Dynamic effects of dietary shifts and temporal variation on the rumen microbiota of dairy goats differing in SARA tolerance

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ID: 331713
2026
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Abstract
Subacute ruminal acidosis (SARA) is a common metabolic disorder observed in intensive dairy production systems and is frequently associated with disruptions in rumen microbial homeostasis. In this study, a SARA model was successfully constructed by increasing the proportion of dietary concentrate and rumen-degradable starch (RDS) to examine the dynamic succession of the rumen microbiota across individuals. Forty-seven dairy goats were selected and classified into a control group (CON), low-RDS susceptible/tolerant groups (LRDSS/LRDST), and high-RDS susceptible/tolerant groups (HRDSS/HRDST) according to diet composition and individual sensitivity to SARA. Analysis of the microbial community revealed that the rumen microbiota of healthy and SARA-tolerant goats exhibited a high degree of structural similarity, whereas that of SARA-susceptible individuals underwent a pronounced compositional shift. These microbial shifts were accompanied by distinct alterations in rumen fermentation patterns, characterized by changes in volatile fatty acid (VFA) profiles, indicating functional divergence between tolerant and susceptible goats during SARA development. Notably, the relative abundance of Candidatus_Saccharimonas exhibited opposing trends between tolerant and susceptible goats and was identified as a key discriminant genus in microbial clustering. Moreover, random forest analysis revealed Candidatus_Saccharimonas as one of the most influential taxa contributing to rumen microbial differentiation, suggesting that it may serve as a potential microbial biomarker for distinguishing dairy goats in terms of SARA susceptibility or tolerance. Collectively, these findings suggest that Candidatus_Saccharimonas plays a crucial role in maintaining rumen microecological stability and enhancing the tolerance mechanisms of ruminants against SARA.
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openalex_W7220731424 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Jinhui He, Jingyi Xu, Yiyang Sun, Wei Liu, Junhu Yao, Yangchun Cao, Shengru Wu
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Journal italian journal of animal science
Year 2026
DOI
10.1093/jas/skag322
URL
https://doi.org/10.1093/jas/skag322
Keywords Keywords not found

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