UAH BG JDS 2024 Supplementary Table 2

<i>Bacillus</i>-based direct-fed microbials (DFM) are common in various production livestock diets. They have shown positive benefits on gut health, immune metrics, and production. Thus, objectives were to evaluate the effects of a <i>Bacillus</i>-based DFM on production, metabolism, inflammatory biomarkers, and gastrointestinal tract permeability during and following feed restriction in dairy cows. Results indicate that a low dose of DFM may benefit some production metrics whereas a higher dose appeared to alter key variables of immune activation.

以芽孢杆菌属（Bacillus）为基础的直接饲喂微生物（Direct-Fed Microbials, DFM）在各类畜禽生产日粮中应用十分普遍。现有研究证实，此类制剂对肠道健康、免疫指标及生产性能均具有积极效益。据此，本研究旨在评估以芽孢杆菌属为基础的直接饲喂微生物在泌乳奶牛限饲期间及限饲结束后，对其生产性能、代谢水平、炎症生物标志物及胃肠道通透性的影响。研究结果显示，低剂量的该直接饲喂微生物或可改善部分生产性能指标，而高剂量则似乎会改变免疫激活的关键变量。