FIG. 2.

Intracellular survival of salmonellae in cultured macrophages. J774 cells (A and B), RAW cells (C), RAW cells treated with gamma interferon (IFN-γ) (D), or LM-1 cells (E) were incubated in the presence of salmonellae for 10 min and then further incubated without extracellular bacteria as indicated. Intracellular survival is expressed relative to the number of CFU recovered from untreated infected cells at the earliest time point. Solid circles, untreated cells; open circles, BAF-treated cells. The standard deviations obtained from three independent experiments are indicated.