Apoptosis of Epithelial Cells and Macrophages due to Nonpigmented Serratia marcescens Strains

Figure 1

Cytotoxic effect of S. marcescens strains to HEp-2 cells. The monolayer was infected with an MPU S42 strain and observed using an inverted microscope, (a) at 1 h postinfection, (b) at 2 h p.i., and (c) at 4 h.

(a)

(b)

(c)