蛋白质度和β-上腺激素激动剂对食者细菌群落的作用 完成牛肉公牛的牛犊
Alison P Pfau1, Madison T Henniger1, Kendall L Samuelson2
1Department of Animal Science, University of Tennessee, Knoxville, Tennessee, United States of America.
PloS one
|February 29, 2024
概括
饮食中的蛋白质含量,而不是 Ractopamine 化物,显著改变了牛牛母牛的体细菌群落. 不同的蛋白质度对微生物产生了影响,这表明与拉克托巴胺化有协同效应,改善了牛的表现.
科学领域:
- 动物科学动物科学
- 微生物学 微生物学
- 营养科学 营养科学
背景情况:
- 肉牛生产利用增长促进技术,如β-上腺素激动剂,以增强瘦组织的积累和性能.
- 体可降解蛋白 (RDP) 和不可降解蛋白 (RUP) 的含量水平对于牛的料效率和成长至关重要.
- 关于β-上腺体激动剂和不同蛋白质来源对反动物微生物组的联合作用的研究有限.
研究的目的:
- 为了研究不同食蛋白度和ractopamine化物 (RAC) 对完成牛肉公牛的头细菌群体的影响.
- 为了确定蛋白质水平 (RDP与RUP) 和RAC是否相互作用以影响微生物组成.
- 提供有关反动物微生物组对牛肉生产中常见增长促进策略的反应的见解.
主要方法:
- 140只完成性牛肉公牛被分配到一个3x2的因数处理安排,其中有三个蛋白质水平 (控制,高RDP,高RUP) 和两个RAC水平 (0或400毫克/天).
- 收集了样本,并使用16S rRNA基因测序 (V1-V3区域) 测序细菌DNA.
- 进行了生物信息分析 (phyloseq, dada2 in R) 和统计分析 (SAS 9),以评估β和α多样性并确定细菌差异.
主要成果:
- 乳头微生物组的β多样性受到蛋白质治疗和RAC (P<0.05) 的显著影响.
- 阿尔法多样性指标 (Chao1,Shannon) 没有显示治疗方法之间的显著差异 (P > 0.05).
- 蛋白质度的主要影响,但不是与RAC的相互作用,显著改变了细菌群落 (P <0.05).
结论:
- 饮食中的蛋白质度显著影响了在完成牛肉公牛的反动物细菌群落.
- 在这项研究中,ractopamine化对牛的细菌多样性产生了有限的直接影响.
- 蛋白质度和RAC可能会协同作用,以提高肉牛的整体性能,这需要进一步调查.
更多相关视频
相关概念视频
Microbes in Food Production
403
Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
403
Microbes in the Production of Fermented Foods
327
Lactic acid bacteria (LAB) and molds are instrumental in fermenting plant-based foods to enhance preservation and ensure year-round availability. These microbial processes convert plant carbohydrates into organic acids and other metabolites that inhibit spoilage organisms and contribute to the sensory qualities of the final product.In sauerkraut production, cabbage goes through a microbial succession that starts with cocci such as Leuconostoc mesenteroides. These microbes begin fermentation by...
327
Probiotics
296
Probiotics are live, non-pathogenic microorganisms that confer health benefits by modulating the gut microbiota. The human gastrointestinal tract harbors a complex microbial ecosystem, and the balance of this microbiota is crucial for digestive and systemic health. Among the most extensively studied and utilized probiotics are species formerly classified within the genera Lactobacillus and Bifidobacterium. These organisms not only naturally colonize the human gut but are also consumed through...
296
Production of Antibiotics
265
Penicillin, one of the earliest and most widely used antibiotics, is produced industrially by the filamentous fungus Penicillium chrysogenum. Large stirred-tank bioreactors ranging from tens to hundreds of thousands of liters maintain tightly controlled temperature, pH, and dissolved oxygen conditions to support fungal metabolism and maximize antibiotic yield. Penicillin is a secondary metabolite, synthesized primarily during the stationary growth phase, which requires a carefully managed...
265
Functions of the Gut Microbiota
233
The gut microbiota includes trillions of microorganisms that colonize the human gastrointestinal tract, including bacteria, archaea, viruses, and fungi. This complex ecosystem plays a critical role in maintaining intestinal and systemic health. Most of these microbes inhabit the large intestine, establishing a relatively stable and diverse community that contributes to gut homeostasis through various metabolic, immunological, and protective mechanisms.Dominant bacterial phyla, such as...
233
Clinical Significance of Antibiotic Resistance
90
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...
90


