Figure 8. Scanning electron microscopy of the primary chicken intestinal epithelial cells infected with the Shigella strain ZD02.

Uninternalized bacteria (arrowhead) were seen near the epithelial cells 1 h post-inoculation (A. Scale bar = 10 µm). Bacteria (arrowheads) attached to the surfaces of the epithelial cells at 1 h (B. Scale bar = 3 µm). Bacteria (arrowheads) were being internalized by the epithelial cells at 2 h (C. Scale bar = 3 µm).