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. 1998 Nov 16;188(10):1907–1916. doi: 10.1084/jem.188.10.1907

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Transmission micrographs of the ileal villi infected with REPEC O103 (A), AAF004 (B), and AAF005 (C). The REPEC O103 are intimately associated with the ileal villi and form pedestal-like structures, which are indicated by arrows. Microbodies and elongated and swollen microvilli were also observed. In contrast, AAF004 (EspA⁻) and AAF005 (EspB⁻) do not cause A/E lesions, and intracellular damage was not seen. All ileal sections were taken 96 h after infection. Original magnification, ×6,300.