Effects of selenium supplementation on rumen microbiota, rumen fermentation and apparent nutrient digestibility of ruminant animals: A review

Amin Omar Hendawy, Satoshi Sugimura, Kan Sato, Mohamed Mohsen Mansour, Ayman H. Abd El‐Aziz, Haney Samir, Md Aminul Islam, A. B.M. Rubayet Bostami, Ahmed S. Mandour, Ahmed Elfadadny, Rokaia F. Ragab, Hend A. Abdelmageed, Amira Mohammed Ali

    Research output: Contribution to journalReview articlepeer-review

    7 Citations (Scopus)


    Enzymes excreted by rumen microbiome facilitate the conversion of ingested plant materials into major nutrients (e.g., volatile fatty acids (VFA) and microbial proteins) required for animal growth. Diet, animal age, and health affect the structure of the rumen microbial community. Pathogenic organisms in the rumen negatively affect fermentation processes in favor of energy loss and animal deprivation of nutrients in ingested feed. Drawing from the ban on antibiotic use during the last decade, the livestock industry has been focused on increasing rumen microbial nutrient supply to ruminants through the use of natural supplements that are capable of promoting the activity of beneficial rumen microflora. Selenium (Se) is a trace mineral commonly used as a supplement to regulate animal metabolism. However, a clear understanding of its effects on rumen microbial composition and rumen fermentation is not available. This review summarized the available literature for the effects of Se on specific rumen microorganisms along with consequences for rumen fermentation and digestibility. Some positive effects on total VFA, the molar proportion of propionate, acetate to propionate ratio, ruminal NH3‐N, pH, enzymatic activity, ruminal microbiome composition, and digestibility were recorded. Because Se nanoparticles (SeNPs) were more effective than other forms of Se, more studies are needed to compare the effectiveness of synthetic SeNPs and lactic acid bacteria enriched with sodium selenite as a biological source of SeNPs and probiotics. Future studies also need to evaluate the effect of dietary Se on methane emissions.

    Original languageEnglish
    Article number4
    Issue number1
    Publication statusPublished - 2022 Jan


    • Bacterial communit
    • Buffalo
    • Cow
    • Enzymatic activity
    • Fermentation
    • Goat
    • Lactic acid bacteria/probiotic
    • Microbial/microflora/microbiota
    • Nanoparticles
    • Nutrient/nutrition
    • Purine derivatives
    • Rumen/ruminal/ruminant
    • Selenium
    • Selenium deficiency
    • Selenium toxicity digestibility
    • Selenium yeast
    • Sheep
    • Sodium selenite/sodium selenate
    • Volatile fatty acids

    ASJC Scopus subject areas

    • Food Science
    • Biochemistry, Genetics and Molecular Biology (miscellaneous)
    • Plant Science


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