Bacillus subtilis M6 improves intestinal barrier, antioxidant capacity and gut microbial composition in AA broiler
Bacillus subtilis can secret a variety of substances to improve human and animal gut health via inhibiting the proliferation of pathogenic bacteria. In this study, a fast-growing and stress-resistant strain of Bacillus subtilis M6 ( B. subtilis M6 ) were isolated, which showed a strong antibacterial...
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Veröffentlicht in: | Frontiers in nutrition (Lausanne) 2022-08, Vol.9, p.965310-965310 |
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Sprache: | eng |
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Zusammenfassung: | Bacillus subtilis
can secret a variety of substances to improve human and animal gut health
via
inhibiting the proliferation of pathogenic bacteria. In this study, a fast-growing and stress-resistant strain of
Bacillus subtilis M6
(
B. subtilis M6
) were isolated, which showed a strong antibacterial activity to
E. coli
K88,
S. typhimurium
ATCC14028, and
S. aureus
ATCC25923
in vitro
.
In vivo
studies showed that
B. subtilis M6
can significantly improve the average daily gain (ADG) using an AA broiler model. Dietary
B. subtilis M6
improved the intestinal morphology. The villus height of jejunum and ileum were significantly increased. The concentration of malondialdehyde (MDA) in the ileal mucosa was significantly reduced in
B. subtilis M6
treatment group, which suggested the oxidative stress of the ileum was significantly relieved. Though the β diversity of treatments was not significantly,
B. subtilis M6
improved the composition of intestinal microbes, especially at the level of caecum genus, the dominant genus was changed from
Ruminococcus
to
Akkermansia
, which indicated the change of intestinal carbohydrate nutrition. In conclusion, these data indicate that the
B. subtilis
M6 shows a probiotic potential to improve intestinal health
via
altering gut microbiota. |
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ISSN: | 2296-861X 2296-861X |
DOI: | 10.3389/fnut.2022.965310 |