在奶牛牛犊中服用Megasphaera elsdenii补充剂:对表现,行为和小牛皮发育的影响
G Mazon1, J M V Pereira2, K Nishihara3
1Department of Animal and Food Sciences, University of Kentucky, Lexington, KY 40546.
Journal of dairy science
|October 6, 2024
概括
带有Megasphaera elsdenii的口服益生菌改善了奶牛牛犊的表现和毛发育. 补充剂增加了料摄入量和体重增加,特别是在断奶和断奶后阶段.
科学领域:
- 动物科学动物科学
- 类动物营养 类动物营养
- 微生物学 微生物学
背景情况:
- 优化小牛的表现和小牛皮的发育对于牛肉行业来说至关重要.
- 巨 (Megasphaera elsdenii) 是一种菌,对宿主动物的健康有潜在的益处.
- 了解特定益生菌菌株对幼动物的影响是一个活跃的研究领域.
研究的目的:
- 为了评估含有Megasphaera elsdenii NCIMB 41125的口服益生菌在牛奶牛肉杂交小牛的疗效.
- 评估益生菌对小牛的表现,养行为和小牛皮参数的影响.
- 调查益生菌补充剂对乳头发育和森林特征的影响.
主要方法:
- 一项为期76天的随机试验,涉及31只雄性奶牛和肉牛杂交小牛.
- 三个治疗组:安慰剂,单剂量益生菌和双剂量益生菌.
- 监测表现 (DMI,ADG),养行为,乳房pH,VFA,前腹体重和乳头尺寸.
主要成果:
- 益生菌补充剂显著增加了每日固体料摄入量 (DMI) 和平均每日取量 (ADG).
- 接受益生菌的小牛的饮水量增加,并倾向于降低小牛皮的pH值.
- 在接受益生菌治疗的小牛中,观察到增加了毛重量和小毛皮面积.
结论:
- 断奶前补充Megasphaera elsdenii对乳牛牛犊的表现和毛发育产生了积极的影响.
- 益生菌似乎在关键的断奶和断奶后期间改善了料利用率和生长率.
- 需要进一步的研究来探索最佳的剂量策略和益生菌对肠微生物群的影响.
相关概念视频
01:26Rocky Mountain Spotted Fever
Rocky Mountain Spotted Fever (RMSF) is a severe tick-borne illness caused by Rickettsia rickettsii, a Gram-negative, coccobacillary bacterium. This pathogen is an obligate intracellular parasite, requiring a host cell for replication. Transmission occurs through the bite of an infected tick. In the United States, the most important vectors are Dermacentor variabilis (American dog tick) and Dermacentor andersoni (Rocky Mountain wood tick), though other tick species may also serve as vectors.
01:25Clinical Significance of Antibiotic Resistance
Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within the One...