Intestinal adherence associated with type IV pili of enterohemorrhagic Escherichia coli O157:H7
J. Clin. Invest. 117:11 doi:10.1172/JCI30727
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Figure 3
Ultrastructural SEM analysis of EDL933 adhering to HT-29 epithelial cells.

(A and B) Electron micrographs showing the presence of candle wick–like filamentous structures (arrows) protruding from the bacteria adhering to the mammalian cell surface. These filaments appear to mediate bacteria-to-bacteria interactions and direct contact with the cell surface.