉公牛,减少生长并增加热应激. 接触藻类化物会损害肝脏新陈代谢和整体健康,影响牛生产.

科学领域:

动物科学动物科学
毒理学毒理学毒理学
类动物营养类动物营养

背景情况:

由内菌感染高菌的藻类引起的菌毒性,是肉牛生产者的主要经济问题.
藻类化物对动物健康,表现和温度调节有负面影响,尤其是在热应激期间.

研究的目的:

调查体毒性对牛肉公牛的表现,温度调节和肝脏新陈代谢的影响.
评估环境热应激的影响,包括热浪事件,对暴露于内菌感染的小母牛的影响.

主要方法:

二十四只安格斯公牛被分配给49天内菌感染 (E+) 或无内菌 (E-) 菌种子的饮食.
评估了性能 (DMI,ADG,体重),温度调节 (呼吸速率,直肠温度) 和肝脏代谢 (血清酶和代谢物分析).
持续记录环境数据,包括温度湿度指数 (THI).

主要成果:

与E-雌牛相比,E+雌牛的DMI,ADG,体重降低,呼吸速率和直肠温度升高 (P <0.05).
在两次热浪事件中,生理障碍恶化,最低THI与DMI负相关 (r = -0.20).
血清分析显示,E+公牛的AST升高,ALP降低和胆固醇降低,表明肝脏应激和代谢功能障碍 (P<0.05).

结论:

从内菌感染的体中暴露于藻类化物会导致牛肉的显著代谢和生理障碍.
体毒性会损害母牛的健康,温度调节和生产力,特别是在热应激条件下.
这些发现凸显了需要管理策略,以减轻体毒性对肉牛生产的影响.

关键词:

牛肉牛牛肉牛牛肉牛埃尔戈特类化合物埃尔戈特类化合物料摄入量料摄入量的毒性化是指的毒性化.肝功能肝功能肝功能

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