Transmission electron micrographs of adherent S. marcescens W225 cells on RT112 epithelial cells and bacteria encapsulated in small and large vacuoles. Cells were incubated 60 min with W225 at an MOI of approx. 5. After significant vacuolisation was visible, cells were fixed with glutaraldehyde. Bacteria are marked by arrows. Bars represent 1 μm.