Rearrangement of actin filaments in T84 cells upon infection with E2348/69 is not affected by treatment with MAP kinase inhibitors. FITC-phalloidin was used to localize actin filaments in control cells without (A) or with (B) DMSO, EPEC-infected T84 cells (C), and cells treated with PD98059 (D) or SB203580 (E), alone or together (F), before and during infection. Original magnification, ×2,400. Identical results were obtained at least three times.