Intestinal bacteria

  • Mark Jepson
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Intestinal bacteria. Mark Jepson. Attribution 4.0 International (CC BY 4.0). Source: Wellcome Collection.

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Segmented filamentous bacteria (SFBs) embedded in the epithelium of a mouse Peyer's patch. Peyer's patches are regions of lymphoid tissue in the intestine of all mammals. These bacteria attach firmly to the brush border of the epithelial cells using a specialised structure that forms an indentation within, but does not penetrate, the plasma membrane. Similar unclassified microorganisms are present in all mammals examined.

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